H-Series Engine Specifications, Swap Guides and Faq.
02-14-2011
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H-Series Engine Specifications, Swap Guides and Faq.
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H22
Valve Gear: Belt-driven dual overhead cams, 4 valves per cylinder, variable timing and lift
92-96 versions use closed-deck blocks but FRM liners were used in 94-96 while the 97-01 versions used open-deck blocks with FRM liners.
H22a
Found in:
1991-1996 JDM Prelude Si
1997-2001 JDM Prelude SiR
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp) @ 6,800 rpm
Torque: 161.5 ft·lbf (218.96 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a
Found in:
1997-2001 JDM Prelude SiR
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp) @ 6,800 rpm
Torque: 161 ft·lbf (218 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a
Found in:
1997-2001 JDM Prelude SiR S-Spec
1997-2001 JDM Prelude Type S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 220 PS (162 kW; 217 hp) @ 7,200 rpm
Torque: 163 ft·lbf (221 N·m) @ 6,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Red.
H22a
Found in:
1998-2002 Accord Euro-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 220 PS (162 kW; 217 hp) @ 7,200 rpm
Torque: 163 ft·lbf (221 N·m) @ 6,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Red.
H22a
Found in:
1994-1997 JDM Accord SiR
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 190 PS (140 kW; 187 hp) @ 6,800 rpm
Torque: 152 ft·lbf (206 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a1
1992-1996 USDM Prelude VTEC
1992-1996 CDM Prelude SR-V
1992-1996 ADM VTi-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 190 PS (140 kW; 187 hp) @ 6,800 rpm
Torque: 158 ft·lbf (214 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.8 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a2
1992-1996 EDM Prelude 2.2i VTEC
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 185 PS (136 kW; 182 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Valve Cover: Black.
H22a3
Found in:
1996 VTEC model in various countries around the world denoted with regional code KU.
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: ?
Torque:?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H22a4
Found in:
1997-2001 USDM Prelude Base and Type-SH
1997-2001 CDM Prelude Base, Type-SH and SE
1997-1998 ADM Prelude VTi-R and VTi-R ATTS
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 x 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp) @ 7,000 rpm
Torque:156 ft·lbf (212 N·m) @ 5,250 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Open Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.8 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 55mm (1997 only = 50mm)
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a5
Found in:
1997-1998 EDM Prelude 2.2VTi and VTi-S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 185 PS (136 kW; 182 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H22a7
Found in:
1998-2002 EDM Accord Type-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 215 PS (158 kW; 212 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Red.
H22a8
Found in:
1999-2001 EDM Prelude 2.2VTi and VTi-S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Red.
H22z1
Found in:
1999-2001 ADM VTi-R and VTi-R ATTS
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87.0 × 90.70 mm
Compression ratio:10.6-11.0:1
Power: . It is thought to be identical to the H22A4, however, there is speculation that power was increased from 200 PS (147 kW; 197 hp) to 203 PS (149 kW; 200 hp).
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H23
The H23 is an increased-stroke, non-VTEC version of the H22, used in Japan, North America and Europe. It shares the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22.
Engine Control System: Honda Systems PGM-FI with port fuel injection
Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder
H23A
Found in:
1992-1996 JDM Ascot Innova 2.3 Si-Z
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 165 PS (121 kW; 163 hp)
Max torque: 156 ft·lbf (212 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: Open Deck.
Comp. Height: 30.5mm/1.203
Deck Height: 219.5mm/8.643
Head CC: 50.0cc
Rod Length: 141.5mm/5.572
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: +4.3 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 55mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H23a1
Found in:
1992-1996 USDM
1995 USDM
1992-1996 CDM
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 162 PS (119 kW; 160 hp)
Max torque: 156 ft·lbf (212 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: Closed Deck.
Comp. Height: 30.5mm/1.203
Deck Height: 219.5mm/8.643
Head CC: 50.0cc
Rod Length: 141.5mm/5.572
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -9.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 34mm/1.34
Exhaust Valve Diam: 29mm/1.14
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H23A1
Found in:
1992-1996 ADM
1991-1993 ADM
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 160 PS (118 kW; 158 hp)
Max torque: 156 ft·lbf (212 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: Closed Deck.
Comp. Height: 30.5mm/1.203
Deck Height: 219.5mm/8.643
Head CC: 50.0cc
Rod Length: 141.5mm/5.572
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H23a2
Found in:
1992-1996 EDM Prelude 2.3i
Bore × Stroke: ?
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 160 PS (118 kW; 158 hp)
Max torque: 154 ft·lbf (209 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H23a3
Found in:
1993-1995 EDM Accord 2.3i SR
1992-1996 EDM Rover 623 SLi, GSi, and iS
Bore × Stroke: ?
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 158 PS (116 kW; 156 hp)
Max torque: 154 ft·lbf (209 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H23a DOHC VTEC
In 1998, Honda of Japan produced a rare DOHC VTEC version of the H23A engine for use in Japan only. It has been factory modified with an internal oil passage in the H23A block to operate the VTEC solenoid in the H22A head. Having the same horsepower rating as the H22A engine but it has a lower redline because it has a longer stroke than H22A. The H23A DOHC VTEC Engine has the largest displacement of the H
Found in:
1998-2002 JDM Accord Wagon SiR
1998-2002 JDM Accord Wagon AWD
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 10.6:1
Max power: 200 PS (147 kW; 197 hp) &
Max torque: 163 ft·lbf (221 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Blue.
