DefiantOne

Ok, hi i'm new to the forums. I have owned a 92 civic hb in the past but i just purchased a 2001 civic ex coupe.

I do have a question about the car, i read on the internet that the ex coupe came standard with vtec-e, is that a good or bad sign if i'm directed more into the performance spectrum of the motor rather then fuel consumption, or does it just not matter? Suprisingly my civic hb was a vx with vtec-e also, it didn't take to well to the the sohc vtec ecu i threw at it. My question is that with this newer motor design can it changed over just by adding a vtec ecu and not a vtec-e?

DefiantOne

damn 48 views and no one can tell me if a ex sedan ecu would work in my ex coupe

jimmym86

I'm no expert, but I wasn't aware/know much of the vtec-e in the 7thgens...I know the vtec-e was more developed for fuel economy over power, when compared to the origonal vtec design. If I were you I would be happy you have the ex instead of the dx and lx models without vtec. If you were only looking for power, then a search would probably clue you that these motors aren't built for power, let along making them powerful with bolt-ons. K20 swaps are pricey, but the most popular method of getting power out of the EM2s.

And I don't know the answer to your question about putting a sedan ECU, in your coupe.

Usually alot of the common vtec questions don't get a prompt answer, and with you including that you are wanting adding power to your D17 and being a newbie...most people would pass until you searched and found your answer.

I don't know if this helps, but thought I would post something...

D17A1
Found in:
2001-2005 Honda Civic DX/LX/VP
Displacement : 1668 cm³
Bore and Stroke : 75 mm X 94.4 mm
Compression : 9.5:1
Power : 115 hp (86 kW) @ 5600 rpm & 110 ft·lbf @ 4500 rpm
Valvetrain : SOHC
Fuel Control : OBD-2 MPFI
A good winter beater.


D17A2
[[VTEC#SOHC VTEC|VTEC--24.13.170.187 (talk) 03:57, 1 April 2008 (UTC)]]
Found in:
2001-2005 Honda Civic EX
2001-2005 Honda Civic Si (Canada only)
2001-2005 Acura 1.7 EL (Canada only)
Displacement : 1668 cm³
Bore and Stroke : 74.98 mm X 94.4 mm
Compression : 9.9:1
Power : 127 hp @ 5800 rpm & 114 ft·lbf @ 4800 rpm
Valvetrain : SOHC VTEC (Single Cam)
Fuel Control : OBD-2 MPFI

Envy

iTrader: (1)

VTEC-Economy. Thats what it stands for. Its a SOHC, so theres no switchover to a performace camshaft. And the ECU's are for the most part interchangeable, but you must match the transmission and engine code.

ie d17a2 with manual ecu cannot be used in a d17a2 with auto

DefiantOne

thanks, i'm fairly familiar when it comes to hondas i had a eg that i swapped a zc/vtec in. My question i was going towards was, if it would work, basically make it so the vtec does not kick in so early, so per say vtec=e kicks in at low rpm, can it be pushed back to run further down in the rpm like the sedan with standard vtec.

ok say i look up a cam say from crower which they make on for the ex coupe and sedan with the same d17a2 engine code, internals of the head should be the same correct or am i wrong? and if so, would there be a problem swapping over to the ex sedan ecu? they possibly could not be the same ecu.

this is some what of an experiment pretty much. to see if its cost effective to get a little bit better performance without having to reprogram or rechip or buy a piggyback control system for vtec.

Envy

iTrader: (1)

if you wanna change the VTEC changover, get engline managemnt. the sedans vtec and the coupes vtec are the same. idk why you would wanna even switch the ecu's.