Will lowering the tire pressure on street tires do any good. And if so, what pressure would be a good starting point? The reason why I ask is that one of my friends told me to drop the pressure to about 20 psi. He claims it would hook better. But does this work with sreet tires?? Thanks Again!

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Jason Gamlin
'86 Iroc
350 5-speed

 

A radial street tire works best at 32-35 psi and no lower than 28.

Lowering the pressure in a radial tire gives less traction. The sidewalls are too stiff to roll over like with a drag slick or bias ply tire. Since the sidewalls are too stiff, the center of the tread will rise up instead. That is why when you have low tire pressure, the outside edges of the tire wear out faster.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.69
Best MPH on a time slip: 121.52 altitude corrected to 127.76
Altitude corrected rear wheel HP based on power to weight ratio: 504.5
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

[This message has been edited by Stephen 87 IROC (edited May 30, 2001).]

 

Thanks for the help!! I'm running about 32 psi right now. I think I'm going to be hooked up with a set of DR's for this weekend. One of my friends has a 4th gen that has a set. Well see what happens!!! I'll probably still ease out of the gate, but come into the throttle a lot quicker. So hopefully I won't gernade anything!! Thanks again for the help Stephen!!!

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Jason Gamlin
'86 Iroc
350 5-speed