Transmissions:
97-01 Prelude SH
Part #: M2U4
1st Gear: P3.285
2nd Gear: 1.956
3rd Gear: 1.344
4th Gear: 1.071
5th Gear: 0.870
Reverse: ??
Final Drive:4.062
97-01 Prelude BASE
Part #: M2Y4
1st Gear:3.285
2nd Gear: 1.956
3rd Gear: 1.344
4th Gear: 1.034
5th Gear: 0.812
Reverse: ??
Final Drive:4.266
1992-1996 Prelude VTEC
Part #: M2F4
1st Gear: 3.307
2nd Gear: 1.950
3rd Gear: 1.360
4th gear: 1.071
5th Gear: 0.870
Reverse: ??
Final Drive: 4.266
1992-1996 JDM Prelude VTEC w/o LSD
Part #: M2A4
1st Gear: 3.307
2nd Gear: 1.950
3rd Gear: 1.160
4th gear: 1.034
5th Gear: 0.787
Reverse: ??
Final Drive: 4.266
1992-1996 Prelude VTEC w/ LSD
Part #: M2B4
1st Gear: 3.307
2nd Gear: 1.950
3rd Gear: 1.360
4th gear: 1.034
5th Gear: 0.787
Reverse: ??
Final Drive: 4.266
1992-1996 Prelude Si (JDM F22B)
Part #: M2J5
1st Gear: 3.307
2nd Gear: 1.810
3rd Gear: 1.269
4th gear: 0.966
5th Gear: 0.787
Reverse:??
Final Drive: 4.266
1992-1996 Prelude Si
Part #: M2S4
1st Gear: 3.307
2nd Gear: 1.857
3rd Gear: 1.320
4th gear: 1.034
5th Gear: 0.812
Reverse: ??
Final Drive: 4.266
1992-1996 Prelude S
Part #:M2L5
1st Gear: 3.310
2nd Gear: 1.810
3rd Gear: 1.232
4th gear: 0.900
5th Gear: 0.710
Reverse: ??
Final Drive:4.062
1988-1991 Prelude Si
Part #: ??
1st Gear: 3.166
2nd Gear: 1.857
3rd Gear: 1.259
4th gear: 0.935
5th Gear: 0.794
Reverse: ??
Final Drive: 4.062
1988-1991 Prelude
Part #: ??
1st Gear: 3.166
2nd Gear: 1.857
3rd Gear: 1.222
4th gear: 0.906
5th Gear: 0.742
Reverse: ??
Final Drive: 4.062
1998-2001 JDM Accord Type-R
Part #: U2Q7
1st Gear: 3.307
2nd Gear: 2.090
3rd Gear: 1.481
4th gear: 1.071
5th Gear: 0.870
Reverse: ??
Final Drive: 4.266
1998-2001 EDM Accord Euro-R
Part #:T2W4
1st Gear: 3.285
2nd Gear: 2.090
3rd Gear: 1.481
4th gear: 1.071
5th Gear: 0.812
Reverse: ??
Final Drive: 4.266
1994-1997 Accord DX/LX
Part #: P2A5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.903
5th Gear: 0.685
Reverse: 3.000
Final Drive:4.062
1994-1997 Accord EX
Part #: P2U5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.933
5th Gear:0.685
Reverse: 3.000
Final Drive: 4.062
1994-1997 Accord LX/EX Wagon
Part #: P2A4
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.903
5th Gear: 0.685
Reverse: 3.000
Final Drive: 4.062
1994-1997 Accord DX/LX
Part #: P2A5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.903
5th Gear: 0.685
Reverse: 3.000
Final Drive: 4.062
1994-1997 Accord EX
Part #: P2U5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.933
5th Gear: 0.685
Reverse: 3.000
Final Drive: 4.062
Swap Info:
General Honda Swap Information
http://honda-tech.com/showthread.php?t=878010
Just swapped and it won't start!
http://www.honda-tech.com/showthread.php?t=970610
ITR vs. H22 Swap
http://honda-tech.com/showthread.php?t=626892
B- vs H- vs D-Series Weight Arguments Settled By Scale
http://honda-tech.com/showthread.php?t=684550
Rumors or Truth.. is an H22 to heavy to swap?
http://honda-tech.com/showthread.php?t=362984
H22 into Civic EG/EK
http://www.honda-tech.com/showthread.php?t=650329
H22 into EF
http://www.honda-tech.com/showthread.php?t=1898036
H22 into a DA
http://forums.g2ic.com/showthread.php?38801-H22-in-a-G2
H22 into DC
http://www.honda-tech.com/showthread.php?t=460871
H22 into a CB/CD
http://www.modified.com/tech/0311scc...wap/index.html
H22 into an EM2
http://honda-tech.com/showthread.php?t=2483112
How to Boost Faq:
https://www.civicforums.com/forums/2...ml#post4518610
H23a head on F22a block DIY:
https://www.civicforums.com/forums/2...22a-block.html
Valve Cover Colour Variations:
If anyone has any information to add please post it up, I'll add it and give you rep.
