Disappointment again at Famoso

Phimosis

I didn't bring my time slips with me (I'm at work right now), but seeing the "some of you TT guys need to stop being little girls..." thread provoked me to make this post.

I recently got my Stillen S/C installed at Stillen. I took it out for a Friday night test and tune at Famoso raceway. My car is lowered on coilovers that are way stiffer than stock. I have aftermarket sway bars and 6MT. It makes for a difficult launch.

Anyways, at a balmy 96 degrees and a DA of 3429, I started out with runs in the low 14's with either bogging the engine or lots of tire smoke and trap speed of as low as 103.5.

As the night went on and temps dropped to 87 degrees, with a DA of 2850, I will still having traction problems with 60 foot times of 2.1 and a pretty slow 13.4 et and a not too impressive trap of 107.1 mph. Really? 422whp and only 107 mph?

I let it set with hood open for roughly 30 minutes between runs. Traction control was off. Fuel was 91 octane Chevron. Shifts were at at 7,500, never hitting the rev limiter.

I guess the biggest problem is that even though it's making 422 whp at 7,500 rpm, when I do the 1-2 shift and it drops to 5,000 rpm, it's only making 270whp. The other shifts are closer ratio and it's not quite as much of a problem, but the "area under the curve" on this setup is not great.

The average of peak whp compared to whp after gear change is 346 whp



Compare that to a the curve on a C6 Corvette:

2008 Chevrolet Corvette ls3 c6 Dyno Results Graphs Hosepower - DragTimes.com

The corvette is only making 376 whp at peak, but when you shift into second and drop from 6,500 rpm to 4,650 rpm, you're still making 320 hp. I know the area under the curve is more complicated than just a simple average, but the average for the corvette is 348 whp, which is slightly higher than my 370z.

The Corvette is also lighter and the balance is like 51/49 vs (roughly) 55/45 for my 370z. Overall, the corvette launches harder, turns better times and higher trap speed.

This is a sad day. :-(