R33 GTSt: slow 0-100 times

[Guest skip]

Predator,

Your reply quoted Guilt-Toy, who has very good 0-100 times. I think you mistook him for me?

I'm the one with the actual problem, and I have the stock standard turbo. (I now have the EBC w/11.5psi but I am yet to do any 0-100 runs with this setup).

FWIW, I timed a *slow* (14 second) 0-70kph run, comparing the AP22 result with a stopwatch - they matched quite closely (within a second). I'm quite comfortable that the AP22 is working ok.

Greg.

[dojobi]

Just a thought, but are you sure you've got your variable cam timing connected? I left mine disconnected once and with all my mods I could only get 137rwkw. Once reconnected it made 177rwkw. Basically it totally destroyed my top end and made the car feel slow when I pushed it (I never tested my 0-100), but driving around normally on the street it didn't feel too bad (only slightly slow feeling).

[dineth]

hmmmmm ye... i got a stock r33 Auto and i have done a few 6 secs 0-100's on cold days using the 1-2-D method. Dont do it all the time cos is bad for the motor, but jus to see how much i could push it. Must say im very impressed with the RB25, dont make that much noise when ya redline on cold days. Could easily hit a 100 in 2nd gear.

[Birty]

Just keep practicing, if you're worried about your car, find a nice quiet bit of private road somewhere, and do a rolling start against another similarly modded 33. I'm guessing it's just your launching though, there's a lot to it, depending on suspension, tyre pressures and the most important thing being driver skills.

Just keep testing different methods of launching i guess, find out what works best for you, i like using the sliding the clutch out slower to keep the power on that optimum level before wheel spin, but that shagged my last clutch and i havn't had my car going right where i wanna push it yet.

[Ash]

isn't max acceleration with 10% wheel spin or something?

ie. u want a little bit of wheel spin

[Guest skip]

Ok, thanks everyone.

Btw, I should mention that I have a button clutch. (sporty, not full race). It's quite a bit more savage on the takeup than the standard clutch, and I find it hard to get a good launch without excessive wheel spin.

I'll set the AP22 into continuous mode next time, to get more detail about what happens in 2nd around the redline. (i.e, it'll log g-force 100 times a second, and the data can be analysed later)

The car feels much better now without the boost staging. I understand that this is a trivial mod to do, too.

MIC33R: the cam timing cable was plugged in, however we found that the connector was loose - it came off too easily. (we replaced the plug on the cable to fix that). Just maybe something was going on there - thanks for the hint!

[Guest skip]

I did a slowish run, but gunned it in 2nd at about 70kph. Purpose was to see if the problem at redline in 2nd is repeatable. Looking at the plot, I can see that the car never made it to 100kph in 2nd gear at all! It got to about 98kph, when the rev limiter kicked in.

I suspect that the previous circa 9 second result (where I revved out 2nd) was obtained only after I slowly shifted up to third, thinking that I had already got to 100 in 2nd.

Just by the way, the 100kph mark on my speedometer is actually about 97kph. (checked with a GPS, which is very accurate for speed on the flat)

Skip.