The Honda H-Series Engines
The first application for the H-series four-cylinder was in the nose of the Japanese market Honda Prelude Si VTEC of late 1991.
Using a 87mm bore and 90.7mm stroke, the BB1/BB4 Prelude’s H22A engine displaces a total of 2156cc. The engine is equipped with a DOHC, four-valve-per-cylinder head with PGM-FI multi-point injection system and a distributor ignition system. But more important is the VTEC variable valve timing and lift system that lets the engine produce great top-end power – try 147kW at 6800 rpm and 219Nm at 5500 rpm. The compression ratio of the VTEC H22A is set to 10.6:1 which requires the use of premium unleaded fuel.
The H-series engine is designed for transverse mounting and, in the Prelude, is available with either a five-speed manual gearbox or a four-speed auto. Drive is to the front wheels.
In 1992, the same engine design was re-released to incorporate a 95mm stroke - this increases swept capacity to 2258cc (2.3-litre). Unfortunately, the newly created H23A engine doesn’t get VTEC breathing and employs a lower compression ratio (9.8:1). Despite its slightly increased capacity, the H23A trails the output of the VTEC H22A by a considerable margin - peak power is 121kW and there's 211Nm of torque. Note that these figures are achieved at much lower revs – 5800 and 4500 rpm respectively. This engine comes fitted to the top-of-the-range Japanese market CC4/CC5 Ascot Innova hardtop sedan. Most are fitted with automatic transmissions.
In Australia, the H-series engine was first seen in Prelude of late 1991. However, unlike Japanese models, the first examples were sold with the non-VTEC H23A (as used Ascot Innova). In Australian guise, the H23A is rated at 118kW at 5800 rpm and 209Nm at 4500 rpm. A 96kW 2.2-litre F22A was also introduced in the base model – this is not to be confused with the more powerful H-series! The Australian market had to wait until 1994 to receive the muscular VTEC H22A. With 142kW at 6800 rpm and 212Nm at 5250 rpm on local premium unleaded fuel, the 1300+ kilogram VTEC equipped Prelude VTi-R can accelerate to 100 km/h in 8-seconds.
In Japan during 1993, the VTEC H22A made an appearance in a second vehicle - the high performance version of the CD6 Honda Accord Si-R. The Accord Si-R engine has the same specs as the go-fast Prelude but output is reduced slightly to 140kW/206Nm. This is possibly due to a more restrictive exhaust system. Like the Prelude, five-speed manuals or four-speed autos are available. Interestingly, an auto-only coupe version of the Accord Si-R was also introduced during 1994 and a wagon Si-R model appeared in 1996 (chassis codes CD8 and CF2 respectively).
The updated BB6 Prelude Si-R appeared for the 1997 model year bringing an optional sports-shift auto trans and Honda’s ATTS (Active Torque Transfer System) but, curiously, it appears Japanese versions have no extra power.
In contrast, the 1997 Australian-delivered Prelude underwent significant changes. The non-VTEC H23A was dropped and a revised 118kW F22A engine was used in its place. The existing VTEC H22A was updated with a new open-deck block, fibre reinforced metal cylinder liners (achieving better heat dispersion and reduced weight), full floating pistons, an aluminium oil pan and improved intake and exhaust flow. These changes raised output to 143kW (a 1kW gain over the previous generation Australian-spec H22A). An update in late ’98 lifted power further to 147kW. Like Japanese models, a sports-shift auto and ATTS could be specified in the Prelude from 1997.
The biggest development during 1997 was release of the Japanese market Prelude Si-R Type S. The Type S has a hotter version of the VTEC H22A incorporating a 11:1 compression pistons, a ported head, larger throttle body, altered cams and VTEC characteristics, a low restriction intake system and improved headers/exhaust. These changes achieve some healthy gains – 162kW at 7200 rpm and 221Nm at 6700 rpm. The same engine was then released in the 2000 ‘new generation’ GH-CL Honda Accord Euro R and 2000 Torneo Euro R. We believe the Prelude Si-R Type S, Accord Euro R and Torneo Euro R come with only a five-speed manual ‘box. A red valve cover identifies these high-spec engines.
About now you may be wondering whether the long-stroke H23A can be combined with VTEC variable valve lift and timing. Well, the Japanese market Honda Accord wagon Si-R of 1999 (chassis code CH9) proves it can be done...
The ’99 Accord wagon Si-R packs a VTEC H23A engine with a relatively mild tune and a 10.6:1 compression ratio (0.4 lower than used in the Prelude Si-R Type S). Somewhat disappointingly, the VTEC H23A makes hardly any more grunt than the original VTEC H22A - 147kW at 6800 rpm and 221Nm at 5300 rpm. A four-speed sports-shift automatic transmission comes standard and an AWD driveline was available from 2000 (CL2 chassis code).
