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Old 05-30-2005, 07:02 PM   #21
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Originally Posted by Nobigspoilerz
Ranger,
When will you be tearing up Crapitol next? I'd like to come watch.

Steve
Hey Steve, I am getting ready to sell my 02 Z06, in anticpation of the arrival of my C6 Z and I put in a fresh stock clutch for whoever will be its new owners. So I want to sell the car with zero launches. Long way of saying that I won't be racing again until the new Z arrives, hoping for August.

There is a big Corvette event at Cecil County on June 18th. I plan to go watch and would be happy to hook up there.

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Old 05-30-2005, 07:08 PM   #22
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MAN, i tried these technique on my sticky RII Nittos and had 0 luck hooking up at the track and had horrible 60 ft times. Just need more seat time and find that sweet spot between letting out clutch and applying throttle, etc. Practice makes perfect....
The technique that works best for me is to (1) hold the launch rpm and don't move that right foot again until (2) the clutch foot is all the way out. THEN and ONLY THEN (3) progressively squeeze the throttle to the floor.

The bad 60' tend to come when the driver does (2) and (3) simultaneously rather than as TWO actions, separate but synchonized.

Just a thought.

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Old 05-30-2005, 07:13 PM   #23
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...Thanks again Ranger!....
Every day, but especially on this Memorial Day, thank you Dave for your sacrifices for freedom.

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Old 05-30-2005, 10:39 PM   #24
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Every day, but especially on this Memorial Day, thank you Dave for your sacrifices for freedom.

Ranger

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Old 06-07-2005, 11:23 PM   #25
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Ranger, I just printed out your launch techs for the third time over a period of time. I have a couple questions on launching on the BFG Dr. Were you using the old style in the 17" size? I am picking up my 315 30 18's in the newer tread pattern and was wondering what type of burn out and starting launch might be good. I was thinking 4500 for the launch, and a medium burn out? I do have the stock clutch in good shape and no dte or hardened shaft. My first time out with the stock tires I was able to get a 1.9x with spin launching about 2500rpm. Thanks ahead for your advice and insight. Dr Ron and any others can feel welcome to give input.
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Old 06-08-2005, 10:51 AM   #26
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Ttt
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Old 06-08-2005, 11:43 AM   #27
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Originally Posted by Robert56
Ranger, ...on the BFG Dr. Were you using the old style in the 17" size? I am picking up my 315 30 18's in the newer tread pattern and was wondering what type of burn out and starting launch might be good. I was thinking 4500 for the launch, and a medium burn out? I do have the stock clutch in good shape and no dte or hardened shaft...
Hey Robert.

I used to run the BFG 315.35.17 Comp/TA, sometimes referred to as the old tread style because it's different from the newer 315.30.18s.

With that as background, the tread compound on the two types of BFG are very similar. So, I suggest 18 psi and similar launch rpms and burnout approaches to those in my write-up on launch techniques. I'd start at 3600 and adjust from there.

With new BFG DRs, I'd suggest a very strong first burnout. Then normal ones, IAW my write-up thereafter.

Good luck and let up know how it goes.

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Old 06-08-2005, 01:49 PM   #28
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i notice you say "let the clutch out slowly rather than a slip". what is the difference, i always understand slipping the clutch to mean letting it out slowly? thx!
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Old 06-08-2005, 02:57 PM   #29
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i notice you say "let the clutch out slowly rather than a slip". what is the difference, i always understand slipping the clutch to mean letting it out slowly? thx!
Not sure to whom your question is addressed.

If you are asking me, I don't remember ever writing to let the clutch out "slowly." On the contrary, I suggest a fast release, with the pedal all the way out within the first 3-10 feet of forward movement.

Some drivers do slip the clutch A LOT to keep the revs high during the launch. I don't do that because I want my clutch to give a decent service life. Those that use a big-slip launch, get 30-60 passes per clutch. That's too few for my tastes.

I'd also argue that a big-slip launch (stock rwhp and clutch) gives neither a better 60' nor a better 330'. But opinions vary.

But for sure a big slip will wear out the clutch faster.

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Old 06-08-2005, 11:07 PM   #30
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Quote:
Originally Posted by Robert56
Ranger, I just printed out your launch techs for the third time over a period of time. I have a couple questions on launching on the BFG Dr. Were you using the old style in the 17" size? I am picking up my 315 30 18's in the newer tread pattern and was wondering what type of burn out and starting launch might be good. I was thinking 4500 for the launch, and a medium burn out? I do have the stock clutch in good shape and no dte or hardened shaft. My first time out with the stock tires I was able to get a 1.9x with spin launching about 2500rpm. Thanks ahead for your advice and insight. Dr Ron and any others can feel welcome to give input.
I was running that exact tire on ZR1 style rims. As Ranger stated, a good 1st burnout followed by burns until you see solid smoke. Try starting at like 3500rpm's and adjust (hopefully up) depending on track prep...I'd look into a hardened OP shaft & DTE brace if you plan on running frequently on the DR's. Don't ask me how I know...
Ron
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Old 06-12-2005, 10:54 PM   #31
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Great post Ranger. I've come to the same basic conclusions about launching my car. I am an old street racing guy. I got my license in 1964. I use identical techniques by way of the old school of "trial and error." Your post is superb
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Old 06-13-2005, 07:25 AM   #32
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Originally Posted by POWERTOWEIGHT
Great post Ranger....I use identical techniques by way of the old school of "trial and error."....
Thanks for your kind remarks, POWERTOWEIGHT.

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Old 12-16-2010, 07:58 PM   #33
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nice
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Old 12-17-2010, 01:49 AM   #34
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Another thread back from the dead.
Ed
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Old 12-17-2010, 06:42 AM   #35
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Another thread back from the dead.
Ed
If you were driving a car with an M6/M12 tranny rather than your automatic with a stall-converter, suspect you'd better appreciate why launch technique guidance is timeless and still worth reading.

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Old 12-22-2010, 05:00 PM   #36
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Old thread, but not dead. Taking her to the track for the 1st time

she has fresh DOT 4 castrol, and a newly installed PCV oil catch can.

I still need to take the intake manifold off and clean it since this was car ran (previous owner) without an air filter and all the blowby with the dust that went through, it must be nasty in the intake. It'll give me a good idea on what the car did before and after cleaning

Hopefully these launch techniques will help! my turbo TA was auto, and the only manual I took to the track was a 03 E36 bmw, so nowhere as near the same power.

and I can't believe I'll only get like 30-60 passes on the stock clutch!?

I'll probably just do like 2-3 passes then. and then 2-3 more when the car is done with all the fixing, and that's it for this year lol
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Old 12-22-2010, 05:21 PM   #37
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Another thread back from the dead.
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