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Bracket racing slower cars

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Old Jun 6, 2005 | 03:06 PM
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Default Bracket racing slower cars

You've just done your burnout, you staged at the light, the car next to you leaves, but you've have to wait a second and a half before your green light. So, before you can launch your tires have cooled OFF! and you've got NO GRIP!

So what's the best thing to do?

Practice launching w/o doing a burnout?

Just leave your race tires at home?
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Old Jun 6, 2005 | 03:16 PM
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i wouldn't know- most of the time i am that guy you are racing

anyway- i have never really had a problem with that- if i have a problem with traction it's because of something i did or didn't do- not because i had to wait an extra second to launch. maybe do a little bit longer of a burn out?
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Old Jun 6, 2005 | 03:51 PM
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There is virtually no cooling by the tires in that 1-2 seconds. If you want to test that, borrow a heat gun and test them.
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Old Jun 6, 2005 | 04:02 PM
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I very many cases, I'm the slower guy, but I've never had a problem being the faster guy either.
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Old Jun 6, 2005 | 04:05 PM
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I'm using my autocross tires, old ones at that, if it makes a difference.
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Old Jun 6, 2005 | 04:17 PM
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I bracket raced for years and never had an issue with this at all. I even spotted guys 6+ seconds when running special DOT only brackets.
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Old Jun 6, 2005 | 05:01 PM
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What kinds of short time and ETs are you pulling on a good launch?
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Old Jun 6, 2005 | 07:03 PM
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Originally Posted by BrianCunningham
I'm using my autocross tires, old ones at that, if it makes a difference.
get some drag radials you'll see an incredible difference ... My Kuhmo autocross tires just spin and spin but my Nitto Drag tires hook every time (and break axles)
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Old Jun 6, 2005 | 09:35 PM
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I think your right

Originally Posted by 65Z01
What kinds of short time and ETs are you pulling on a good launch?
Well at <cough> 2700ft<cough> LACR my best run was a 14.0 @ 100mph, which corrected should be 13.5 @ 103

My best 60ft was a 1.90, but I got a lot of 2.4's and 2.6's

When they hooked it was weird caught at 1st, then they slipped, then they caught

I've got the power, I just can't get it to hook!
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Old Jun 6, 2005 | 10:06 PM
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OK, I pull those kinds of numbers (uncorrected) on a tight track, on GY Eagles with only a dry hop burn out and running about 30psi. If the track goes away I have to ease into the throttle to avoid spin.

As mentioned, the problem may be the auto-X tires are not right for the strip. Those tires are designed with a stiff sidewall for lateral stability, whereas a drag tire wants sidwall flex to promote hookup.

Next time out on those tires, try a light dry burn out and line up in the tracks of the slick tire cars with around 30psi or whatever gives a flat foot print.
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Old Jun 6, 2005 | 11:25 PM
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Lower your rear when you go to the strip. If you've ever seen a car on scales (one under each wheel) you wouldn't believe what kind of difference in the weight bias can be achieved with small adjustments.
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Old Jun 7, 2005 | 12:00 AM
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When you say to lower the rear end, how much? 1/2", 1" or what has been your experience and results?
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Old Jun 7, 2005 | 12:54 AM
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Originally Posted by John A. Marker
When you say to lower the rear end, how much? 1/2", 1" or what has been your experience and results?
I thought my car would never be driveable with street tires again after the HP upgrades. Between continued stiffening of the chassis, other chassis tweaks and lowering the rear, it's much improved. The recent addition of Goodyear F1 Supercars on the rear didn't hurt either. These are nice tires, the best thing I've had on it short of DRs. Any amount of lowering would help, even a 1/2" should make a hell of a difference. By drag racing standards, this is archaic technology. But since these cars didn't exactly have the rear suspension designed with drag racing in mind, the bottom line is that it still works.
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Old Jun 7, 2005 | 01:04 AM
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Here's one of my runs where it didn't hook, unfortunately nothing on the start.
http://www.corvette-challenge.com/vi...d_bye_4931.MOV
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Old Jun 7, 2005 | 01:28 AM
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I thought autox tires were terrible for drag racing because of the stiff sidewalls.



The races down here are pretty much all heads up, which I prefer. In brackets though, I'd rather race a faster car. Cars that are a half second slower just make the tree distracting.
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