Interestingly, the H-series four was never used in anything other than the Prelude, Accord, Ascot Innova and Torneo Euro R. Production ended when the K-series four appeared in 2002. It’s difficult to understand why the H-series VTEC engines – the biggest of all Honda VTEC fours – are largely underrated. They have proven very reliable (early ‘90s Prelude VTi-Rs are still going strong) and they’re one of the ultimate atmo fours on the market. From a tuning perspectively, it’s unlikely you’ll find much more power with conventional tuning methods – maybe 10 percent – so it’s you’ll need to add forced induction or a multi-stage nitrous kit to give these engines a significant boost throughout the rev range. Fortunately, it’s never been cheaper or easier to add a turbo...
The first application for the H-series four-cylinder was in the nose of the Japanese market Honda Prelude Si VTEC of late 1991.
Using a 87mm bore and 90.7mm stroke, the BB1/BB4 Prelude’s H22A engine displaces a total of 2156cc. The engine is equipped with a DOHC, four-valve-per-cylinder head with PGM-FI multi-point injection system and a distributor ignition system. But more important is the VTEC variable valve timing and lift system that lets the engine produce great top-end power – try 147kW at 6800 rpm and 219Nm at 5500 rpm. The compression ratio of the VTEC H22A is set to 10.6:1 which requires the use of premium unleaded fuel.
The H-series engine is designed for transverse mounting and, in the Prelude, is available with either a five-speed manual gearbox or a four-speed auto. Drive is to the front wheels.
In 1992, the same engine design was re-released to incorporate a 95mm stroke - this increases swept capacity to 2258cc (2.3-litre). Unfortunately, the newly created H23A engine doesn’t get VTEC breathing and employs a lower compression ratio (9.8:1). Despite its slightly increased capacity, the H23A trails the output of the VTEC H22A by a considerable margin - peak power is 121kW and there's 211Nm of torque. Note that these figures are achieved at much lower revs – 5800 and 4500 rpm respectively. This engine comes fitted to the top-of-the-range Japanese market CC4/CC5 Ascot Innova hardtop sedan. Most are fitted with automatic transmissions.
In Australia, the H-series engine was first seen in Prelude of late 1991. However, unlike Japanese models, the first examples were sold with the non-VTEC H23A (as used Ascot Innova). In Australian guise, the H23A is rated at 118kW at 5800 rpm and 209Nm at 4500 rpm. A 96kW 2.2-litre F22A was also introduced in the base model – this is not to be confused with the more powerful H-series! The Australian market had to wait until 1994 to receive the muscular VTEC H22A. With 142kW at 6800 rpm and 212Nm at 5250 rpm on local premium unleaded fuel, the 1300+ kilogram VTEC equipped Prelude VTi-R can accelerate to 100 km/h in 8-seconds.
In Japan during 1993, the VTEC H22A made an appearance in a second vehicle - the high performance version of the CD6 Honda Accord Si-R. The Accord Si-R engine has the same specs as the go-fast Prelude but output is reduced slightly to 140kW/206Nm. This is possibly due to a more restrictive exhaust system. Like the Prelude, five-speed manuals or four-speed autos are available. Interestingly, an auto-only coupe version of the Accord Si-R was also introduced during 1994 and a wagon Si-R model appeared in 1996 (chassis codes CD8 and CF2 respectively).
The updated BB6 Prelude Si-R appeared for the 1997 model year bringing an optional sports-shift auto trans and Honda’s ATTS (Active Torque Transfer System) but, curiously, it appears Japanese versions have no extra power.
In contrast, the 1997 Australian-delivered Prelude underwent significant changes. The non-VTEC H23A was dropped and a revised 118kW F22A engine was used in its place. The existing VTEC H22A was updated with a new open-deck block, fibre reinforced metal cylinder liners (achieving better heat dispersion and reduced weight), full floating pistons, an aluminium oil pan and improved intake and exhaust flow. These changes raised output to 143kW (a 1kW gain over the previous generation Australian-spec H22A). An update in late ’98 lifted power further to 147kW. Like Japanese models, a sports-shift auto and ATTS could be specified in the Prelude from 1997.
The biggest development during 1997 was release of the Japanese market Prelude Si-R Type S. The Type S has a hotter version of the VTEC H22A incorporating a 11:1 compression pistons, a ported head, larger throttle body, altered cams and VTEC characteristics, a low restriction intake system and improved headers/exhaust. These changes achieve some healthy gains – 162kW at 7200 rpm and 221Nm at 6700 rpm. The same engine was then released in the 2000 ‘new generation’ GH-CL Honda Accord Euro R and 2000 Torneo Euro R. We believe the Prelude Si-R Type S, Accord Euro R and Torneo Euro R come with only a five-speed manual ‘box. A red valve cover identifies these high-spec engines.
About now you may be wondering whether the long-stroke H23A can be combined with VTEC variable valve lift and timing. Well, the Japanese market Honda Accord wagon Si-R of 1999 (chassis code CH9) proves it can be done...
The ’99 Accord wagon Si-R packs a VTEC H23A engine with a relatively mild tune and a 10.6:1 compression ratio (0.4 lower than used in the Prelude Si-R Type S). Somewhat disappointingly, the VTEC H23A makes hardly any more grunt than the original VTEC H22A - 147kW at 6800 rpm and 221Nm at 5300 rpm. A four-speed sports-shift automatic transmission comes standard and an AWD driveline was available from 2000 (CL2 chassis code).
