Drag Racing Discussions > Front Engine Dragsters

Slick Tire Pressures

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jspell:
When discussing air pressures for slicks half the time people tell me more air equals more traction and the other half says less air equals more traction?

rooman:
Too many variables to make a hard and fast rule----tire construction, rim width, car weight, and the big one--what pressure you are starting out with as a base to determine more or less.

Roo

jspell:
Thanks Roo...generally speaking wouldn't increased pressure equal more wheel speed and possibly more slippage? 

dreracecar:
But too little and the tire spends the time at the hit wrapping around the rim rather than moving the car forward.
 There is no clear answer. you must find what works for you given the track prep. Tires are so different from the days of low pressure tires and little track prep that "wheel speed" gets the car moving quicker thru the 60' because there is more traction available. In some respects, look at NHRA SS racing, the cars move off the line quicker doing a wheelstand then not doing one.

jspell:
Thanks Bruce...makes sense!

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