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Go Back   Australian Ford Forums > MotorSport > Drag Racing

Drag Racing Discuss Drag Racing here be it dirt or tarmac. Sponsored by Sydney Dragway.

 
 
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Old 24-05-2009, 07:18 AM   #1
sideways82
loving the turbo
 
Join Date: Dec 2007
Location: Far north queensland
Posts: 1,535
Default tyre pressure

g'day, I've got a bf turbo with 277kw at the wheels. Last night was my 2nd time down the townsville strip since it has been tuned, running 235/45/17 with some standard full street radials. I went in february and ran 13.10 @ 109.75, was spinning a little bit in 2nd with the tyres at 26psi. Last night was probably 14 degrees cooler and half the number of cars there. The tyres were at 25psi andi was spinning in 3rd which i can't even chirp on the road with 38psi. I let the tyres down to 22psi and had my spare and 2 more wheels and tyres in the boot to try and get traction. Ended up with 13.10 @ 111.38. Sooooo after all that long windedness

What is the lowest pressure i can safely run 235/45/17 on a 7.5 inch rim?

__________________
BF mkII 6 speed ZF
now with 500hp at the tyres
best times so far on street tyres
12.48@113.92 with 277rwkw
12.27@119.1 with 320rwkw
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