Interestingly, the H-series four was never used in anything other than the Prelude, Accord, Ascot Innova and Torneo Euro R. Production ended when the K-series four appeared in 2002. It’s difficult to understand why the H-series VTEC engines – the biggest of all Honda VTEC fours – are largely underrated. They have proven very reliable (early ‘90s Prelude VTi-Rs are still going strong) and they’re one of the ultimate atmo fours on the market. From a tuning perspectively, it’s unlikely you’ll find much more power with conventional tuning methods – maybe 10 percent – so it’s you’ll need to add forced induction or a multi-stage nitrous kit to give these engines a significant boost throughout the rev range. Fortunately, it’s never been cheaper or easier to add a turbo...
Valve Gear: Belt-driven dual overhead cams, 4 valves per cylinder, variable timing and lift
92-96 versions use closed-deck blocks but FRM liners were used in 94-96 while the 97-01 versions used open-deck blocks with FRM liners.
H22a
Found in:
1991-1996 JDM Prelude Si
1997-2001 JDM Prelude SiR
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp) @ 6,800 rpm
Torque: 161.5 ft·lbf (218.96 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a
Found in:
1997-2001 JDM Prelude SiR
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp) @ 6,800 rpm
Torque: 161 ft·lbf (218 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a
Found in:
1997-2001 JDM Prelude SiR S-Spec
1997-2001 JDM Prelude Type S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 220 PS (162 kW; 217 hp) @ 7,200 rpm
Torque: 163 ft·lbf (221 N·m) @ 6,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Red.
H22a
Found in:
1998-2002 Accord Euro-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 220 PS (162 kW; 217 hp) @ 7,200 rpm
Torque: 163 ft·lbf (221 N·m) @ 6,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Red.
H22a
Found in:
1994-1997 JDM Accord SiR
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 190 PS (140 kW; 187 hp) @ 6,800 rpm
Torque: 152 ft·lbf (206 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a1
1992-1996 USDM Prelude VTEC
1992-1996 CDM Prelude SR-V
1992-1996 ADM VTi-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 × 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 190 PS (140 kW; 187 hp) @ 6,800 rpm
Torque: 158 ft·lbf (214 N·m) @ 5,500 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Closed Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.8 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a2
1992-1996 EDM Prelude 2.2i VTEC
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 185 PS (136 kW; 182 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Valve Cover: Black.
H22a3
Found in:
1996 VTEC model in various countries around the world denoted with regional code KU.
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: ?
Torque:?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H22a4
Found in:
1997-2001 USDM Prelude Base and Type-SH
1997-2001 CDM Prelude Base, Type-SH and SE
1997-1998 ADM Prelude VTi-R and VTi-R ATTS
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87mm/3.425 x 90.7mm/3.570
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp) @ 7,000 rpm
Torque:156 ft·lbf (212 N·m) @ 5,250 rpm
Valve Configuration: DOHC, 16 valves, VTEC
Type: Open Deck.
Comp. Height: 31.0mm/1.221
Deck Height: 219.5mm/8.643
Head CC: 53.8cc
Rod Length: 143.0mm/5.633
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:-1.8 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 55mm (1997 only = 50mm)
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H22a5
Found in:
1997-1998 EDM Prelude 2.2VTi and VTi-S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 185 PS (136 kW; 182 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H22a7
Found in:
1998-2002 EDM Accord Type-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 215 PS (158 kW; 212 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Red.
H22a8
Found in:
1999-2001 EDM Prelude 2.2VTi and VTi-S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Red.
H22z1
Found in:
1999-2001 ADM VTi-R and VTi-R ATTS
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87.0 × 90.70 mm
Compression ratio:10.6-11.0:1
Power: . It is thought to be identical to the H22A4, however, there is speculation that power was increased from 200 PS (147 kW; 197 hp) to 203 PS (149 kW; 200 hp).
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H23
The H23 is an increased-stroke, non-VTEC version of the H22, used in Japan, North America and Europe. It shares the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22.
Engine Control System: Honda Systems PGM-FI with port fuel injection
Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder
H23A
Found in:
1992-1996 JDM Ascot Innova 2.3 Si-Z
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 165 PS (121 kW; 163 hp)
Max torque: 156 ft·lbf (212 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: Open Deck.
Comp. Height: 30.5mm/1.203
Deck Height: 219.5mm/8.643
Head CC: 50.0cc
Rod Length: 141.5mm/5.572
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: +4.3 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 55mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H23a1
Found in:
1992-1996 USDM
1995 USDM
1992-1996 CDM
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 162 PS (119 kW; 160 hp)
Max torque: 156 ft·lbf (212 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: Closed Deck.
Comp. Height: 30.5mm/1.203
Deck Height: 219.5mm/8.643
Head CC: 50.0cc
Rod Length: 141.5mm/5.572
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume: -9.9 cc
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 34mm/1.34
Exhaust Valve Diam: 29mm/1.14
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H23A1
Found in:
1992-1996 ADM
1991-1993 ADM
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 160 PS (118 kW; 158 hp)
Max torque: 156 ft·lbf (212 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: Closed Deck.
