Hi guys Obviously I know the recommended minimums, but I like to experiment a little with pressures. Running P zeros on stock wheels on a 1994 spider. You might save me some time here. What pressures are you running and any other thoughts on this subject. Thanks
I'm running the stock tire pressures, but I've been thinking of buying a pyrometer. It's a tool that measures temperatures. You run it across the tire immediately after building up some heat (that's by driving at maximum speed down your favorite curvy road) and observing the variance in temperature across the tire. Acjusting the pressure will yield different levels of variance. Ideally, the tire would have a constant temperature across the tread. Whaddyathink?
I run 36 in the front and 32 in the rear on the track (warm of course). Of course I dork around with them depending on how the car is handling but this seems to be a pretty good setup.
I am running PS2 Michelins on 18" Challenge wheels. On the road I run 34/36 (F/R), cold. At the track I run 29/31 warm. Ciao.........Dino
guys tires are a pain last year i spun out twice on the road 1995 348 spider bridgestone 17's this year i put on 18's eagle f1s with great ronal wheels looks great but still a little shy on the corners max psi is 51 goodyear says run 45 ? i have the rears at 36 fronts at 34 still bothers me how it handles so i guess i'll keep on messing with pressures till it improves fuzzy
my understanding is want less pressure in rear to increase traction since car is mid engine and prone to oversteer. also with more pressure up front get easier steering since its manual. try reversing f/r pressures and will see improvement
Yep you are right that is what you want to do...drop pressure in the back. I think 45psi is really high as I had to drop from 36 to 32 to get the back to stay planted. Besides that I would make sure you car has a good alined and has the correct camber dial into the wheels. It seems strange its squirrly on the road as you can push this baby pretty hard on the track and not get the rear end to step out when you dont want it to unless you do something stupid.
Strange. I have never owned, or heard of, a rear weight bias car requiring higher front tire pressure than rear. They all either run higher rear pressure or equal all around. All my former Porsche, Ferraris etc were the same. Would be very interested in other's experiences.
