question

[outofstep]

ok i have a jdm d15b with si ecu, si tranny, vafc2, act stage3 clutch, shortram intake, headers and downpipe on my hatch
now my frined has a similar setup
he is si motor, std tranny, si ecu, act street disc , safc, cai, headers, 2.5 with muffler

specs to specs i should be the faster car right? well his car seems to pull much harder then mine, he pulls about a car length on me before i start catching up... is my exhaust holding me back? what could i do to add tourqe?

[SiZ]

You should be much faster considering he has an std tranny!
Does your car run right? VTEC is working?

[Hybrid1990crx]

Really man, with a STD tranny that car should be a snail. Maybe he just seems to pull harder because he has to shift less? I know in second gear I could get my HF up to 65.

[Hybrid1990crx]

Originally Posted by outofstep

ok i have a jdm d15b with si ecu, si tranny, vafc2, act stage3 clutch, shortram intake, headers and downpipe on my hatch

So im guessing you have the imfamous V4, since you say you have headerS.

[BLU CIVIC]

Originally Posted by Hybrid1990crx

So im guessing you have the imfamous V4, since you say you have headerS.

took my line

[SiZ]

Originally Posted by Hybrid1990crx

Really man, with a STD tranny that car should be a snail. Maybe he just seems to pull harder because he has to shift less?

Less HP to pull him, and longer gears to climb? I doubt thats the reason.

[outofstep]

could exhuast be holding me back that much? also i used the 88 si ecu, and the rev limiter cuts on around 6500-6800 and my motor is suppost to redline at 7200 i believe. could that also be the issue?

[bambam89lx]

I definitely think your car isn't running right. Do you have any CELs on? My si cuts at 7500k. Maybe u have a poor A/F ratio and ur running rich. Who tuned ur VAFC?

[outofstep]

the shop here, like it feels like it wants to go
but its being bogged down or something i think im running like +3% correction

[outofstep]

its a 88si ecu and the rev limiter is like 6500-6800 somewhere in there

[SiZ]

Have you checked your timing with a timing light?

[90civicracer]

Originally Posted by Hybrid1990crx

So im guessing you have the imfamous V4, since you say you have headerS.

Yeop its the infamous Cube design...the 2 by 2 that has become ever so popular u know, lol.

[91civichatch2571]

If you know how, you should do a compression test.

[outofstep]

we used a timing light and set the timing, its still pretty slow. how do i do a compression test?

[bambam89lx]

get a compression guage. It screws into the spark plug thread. Just remove the plug wire from the valve cover, remove the spark plug, then screw in the guage. Start the car. It will show you what compression that cylinder has. Repeat for each individual cylinder. I've also never heard of the 88 si having any different rev limiter than the 89-91. I'm pretty sure that's wrong. It's still an si. I have an 88 dx. Before I did the si swap, my 88 dx motor and ecu cut at like 7200. I don't understand why the si of the same year would have a lower rev limiter.