Comp. Height: 30.5mm/1.203
Deck Height: 219.5mm/8.643
Head CC: 50.0cc
Rod Length: 141.5mm/5.572
Rod Width: 23.75mm/.935
Main Bore: 51.00mm/2.008
Pin Bore: 21.97-21.98mm/.8649-.8654
Piston Volume:
Wrist Pin Diam:22.0mm/.866
Main Bearing Width: 19.9mm/.784
Rod Bearing Width: 19.35mm/.762
Intake Valve Diam: 35mm/1.38
Exhaust Valve Diam: 30mm/1.18
Main Journal Diam: 50mm
Rod Journal Diam: 47.95mm/1.888
Valve Cover: Black.
H23a2
Found in:
1992-1996 EDM Prelude 2.3i
Bore × Stroke: ?
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 160 PS (118 kW; 158 hp)
Max torque: 154 ft·lbf (209 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H23a3
Found in:
1993-1995 EDM Accord 2.3i SR
1992-1996 EDM Rover 623 SLi, GSi, and iS
Bore × Stroke: ?
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 9.8:1
Max power: 158 PS (116 kW; 156 hp)
Max torque: 154 ft·lbf (209 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Black.
H23a DOHC VTEC
In 1998, Honda of Japan produced a rare DOHC VTEC version of the H23A engine for use in Japan only. It has been factory modified with an internal oil passage in the H23A block to operate the VTEC solenoid in the H22A head. Having the same horsepower rating as the H22A engine but it has a lower redline because it has a longer stroke than H22A. The H23A DOHC VTEC Engine has the largest displacement of the H
Found in:
1998-2002 JDM Accord Wagon SiR
1998-2002 JDM Accord Wagon AWD
Bore × Stroke: 87mm/3.425 x 95mm/3.740
Displacement: 2,258 cc (137.8 cu in)
Compression ratio: 10.6:1
Max power: 200 PS (147 kW; 197 hp) &
Max torque: 163 ft·lbf (221 N·m)
Redline: 7500rpm
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Valve Cover: Blue.
Transmissions:
97-01 Prelude SH
Part #: M2U4
1st Gear: P3.285
2nd Gear: 1.956
3rd Gear: 1.344
4th Gear: 1.071
5th Gear: 0.870
Reverse: ??
Final Drive:4.062
97-01 Prelude BASE
Part #: M2Y4
1st Gear:3.285
2nd Gear: 1.956
3rd Gear: 1.344
4th Gear: 1.034
5th Gear: 0.812
Reverse: ??
Final Drive:4.266
1992-1996 Prelude VTEC
Part #: M2F4
1st Gear: 3.307
2nd Gear: 1.950
3rd Gear: 1.360
4th gear: 1.071
5th Gear: 0.870
Reverse: ??
Final Drive: 4.266
1992-1996 JDM Prelude VTEC w/o LSD
Part #: M2A4
1st Gear: 3.307
2nd Gear: 1.950
3rd Gear: 1.160
4th gear: 1.034
5th Gear: 0.787
Reverse: ??
Final Drive: 4.266
1992-1996 Prelude VTEC w/ LSD
Part #: M2B4
1st Gear: 3.307
2nd Gear: 1.950
3rd Gear: 1.360
4th gear: 1.034
5th Gear: 0.787
Reverse: ??
Final Drive: 4.266
1992-1996 Prelude Si (JDM F22B)
Part #: M2J5
1st Gear: 3.307
2nd Gear: 1.810
3rd Gear: 1.269
4th gear: 0.966
5th Gear: 0.787
Reverse:??
Final Drive: 4.266
1992-1996 Prelude Si
Part #: M2S4
1st Gear: 3.307
2nd Gear: 1.857
3rd Gear: 1.320
4th gear: 1.034
5th Gear: 0.812
Reverse: ??
Final Drive: 4.266
1992-1996 Prelude S
Part #:M2L5
1st Gear: 3.310
2nd Gear: 1.810
3rd Gear: 1.232
4th gear: 0.900
5th Gear: 0.710
Reverse: ??
Final Drive:4.062
1988-1991 Prelude Si
Part #: ??
1st Gear: 3.166
2nd Gear: 1.857
3rd Gear: 1.259
4th gear: 0.935
5th Gear: 0.794
Reverse: ??
Final Drive: 4.062
1988-1991 Prelude
Part #: ??
1st Gear: 3.166
2nd Gear: 1.857
3rd Gear: 1.222
4th gear: 0.906
5th Gear: 0.742
Reverse: ??
Final Drive: 4.062
1998-2001 JDM Accord Type-R
Part #: U2Q7
1st Gear: 3.307
2nd Gear: 2.090
3rd Gear: 1.481
4th gear: 1.071
5th Gear: 0.870
Reverse: ??
Final Drive: 4.266
1998-2001 EDM Accord Euro-R
Part #:T2W4
1st Gear: 3.285
2nd Gear: 2.090
3rd Gear: 1.481
4th gear: 1.071
5th Gear: 0.812
Reverse: ??
