15.9 @ 82mph

[Gen1GT]

**** mang...I'm looking at it, and I'm still baffled. You need to get out to a 1/4 mile track and see what you can do. It looks like you're getting no traction whatsoever, but have lots of power. Maybe there was something wrong with the timing equiptment for that race too. Did you do more runs that day? What trap speeds did you get on other runs?

[neuspeedescort]

no what you need is traction. the reason is is so high spped is look at yrou 60ft time. 2.7 once you got traction you sped thru the track fast cause you had so much wheel spin.

NEUMAN

[KiddX]

my tires were pretty much bald, all of my other runs i was dumping it at about 4500rpm, i'd peel out a bit and then catch, then peel out again a bit in 2nd then catch again. i uaually got 66mph runs at 10.6-10.8. i THINK this is the run where i actually launched like i do on the street, more around 3500-4000, and i shifted at 6000rpm in every gear. every other run i would redline 1st and finish redlining in 2nd. this run i was in 3rd gear at the end.

i know it isnt a computer error because according to my other slips my car was doing 0-60 in like 10 seconds, and thats a load of bs. i really want to get back to a track and see how this all pan's out.

[Gen1GT]

no what you need is traction. the reason is is so high spped is look at yrou 60ft time. 2.7 once you got traction you sped thru the track fast cause you had so much wheel spin.

NEUMAN

Say what?

[Gen1GT]

my tires were pretty much bald, all of my other runs i was dumping it at about 4500rpm, i'd peel out a bit and then catch, then peel out again a bit in 2nd then catch again. i uaually got 66mph runs at 10.6-10.8. i THINK this is the run where i actually launched like i do on the street, more around 3500-4000, and i shifted at 6000rpm in every gear. every other run i would redline 1st and finish redlining in 2nd. this run i was in 3rd gear at the end.

i know it isnt a computer error because according to my other slips my car was doing 0-60 in like 10 seconds, and thats a load of bs. i really want to get back to a track and see how this all pan's out.

0-60 in 10 isn't right for 10.6-10.8 either. Something's wrong with their equiptment. If it's so easy to believe their 0-60 times were off, why is it so hard to believe their trap speed was off?

Also, don't drop the clutch. That's drag tire technique. Rev to 4500 and feather the clutch, keeping the wheels on the edge of traction. You want to keep the revs up where peak torque is when you launch, but you want to maintain traction too. Shift at 7300 too......

[KiddX]

0-60 in 10 isn't right for 10.6-10.8 either. Something's wrong with their equiptment. If it's so easy to believe their 0-60 times were off, why is it so hard to believe their trap speed was off?

Also, don't drop the clutch. That's drag tire technique. Rev to 4500 and feather the clutch, keeping the wheels on the edge of traction. You want to keep the revs up where peak torque is when you launch, but you want to maintain traction too. Shift at 7300 too......

im not saying their equipment is off, im saying my car can do alot better and i must not be a good driver. when i shifted at 7300 i was only pulling 66mph's, when i shifted at 6000 (i think i only did that in 1st gear) i got that 77. I THINK. i dont really remember it.

[Gen1GT]

I still think the equipment malfunctioned for that particular run. I don't see how you could be 10mph faster over the same period of time than your other runs.

Also, shifting at 6000 is not a good idea. Always shift as high as possible as you can, even if you think you're past your 'peak power'. You always make more power in a lower gear than in a higher gear, which is something people seem to always forget......example: (I'll use my peak hp figures)

G25M-R
Gear Final Drive Road Gear Road HP
3.307:1 4.105:1 13.572:1 1615hp
1.833:1 4.105:1 7.524:1 895hp
1.310:1 4.105:1 5.378:1 640hp
1.030:1 4.105:1 4.228:1 503hp
0.795:1 4.105:1 3.263:1 388hp


My car makes 108hp at 7400RPM, which is still good for 1466hp on the road in first gear. Which is still 60% than peak in second gear. My car makes more power at the road at 3500RPM(70whp) than peak in second gear.

If I shifted at 6000RPM, where I get 114whp or 1547 road hp, it would drop down to 4000RPM in second, where I'm getting 80whp, it would only be 602 road hp.

I've talked about how just leaving it in gear longer keeps revs up for more power before, but along with this, I hope it kills that myth that you should shift at 'peak power'.......run it to fuel cut...every time....

[neuspeedescort]

well run til about 7100 seems the redline kicks in at 7250. this way you have a bit of room to allow the motor to not hit revlimiter (fuel cut as you say) it you hit that it will slow you down.

NEUMAN

[91ProtegeLX]

yea I wouldnt advise running it to fuel cut unless you like a steering wheel imprint on your chest. I hit fuel cut once, while racing, I didnt realize I was at like 5700rpm's when I stomped on it, and all of a sudden BAM...steering wheel to chest....ha, didnt feel to good.

[Gen1GT]

I've hit the rev limiter plenty of times, and have never had an issue with it. It does slow you down for a fraction of a second though. Since I installed my RX7 AFM, my cars rev limit was somehow raised to 7400. Originally, the tach said 7600, but the dyno said 7400, so I went with that. But since I've done some better grounding, the tach is more accurate and reads 7400 at fuel cut.

[siamiam]

the added down force and aerodynamic wind resistance will have more of an effect on a vehicles accleration on a longer run if you compare a 1/4mile run to a 1/8th mile run.

math adds up numbers but doesnt take in to effect other variations while racing.track temps,traction,wind etc, all have more of an effect the farther you have to drive