Disappointment again at Famoso

Phimosis · 07-24-2010, 10:28 PM

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. :-(

Trips · 07-24-2010, 10:35 PM

You may want to try some cheater dot approved slicks? Stock street tire are not very good unless you lower the tire pressure to around 28psi for them to bite.

Phimosis · 07-24-2010, 10:38 PM

Front psi was 38, rears were 26.

that's with a 305/35/19 Bridestone RE11.

Trips · 07-24-2010, 10:47 PM

If you're putting out a lot more power than stock? I would look for some cheaters slicks for sure. Tracking is so subjective that even with the right conditions, wrong tires or air pressure or rt at the tree will all play a factor, keep playing around with what you have, and make minor changes and keep track of the changes, and you'll find what combo works best.

Windex_ · 07-24-2010, 11:33 PM

I ran the best track times I ever have at famoso (12.5@113). The only problem I REALLY have with famoso is track prep. For instance at irwindale I cut a consistent 1.7-1.8 60' spraying 100 shot out of the hole.. I went 2.1 60' at famoso which is 1/10th off of the FIRST time I ever ran the car and 2.2 when I was so nervous I thought I was gonna pee down my leg. I achieved these times on hankook v12's. What I did to make sure I got it right was, I went to a local street racing spot where a load of rubber has been layed down, and did the same burnout I would at the track and launched the car, let it cool down and tried again. Dropping .5psi at a time, till I found the "sweet spot" which cold was 22.5psi after a burnout was 26.2psi, I dead hooked every time.

Trips · 07-24-2010, 11:38 PM

Quote:

Originally Posted by Windex_

I ran the best track times I ever have at famoso (12.5@113). The only problem I REALLY have with famoso is track prep. For instance at irwindale I cut a consistent 1.7-1.8 60' spraying 100 shot out of the hole.. I went 2.1 60' at famoso which is 1/10th off of the FIRST time I ever ran the car and 2.2 when I was so nervous I thought I was gonna pee down my leg. I achieved these times on hankook v12's. What I did to make sure I got it right was, I went to a local street racing spot where a load of rubber has been layed down, and did the same burnout I would at the track and launched the car, let it cool down and tried again. Dropping .5psi at a time, till I found the "sweet spot" which cold was 22.5psi after a burnout was 26.2psi, I dead hooked every time.

Nice.

Windex_ · 07-25-2010, 12:17 AM

and what I meant to say with that whole post lol is try different things and see what works for you.

I give you my 700th post with good luck!

chuckd05 · 10-18-2010, 07:15 PM

that DA is awful... get a 300-400 DA and your time should improve significantly but even still I would assume you should go MUCH quicker.

Z eliminator · 10-18-2010, 07:47 PM

Im going 12.8009 and my traps are 112.8. now. stock motor and bolt ons. ( stock 19 inch tires.
Im hoping to go 11.7 to 11.8 with my gtm sc.At my track there was a guy with a G 37 with a stillen Sc and he ran 13.3 before he broke his axil.

B996 · 10-18-2010, 11:05 PM

Quote:

Originally Posted by Z eliminator

Im going 12.8009 and my traps are 112.8. now. stock motor and bolt ons. ( stock 19 inch tires.
Im hoping to go 11.7 to 11.8 with my gtm sc.At my track there was a guy with a G 37 with a stillen Sc and he ran 13.3 before he broke his axil.

you got that drivers mod!

07-24-2010, 10:28 PM	#1 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 416	Disappointment again at Famoso 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. :-(

07-24-2010, 10:35 PM	#2 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	You may want to try some cheater dot approved slicks? Stock street tire are not very good unless you lower the tire pressure to around 28psi for them to bite. __________________

07-24-2010, 10:47 PM	#4 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	If you're putting out a lot more power than stock? I would look for some cheaters slicks for sure. Tracking is so subjective that even with the right conditions, wrong tires or air pressure or rt at the tree will all play a factor, keep playing around with what you have, and make minor changes and keep track of the changes, and you'll find what combo works best. __________________

10-18-2010, 07:15 PM	#8 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	that DA is awful... get a 300-400 DA and your time should improve significantly but even still I would assume you should go MUCH quicker. __________________ 09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

10-18-2010, 07:47 PM	#9 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	Im going 12.8009 and my traps are 112.8. now. stock motor and bolt ons. ( stock 19 inch tires. Im hoping to go 11.7 to 11.8 with my gtm sc.At my track there was a guy with a G 37 with a stillen Sc and he ran 13.3 before he broke his axil. __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

07-24-2010, 10:38 PM	#3 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 416	Front psi was 38, rears were 26. that's with a 305/35/19 Bridestone RE11.

07-24-2010, 11:33 PM	#5 (permalink)
Windex_ Track Member Join Date: May 2010 Location: SFV 818 LA Posts: 831 Drives: LOW N SLOW! Rep Power: 16	I ran the best track times I ever have at famoso (12.5@113). The only problem I REALLY have with famoso is track prep. For instance at irwindale I cut a consistent 1.7-1.8 60' spraying 100 shot out of the hole.. I went 2.1 60' at famoso which is 1/10th off of the FIRST time I ever ran the car and 2.2 when I was so nervous I thought I was gonna pee down my leg. I achieved these times on hankook v12's. What I did to make sure I got it right was, I went to a local street racing spot where a load of rubber has been layed down, and did the same burnout I would at the track and launched the car, let it cool down and tried again. Dropping .5psi at a time, till I found the "sweet spot" which cold was 22.5psi after a burnout was 26.2psi, I dead hooked every time.

07-25-2010, 12:17 AM	#7 (permalink)
Windex_ Track Member Join Date: May 2010 Location: SFV 818 LA Posts: 831 Drives: LOW N SLOW! Rep Power: 16	and what I meant to say with that whole post lol is try different things and see what works for you. I give you my 700th post with good luck!

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