Final Drive: 4.266
1994-1997 Accord DX/LX
Part #: P2A5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.903
5th Gear: 0.685
Reverse: 3.000
Final Drive:4.062
1994-1997 Accord EX
Part #: P2U5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.933
5th Gear:0.685
Reverse: 3.000
Final Drive: 4.062
1994-1997 Accord LX/EX Wagon
Part #: P2A4
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.903
5th Gear: 0.685
Reverse: 3.000
Final Drive: 4.062
1994-1997 Accord DX/LX
Part #: P2A5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.903
5th Gear: 0.685
Reverse: 3.000
Final Drive: 4.062
1994-1997 Accord EX
Part #: P2U5
1st Gear: 3.307
2nd Gear: 1.809
3rd Gear: 1.185
4th gear: 0.933
5th Gear: 0.685
Reverse: 3.000
Final Drive: 4.062
Swap Info:
General Honda Swap Information
http://honda-tech.com/showthread.php?t=878010
Just swapped and it won't start!
http://www.honda-tech.com/showthread.php?t=970610
ITR vs. H22 Swap
http://honda-tech.com/showthread.php?t=626892
B- vs H- vs D-Series Weight Arguments Settled By Scale
http://honda-tech.com/showthread.php?t=684550
Rumors or Truth.. is an H22 to heavy to swap?
http://honda-tech.com/showthread.php?t=362984
H22 into Civic EG/EK
http://www.honda-tech.com/showthread.php?t=650329
H22 into EF
http://www.honda-tech.com/showthread.php?t=1898036
H22 into a DA
http://forums.g2ic.com/showthread.php?38801-H22-in-a-G2
H22 into DC
http://www.honda-tech.com/showthread.php?t=460871
H22 into a CB/CD
http://www.modified.com/tech/0311scc...wap/index.html
H22 into an EM2
http://honda-tech.com/showthread.php?t=2483112
How to Boost Faq:
https://www.civicforums.com/forums/2...ml#post4518610
H23a head on F22a block DIY:
https://www.civicforums.com/forums/2...22a-block.html
Valve Cover Colour Variations:
02-14-2011
#2
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this one deserves a sticky too 
02-14-2011
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Updated with transmission and boost info!
Please, if anyone has anything has something to add let me know.
Please, if anyone has anything has something to add let me know.
03-19-2011
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sticky or bump this to the top too 
08-03-2011
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Re: H-Series Engine Specifications, Swap Guides and Faq.
Hey im new to hondas ive had many muscle cars... But i hav a 95 civic 2 door with a 99 honda prelude h22 (jdm) wih an h series tranny nd i keep going thru shift cables im on my second set nd thrre trashd im orderim a new set but i had blow this money any solutions to my cable problems... They keep being stretched out only 2nd 4th nd reverse no 1st 3rd 5th gears. Pm me please
08-03-2011
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H22 powred coup
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Id also like to throw a shot on it, its making 205 hp nd 165 tq all na stock h22 hks exhaust straight pipe nd custom cold air intake. Whats yalls opinion
08-03-2011
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A shot of nitrous?
Go for it, just don't go large than a 60hp nozzle.
The first 220hp is pretty easy on an h22, after that it becomes difficult.
Go for it, just don't go large than a 60hp nozzle.
The first 220hp is pretty easy on an h22, after that it becomes difficult.
08-04-2011
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Yea i was thanking like a a 50 shot... I just dont know how much of a diffrence it would make? I know on my last two stangs nos was hp under a switch... But i was running 150 shots. But ive heard that a50 on a fwd makes a huge diffrence. I shaved a layer off the hea gasket its running 11:1 compression or if i should just do an/a build?
06-28-2015
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Hey Mindbomber, I know your post is from eons ago, but it is still of interest to many Prelude lovers. Well done on a pretty mean collation of info'.
The Aussie H22Z1 seems to bring everyone undone. I don't know why there is so little info' available on it. I owned (no longer have it), a 1999 VTi-R, ATTS, BB6, H22Z1 Prelude and as I bought it new, stock standard, I can say that it came with a red rocker cover. I also know that only particular models with the H22Z1 came with a red rocker cover here in Australia. The triptonic models together with the manuals with no ATTS had a black rocker cover. So ... only 1999 onwards had the H22Z1 block and only those with ATTS, (only ever 5 speed manuals), came with the red rocker cover - occasionally referred to as the 'R' type here in Australia amongst enthusiasts, although there is no such thing officially - because they were said to be identical to the motor in the European Accord 'R' Type - the H22a7.
It makes sense that Honda's very last three editions of the H22 engine with the higher power and the higher compression ratio all had the same coloured - red - rocker cover as they did, namely the H22a7, H22a8 and the higher powered H22Z1.
As for the actual and accurate Horse Power of the H22Z1, I have been given several numbers, ranging from 197 to 203 HP - which you quote - up to as high as 220 HP, (which I doubt), and which the 'S' type in Japan put out. I cannot verify it, but relying on a good source and a knowledgeable Honda mechanic, I tend to accept that the ATTS models between 1999 & 2001 with the H22Z1 block and exported to the Australian domestic market have a power output of 212 HP, equal to the European Accord, type 'R'.
