Yes that right..... i ran a woping 17.283 @79mph.... 60' of 2.4


now i say why? what might be wrong and dont say the driver

 

Your clutch could be slipping.

 

what tranny are you using? ZC?

 

si tranny.... clutch isnt slipping....

 

it's got to be the driver or bad launch, but with that trap speed sounds like a tired or malfunctioning motor. i ran 15.7 at 85 with a bone stock si motor in my 88 dx. now it's much faster

 

please dont say that........ i just got it put in...... could a good ol tune up fix the problem? could the timing be off?


also i ran 6 or 7 times and i got consistent 2.4-2.5 60' times.... and i raced a stock si crx that ran 16.4 all night..... i beat him to 60' everytime.... no one can really make sence of this.....


now it was my first time at the track but i dont think im that bad of a driver.... and even if i was i was running 1.5 seconds slower then i should

 

here is the stats.........

r/t - 1.024
60' - 2.502
330 - 7.200
1/8 - 11.068
mph - 63.20
1000 - 14.449
1/4 - 17.285
mph - 79.92

 

looks like your reaction time might be part of it too...what tree where you on? .500 or .400?

 

You are WAY down on MPH, you should be going around 70-75 in the 1/8. Look for the obvious, like the throttle not opening all the way, plugged cat, etc. Reaction time has NOTHING to do with your ET or speed. You're about 10mph down in the 1/8, and I'd guess about 15mph or so off in the 1/4, although I've never had mine to a 1/4 mile track. I'm going through the lights in th 1/8 at 72-73, running a 10.0-10.1 with a 2.6+/- 60 foot time here. Anyway, MPH is off, which means power is down, you'll need to figure it out, slipping clutch, throttle not opening all the way, exhaust, etc. Are you throwing any codes? Where's the base timing set?

 

your reaction time has nothing to do with your et......

 

what ecu are you running. what are your mods?

 

si ecu..... i think.... and there are zero mods... 100% stock

 

check into getting a different ECU....

The best results I had with my ZC were when running a mugen chipped PM6(crx si) ECU, which i happen to have for sale or you could check out a pm7 or pg7 ECU. That will healp a lot.

 

alright so how can i check which one i have forsure?

 

check the sticker on the side of the ecu


1) PM7 (JDM ECU) - This was the original ECU for the imported DOHC ZC. It has a speed limiter set at 112 MPH, though. How often do you hit those types of speeds, though.

2) PG7 ('89 Integra) - This is a great ECU for this engine. Some will say that it tends to make the engine run a little bit rich. Make sure you get the ECU from a 5 speed.

3) PM6 ('90-91 CRX Si) - This era of CRX ECUs have more aggressive fuel and timing curves than that of the previous years. These ECUs should be cheap and easy to find.

4) Mugen Chipped PM6 ('90-91 CRX Si) - Same as PM6 except 9K redline, no speedlimiter and PM7 Fuel curve.

 

Maybe your running an HF computer? lol Or your shifting early, what were you shifting at? I had best results at 7200, or somewhere around there with PG7. I ran a 15.8 at 84 mph in my ZC with SI tranny, and thats slow, but..

 

ok...... but how do i know which ecu is sitting in my car?

and i was shifting around 6500-7000. tires slipped from first to second and it grinded a couple of times.

 

check the sticker on the side of the ecu

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by markw &raquo;</TD></TR><TR><TD CLASS="quote">You are WAY down on MPH, you should be going around 70-75 in the 1/8. Look for the obvious, like the throttle not opening all the way, plugged cat, etc. Reaction time has NOTHING to do with your ET or speed. You're about 10mph down in the 1/8, and I'd guess about 15mph or so off in the 1/4, although I've never had mine to a 1/4 mile track. I'm going through the lights in th 1/8 at 72-73, running a 10.0-10.1 with a 2.6+/- 60 foot time here. Anyway, MPH is off, which means power is down, you'll need to figure it out, slipping clutch, throttle not opening all the way, exhaust, etc. Are you throwing any codes? Where's the base timing set?</TD></TR></TABLE>

Like he said take a look and try to findout whats up....What exhaust,what are you reving to...the si ecu wouldnt ,make you run that bad of a time I mean a 16 is a bad time but 17.2 there is deff something wrong get a new exhaust do a tune up GAS FILTER and sometimes the dizzys are **** which made my first zc rev to 5grand and take a dump do plugs and wires all that normal tune up stuff and take it on back to the track if all this wont make any diff then it is a bad motor

 

dude..your mph isnt way off its actually right on for a 17.sec pass,did you check your timing yet,what about fuel pressure,that is if you have a fuel pressure gauge,I would also make sure all the basics are covered..make sure that everything in the distributor is operating correctly.not to be rude but that 60ft time could really use some help,for every tenth you take off your 60ft you'll gain two tenths at the end of the track.

 

i'm not seeing a sticker saying what ecu? I see a upc code thing and some other groups of numbers.

 

throttle cable? could it be thats its loose? if so how can i check that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ZC88CRX &raquo;</TD></TR><TR><TD CLASS="quote">throttle cable? could it be thats its loose? if so how can i check that?</TD></TR></TABLE>

Have a buddy floor it while the car is OFF, and see if the throttle plate is opening all the way. As for the ECU code, tells us ALL the digits off of the side of the ECU.

 

Is the ECU throwing any codes? Something isn't right. I can't imagine you're that bad of a driver. I'd personally do the following... Check to see if the ECU is throwing codes, and be sure it is either an SI, ZC, or 88-89 teg 5 speed ECU. Second I'd check the cam timing. If you didn't do the work yourself, you'd have no idea if it is correct. The arrows on the cam gears should point SLIGHTLY TOWARD each other. The up arrows will not be parellel when the motor is at TDC. They'll basically look like this / \.... only not near that extreme. I can't tell you how many times I've seen people line them up so both tilt slightly forward. You can remove the valve cover and put something through the cams to be sure they're in the right place. Next I'd check the ignition timing although it is very unlikely that would cause this poor of a time. After that, fuel pressure, throttle cable (there should be slack, just make sure it opens up the whole way when floored). If fuel pressure, ignition timing, cam timing, etc end up being ok, then a compression test may tell you something. Its possible you got a bad motor. Other options would be a clogged cat, crappy small aftermarket exhaust, oversized wheels, brake hung up, heavy 'system' in trunk, anchor dragging, you weigh 600lbs and aren't telling us, etc.

 

checked ecu.... its a pm6

checked ecu..... no codes

checked throttle cable..... has a tiny bit of slack at the end (which i think is normal?)