Ok heres the situation. In my 2000 Civic si with the following modifications i put down 160.9 HP and 102.3 TQ. : AEM Intake, Greddy Header (2.25), Stock Cat, Greddy Exhaust(2.25), AEM Pulleys, Fuel Rail, FPR set at 39, Apexi VAFC (Tuned), Clutchmasters clutch and flywheel.

I put the motor in a 96 4-door with the following modifications and put down 143.6 HP and 101 TQ. Aem Intake, JDM DC Header, 2.5 Test Pipe, Type one b-pipe, Spoon Rear, Fuel Rail, AEM Pulleys, FRP set at 38, V-AFC(tuned) clutchmasters clutch and flywheel. OBD-1 Conversion with a chipped p28. (Kenji) Ran a compression test on all 4- cylinders and check out at 200 on all 4 cylinders. did a leak down test, everything is fine. Checkedall basic problems everything was fine. Can ANYONE please explain this. The only thing i can think of is if Kenji chipped my ECU Wrong. Im putting a p72 in it tonight to see if it makes a difference. Does larger exhaust present a problem without a built motor! PLEASE HEP! Oh yeah to slim down the variables, it was on the same dyno and the temp was pretty much the same.


[Modified by who00knows, 7:49 AM 1/31/2003]

 

Different cars will have different power loss to the wheels, especially manual vs. auto tranny, etc.

 

How long ago was the first dyno at? Did you do a basic tuneup after the install? Running the right fuel? I would think that a larger exhaust/lack of backpressure would effect the torque a lot more than the HP.

 

Same tranny....same Wheelbase..everything. so........

 

How old is ur ignition system (spark plugs, plug wires, distibutor)? This will play a part

 

plugs have around 3000 miles on em. wires are about 6 months old. and distributor is from my si. It was a 2000. Had 60k on it. This has to be something more than plugs or type of gas. this is a 20hp loss. thats a big minus.


[Modified by who00knows, 10:27 AM 1/31/2003]

 

ttt

 

same ecu was used in both cars?

 

no. It was a stock ECU on the si. My new car ( same motor ) has a chipped p28 by kenji. ( obd1 conversion)

 

given that the VAFC (tuned) had the same settings, I suspect timing (either ignition or camshaft) could be off.

 

The ECU is the most likely problem. It's the only thing that changed that could cause a 17hp drop.

 

does the car feel slower on the road?

 

nope, the car feels alot faster. I checked all the timing and everything soo....im assuming its the ECU.

 

i find it hard to believe that you were putting out 160hp to the wheels with only bolt ons which is the listed CRANK hp numbers for that car.

 

..then its the dyno, or the dang chip. I hate chips

 

yup, he put down 160 to the wheels...helped tune it myself...

the car also ran 15 flat quarter mile, full interior, with drag radials

mike, shoulda bougta nissan!

 

Did you swap the FUEL PUMP too?

 

yup have the Fuel Pump that jackson racing offers. I put in a GSR ecu yesterday. I got a feeling it is the ECU. It dumps way to much fuel.