I see that you are one of the few who got the compression ratio right! It is mostly quoted starting at 10.0, but the ATTS H22Z1 with the higher HP also shared the higher compression ratio of the H22a7 and a8 - probably the reason all three editions had the red rocker cover.
Another thing worth noting - In Australia, at least - my 1999 ATTS tacho red-lined at 7,200 rpm, whereby the non-ATTS models here red-line at 7000 rpm, which is another reason why I believe that the Honda specialist mechanic could be right in saying that the power output is higher than 203 HP for theAustralian ATTS model.
Nowadays, the dealerships in Australia don't seem to have a clue. If anyone can obtain the full specs for the H22Z1, perhaps from Honda itself in Japan, then a lot of Aussie Lude owners would be grateful. I have added a suggested amendment to your information re-quoted below:
H22a7
Found in:
1998-2002 EDM Accord Type-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 215 PS (158 kW; 212 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: cylinder, aluminum block and head
Valve Cover: Red.
H22a8
Found in:
1999-2001 EDM Prelude 2.2VTi and VTi-S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: cylinder, aluminum block and head
Valve Cover: Red.
H22z1
Found in:
1999-2001 ADM VTi-R and VTi-R ATTS
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87.0 × 90.70 mm
Compression ratio:10.6-11.0:1
Power: . It is thought to be identical to the H22A4, however, there is speculation that power was increased from 200 PS (147 kW; 197 hp) to 203 PS (149 kW; 200 hp).
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: cylinder, aluminum block and head
Valve Cover: Black.
***I would add this qualifier, Mindbomber, to the Valve Cover Spec for the H22Z1: (Some of the models had red rocker covers - possibly only those with ATTS from 1999 onwards)
The Aussie H22Z1 seems to bring everyone undone. I don't know why there is so little info' available on it. I owned (no longer have it), a 1999 VTi-R, ATTS, BB6, H22Z1 Prelude and as I bought it new, stock standard, I can say that it came with a red rocker cover. I also know that only particular models with the H22Z1 came with a red rocker cover here in Australia. The triptonic models together with the manuals with no ATTS had a black rocker cover. So ... only 1999 onwards had the H22Z1 block and only those with ATTS, (only ever 5 speed manuals), came with the red rocker cover - occasionally referred to as the 'R' type here in Australia amongst enthusiasts, although there is no such thing officially - because they were said to be identical to the motor in the European Accord 'R' Type - the H22a7.
It makes sense that Honda's very last three editions of the H22 engine with the higher power and the higher compression ratio all had the same coloured - red - rocker cover as they did, namely the H22a7, H22a8 and the higher powered H22Z1.
As for the actual and accurate Horse Power of the H22Z1, I have been given several numbers, ranging from 197 to 203 HP - which you quote - up to as high as 220 HP, (which I doubt), and which the 'S' type in Japan put out. I cannot verify it, but relying on a good source and a knowledgeable Honda mechanic, I tend to accept that the ATTS models between 1999 & 2001 with the H22Z1 block and exported to the Australian domestic market have a power output of 212 HP, equal to the European Accord, type 'R'.
I see that you are one of the few who got the compression ratio right! It is mostly quoted starting at 10.0, but the ATTS H22Z1 with the higher HP also shared the higher compression ratio of the H22a7 and a8 - probably the reason all three editions had the red rocker cover.
Another thing worth noting - In Australia, at least - my 1999 ATTS tacho red-lined at 7,200 rpm, whereby the non-ATTS models here red-line at 7000 rpm, which is another reason why I believe that the Honda specialist mechanic could be right in saying that the power output is higher than 203 HP for theAustralian ATTS model.
Nowadays, the dealerships in Australia don't seem to have a clue. If anyone can obtain the full specs for the H22Z1, perhaps from Honda itself in Japan, then a lot of Aussie Lude owners would be grateful. I have added a suggested amendment to your information re-quoted below:
H22a7
Found in:
1998-2002 EDM Accord Type-R
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 215 PS (158 kW; 212 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: cylinder, aluminum block and head
Valve Cover: Red.
H22a8
Found in:
1999-2001 EDM Prelude 2.2VTi and VTi-S
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: 200 PS (147 kW; 197 hp)
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: cylinder, aluminum block and head
Valve Cover: Red.
H22z1
Found in:
1999-2001 ADM VTi-R and VTi-R ATTS
Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: ?
Compression ratio:10.6-11.0:1
Power: Displacement: 2,157 cc (131.6 cu in)
Bore and Stroke: 87.0 × 90.70 mm
Compression ratio:10.6-11.0:1
Power: . It is thought to be identical to the H22A4, however, there is speculation that power was increased from 200 PS (147 kW; 197 hp) to 203 PS (149 kW; 200 hp).
Torque: ?
Valve Configuration: DOHC, 16 valves, VTEC
Type: cylinder, aluminum block and head
Valve Cover: Black.
***I would add this qualifier, Mindbomber, to the Valve Cover Spec for the H22Z1: (Some of the models had red rocker covers - possibly only those with ATTS from 1999 onwards)
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