Hey guys. First off, went back to the track on Sunday, I live in Pittsburgh and racing at the Pittsburgh Raceway Park. I still can't crack the 12's yet. 13.0 @ 109mph was the best with a 0.11 R/T. The first trial run, i ran with TC off- BIG MISTAKE! Burned em off the first 60'. I just don't get it? 05 LS2 Convertible w/ auto. with Tuner, exhaust and filters. How are other cars running in the 12's? Where should i be shifting? At what RPM's? I was under the impression that this car should run 12's stock. Right? And unfortunate event yesterday. Punctured left rear tire. Has anyone had to replace a runflat yet? Have fun. $375ea.

 

couple of things:

Yes this car can do 12s, but there are other members who have only done 13s. I dont think 13 flat is so bad for your first time. my 1st time, I got 12.81, which is not a lot faster.

you should definitely be running with TC off. If you were burning rubber the whole time, then you need to learn how to ease into the gas pedal more.

You shuld be shifting right at the redline, to maximize torque.

do you have a z51? the z51 supercar tires can be gotten on tirerack. com for 325. the non -z51 are about 265 each. However, if the puncture is not in the sidewall, you can repair them for free, at least on the supercar tires, they come with a road hazard warranty. Just make sure that whoever does them plugs AND seals the tire.

 

as stated....u dont want to just dump the clutch, you have to ease off it in a way, also def keep traction OFF!!! and as well as shifting at redline to optimise torque....

 

My first time at the Beech Bend track was last September. I turned a 12.7 at 114. I am going to Maple Grove Raceway on Friday to see what I can do at a good track.

 

Tommy you have the A4 correct. Here is how I would launch.

1. Comp mode on
2. Heat up the runflats, I know people say this will not help but trust me on this one.
3. From idle stomp it and hold on

I have quite a few launches on an A4 C5 with runcraps and I was getting low 1.8x's in the sixty foot with this technique. Expensive to heat up the runflats though, you may want to invest in some DR's.

 

Yea, i did that on my first run with the TC off. Burned up a good 60-100ft.and ended up running........a gulp........14.4. Now the next run i ran TC on-burned out and ran a 13.0. So i don't know what to do. I'm sure DR's help, but im not there yet. And whats the difference between the stock runflats on my car vs. the Z51 tires?

 

Tommy,
What was your 60' time? If you are going to get into the 12's you have to have good 60' times (1.8/7 or better). Your launch and the timing of the launch (cutting a good light) will win you many races. With your stock tires, launch the car at about 1500 RPM and then floor it. When you shift to second, do a quick shift but not a power shift because a power shift will just spin the tires. Once the car is past the 60' mark then good shifts just as you hit the red-line. This will finish the run off with acceleration. If you allow the car to hit the rev limiter, you are loosing time and acceleration. Also, if you want to run your best times, it is important to run at a good track with pleanty of track prep compound down. Some tracks don't use much prep and that lets the wheels spin easier. Lastly - practice, practice, practice.
Good luck
Bill

 

Question for the 1/4 miles guys. Will the convertible with the top up run as good of times as the coupe?

 

I think the Z51 tires are a little stickier. I can not tell you because my car has not arrived yet. LOL.

Have you tried running in Comp mode? In a C5 anyway this was a good mode to drag race in.

You need more traction it sounds like to me. Personally I would get the runflats hot once and see what happens. That is how I used to get my runflats to stick.

 

Only thing I could see affecting it would be a little more weight. Very minor effect.

 

As far as shifting I would let the auto tranny do the shifting.

 

Yes, the tires are stickier. a Z51 should beat the non-z51 by about .1 sec on 1/4 mile

 

Not true. I achieved 12.8 with a 2.13 60' as have many others.
1.7 60' should get you low 12s

 

he said its an auto, so no clutch involved.

 

I have a C6 Vert A4/3.15, same as your Z51 with the auto tranny.

Only difference is you have the stickier compound EMT tires, but I don't think they are that much stickier.

I ran a 12.57@110.67 on a 1.92 60' with the following technique.

Let your car cool down for about an hour before your 1st pass.
Engine temps in the 190s to low 200s are your goal here.

Have your tire pressures at 28# in the rear on the DIC display and your fronts at 36-38#s. My tire pressure gauge read 2# lower than the DIC.

Pull in to the waterbox and roll slightly out of it on to the moist area just after it. Do a GOOD burnout for about 5 seconds until you see some white smoke. I did this by keeping my left foot on the brake and my right foot on the accelerator. Slowly let off the brake and press down on the accelerator until the rear tires are spinning, but the car is not moving.

Pull up to the line and light both yellows.

When you get the light just NAIL it, do not tach up to 1500rpms, just nail it from idle speed. I like to keep my left foot on the brake and my right foot on the accelerator and just lift off the brake and nail the gas at the same time at the light.

LEAVE your auto in the "3" gear setting. Let it shift itself. You cannot outshift the auto tranny.

Also, keep in mind, my 1st TWO passes that day were 12.99 and 12.90, both at 107mph, the car was HOT lapped right off the street.

After a 1 hour cool down the car cranked out a 12.57@110.67 on my 3rd and final pass.

Also, turn OFF BOTH TC/AH by pressing the button in for 5-10 seconds.

I am sure I could run better with more chances, but ATCO is VERY crowded.

I hope this helps,

Howard

 

just like howard said. you should not be able to spin the tires if correctly done. normal runflats 300 wear z51 220 wear, get a 160 therm cartek fan switch by the way now that's a very good reaction time finally we no its a .000 tree

 

and WAVEBLASTER i hope you can read the.000 dont comment on what you dont know all that typing and you still didnt get it you tried very hard to be right but you were not

 

Hi guys! Yea your right it is an LED tree .000 is the best reaction time, but i had to ask at the track. I know now to run with the TC off but what is AH? And what is the difference when at the track running TC off and comp mode? whats different between them? whats the benefits here?

 

i run with traction and active handling off its 1/10th faster put rear air pressure to 25lbs cold the best time i got in the heat was 12.91 the 05 c6 z51 i have was very slow to no it runs 12.06 vararam and spacer helped the most and miles first time down my best was 13.10 if you can get to the line at 150 degrees cool night low humidity you will be in the 12.80s

 

The Vararam? whats that? a cold air induction? i heard of it just not familiar?