Dyno run for 2003 factory EX
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From: Westminster, California, US
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gearing does matter.. it applies how much from engine is going to wheel...
in different gears your car is going to put out diff. amount of hp.
hence u gotta switch gear to get to higher speed.. well, not really but yeah. lol.
in different gears your car is going to put out diff. amount of hp.
hence u gotta switch gear to get to higher speed.. well, not really but yeah. lol.
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From: Austin, TX
Rep Power: 0 At the time I tune the engine, I take a look at the camshaft. From my observation, the camshaft has 4 lobes for each cylinder. 1 for exhaust, 1 regular intake, 1 low profile intake, it also has 1 wide-open intake(the profile is somewhat higher than the regular one). I found the information about VTEC and it says VTEC-E only has 2 lobes for intake. I am not sure how it works out, but after I installed the Injen CAI and AEM pulleys, when VTEC kicks in, the difference can be felt at 2 different points...At around 2600 after the VTEC indicator on, and at 4500 another pull there. So what's the point of this engine?
Last edited by 82801BA; Feb 3, 2004 at 12:14 PM.
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Rep Power: 0 As a follow up(I don't know who will read this, probably no one)
D17A2 is a VTEC-E, concluded.
Here's the comparison between the 2 generation engines:
7th gen
End Play: 0.05-0.15mm
Camshaft-to-holder oil clearance: 0.050-0.089mm
Total Runout: 0.03mm
::: D17A2 Lobe Height :::
VTEC intake primary: 38.604mm
VTEC intake secondary: 32.848mm
VTEC exhaust: 38.784mm
::: D17A6 Lobe Height :::
VTEC intake primary: 38.427mm
VTEC intake secondary: 32.193mm
VTEC exhaust: 38.784mm
::: D17A1 Lobe Height :::
Intake: 35.299mm
Exhaust: 37.281mm
6th gen
::: D16Y8 Lobe Height :::
VTEC intake primary: 36.778mm
VTEC intake secondary: 37.065mm
VTEC mid: 38.274mm
VTEC exhaust: 38.008mm
::: D16Y5 Lobe Height :::
VTEC intake primary: 38.427mm
VTEC intake secondary: 32.193mm
VTEC exhaust: 38.784mm
::: D16Y7 Lobe Height :::
Intake: 35.299mm
Exhaust: 37.281mm
I wonder how come the D17A2 does not outperform D16Y8.
Questions rising here:
Even though D17A2 is VTEC-E, the height of the lobe opens further than D16Y8, but horsepower remains the same? And probably D17A2 is even slower?
Does the low engagement point of the VTEC-E(2500-3300) actually affects performance(If at 4500rpm both D16Y8 and D17A2 should operate the same, with D17A2 having some higher opening as an advantage therotically, when all 16-valves are opened, it should run better than the lower profile D16Y8)?
-The idea is, I had an H-series VTEC before and I tried to kick the VTEC in at 3000 rpm it actually lost all the performance, even at top-end. In another word, the low opening rpm of hi-cam actually causes the engine to respone slower(Acura.com shows the demo to compare tractor and race car, which tractor opens lo and race car opens high all time. You lose torque and horsepower if using high-cam at low rpm) True?
Is the the air/fuel mixture ratio actually playing the trick in D17A2 to lower the performance(if so, then AFC should do some work)?
I am not going to run turbo because I am always driving on highways for 320 mile every week(turbo sucks my money if I add it).
D17A2 is a VTEC-E, concluded.
Here's the comparison between the 2 generation engines:
7th gen
End Play: 0.05-0.15mm
Camshaft-to-holder oil clearance: 0.050-0.089mm
Total Runout: 0.03mm
::: D17A2 Lobe Height :::
VTEC intake primary: 38.604mm
VTEC intake secondary: 32.848mm
VTEC exhaust: 38.784mm
::: D17A6 Lobe Height :::
VTEC intake primary: 38.427mm
VTEC intake secondary: 32.193mm
VTEC exhaust: 38.784mm
::: D17A1 Lobe Height :::
Intake: 35.299mm
Exhaust: 37.281mm
6th gen
::: D16Y8 Lobe Height :::
VTEC intake primary: 36.778mm
VTEC intake secondary: 37.065mm
VTEC mid: 38.274mm
VTEC exhaust: 38.008mm
::: D16Y5 Lobe Height :::
VTEC intake primary: 38.427mm
VTEC intake secondary: 32.193mm
VTEC exhaust: 38.784mm
::: D16Y7 Lobe Height :::
Intake: 35.299mm
Exhaust: 37.281mm
I wonder how come the D17A2 does not outperform D16Y8.
Questions rising here:
Even though D17A2 is VTEC-E, the height of the lobe opens further than D16Y8, but horsepower remains the same? And probably D17A2 is even slower?
Does the low engagement point of the VTEC-E(2500-3300) actually affects performance(If at 4500rpm both D16Y8 and D17A2 should operate the same, with D17A2 having some higher opening as an advantage therotically, when all 16-valves are opened, it should run better than the lower profile D16Y8)?
-The idea is, I had an H-series VTEC before and I tried to kick the VTEC in at 3000 rpm it actually lost all the performance, even at top-end. In another word, the low opening rpm of hi-cam actually causes the engine to respone slower(Acura.com shows the demo to compare tractor and race car, which tractor opens lo and race car opens high all time. You lose torque and horsepower if using high-cam at low rpm) True?
Is the the air/fuel mixture ratio actually playing the trick in D17A2 to lower the performance(if so, then AFC should do some work)?
I am not going to run turbo because I am always driving on highways for 320 mile every week(turbo sucks my money if I add it).
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Rep Power: 0 Re: Dyno run for 2003 factory EX
Originally posted by 82801BA
I have run a dyno on my factory EX... The max power occured at 6250rpm and rated 105.2HP and torque at around 4700rpm rated 100.8lb-ft... What does it mean?
I have run a dyno on my factory EX... The max power occured at 6250rpm and rated 105.2HP and torque at around 4700rpm rated 100.8lb-ft... What does it mean?
-joe
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From: Jacksonville, Fl
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The D17 is essentially a D16, other than a larger crank, headers, ignition, and some little vtec mods. Bottom line...it's a weak engine and needs F/I or to be swapped to be worth something.
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Rep Power: 339 Originally posted by lid6662
lol
WannaBFast Was that on ur stock ex???
lol
WannaBFast Was that on ur stock ex???
now with my vafc2 tuned, its closer to 120hp and like 110ft/lbs torque
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Rep Power: 0 Can anybody confirm that the V-AFC2 WILL WORK WITH OUR CAR? I am very confused because some saying that it works for '01 only. I have a 03 and the shop tell me(I know the ower for a very long time) that V-AFC2 will NOT work in 03 car. But I see no difference between 01 and 03 therefore not sure.
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Rep Power: 339 it will work with all vtec cars except ones with lean burn...
the silencer helps with the backpressure.. and for most of us, backpressure = torque... if you are boosting, backpressure = bad
but its a 2 fold thing... u get more torque, then theres a restriction for hp
the silencer helps with the backpressure.. and for most of us, backpressure = torque... if you are boosting, backpressure = bad
but its a 2 fold thing... u get more torque, then theres a restriction for hp
Last edited by WannaBFast; Feb 27, 2004 at 12:18 AM.
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From: Gainesville, Ga.
Rep Power: 0 It works on all the models...You just have to print out these instructions that Fly posted and take it to the shop..Apexi left out a wire hook-up on our instructions for the VTM wire.VAFC II Fix If you already have it hooked up, you should be able to fix it yourself..It's just one wire
Last edited by cwick187; Feb 27, 2004 at 08:40 AM.
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Rep Power: 0 I did dyno again last saturday after I installed the Injen RD CAI, DC Ceramic Header, Tru-Power pulleys, and adjusted the cam gear.....Here's what I got.......(@#$%!)
The blue line is the factory cam gear with pulley header and cai
The red one is 2 deg advanced(for 2 deg retard, I get 117hp)
Nothing much changed except 9 hp and 7lb-ft torque gained since my first dyno......
The blue line is the factory cam gear with pulley header and cai
The red one is 2 deg advanced(for 2 deg retard, I get 117hp)
Nothing much changed except 9 hp and 7lb-ft torque gained since my first dyno......
Last edited by 82801BA; Mar 9, 2004 at 12:09 AM.
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Rep Power: 339 Originally posted by clean2k1civ
the v tec cant be kickin in!!!
the v tec cant be kickin in!!!
82801BA's is a good stock looking power curve, but its slightly higher due to the mods...
