whats the best tire pressure for 215-65-15s ?
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whats the best tire pressure for 215-65-15s ?
i got these tires mainly because i do a lot of drag racing. im thinking of doing an autocross event in the next week for the first time so what would be the best pressure for the tires? thanks!
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Joined: Jul 2001
Posts: 217
Re: whats the best tire pressure for 215-65-15s ?
Originally posted by Soon2BMaxed
i got these tires mainly because i do a lot of drag racing. im thinking of doing an autocross event in the next week for the first time so what would be the best pressure for the tires? thanks!
i got these tires mainly because i do a lot of drag racing. im thinking of doing an autocross event in the next week for the first time so what would be the best pressure for the tires? thanks!
Since you are a novice, I would start with equal tire pressures, if street tires, I'd start at 34 psi cold or 36 psi hot. From there, add more air to the rear if your car is understeering too much(front end pushes out in corners). If you are overstering, take out from the rear. (Note: you are increasing by 2 psi at each adjustment) This is from personal experience, so don't take it as gospel.
The hardest part of autocrossing is you see a sea of cones. My advice is get there early and let the event officals know you are a novice so they can get you grouped with other novices and they tend to have people to give you pointers on how to handle the course. If they allow you, try to hitch a ride with someone on their first run since most people use that as sort of a warm up lap so they'll won't mind the extra weight.
Good luck and update how you do.
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Re: Re: whats the best tire pressure for 215-65-15s ?
Originally posted by speedy-t
Depends on the type of tires you have. I have 225/50/16 Nitto drag radials that I run 44psi in front and 46 or 48 psi in rear. My setup has a little touch of oversteer for those courses meant for Civics. Mine are this high also because the drag radials have a slightly softer side walls than most autocross tires. This keeps the side walls from folding. These have lasted me a long time. I think I have 32 runs on them.
Since you are a novice, I would start with equal tire pressures, if street tires, I'd start at 34 psi cold or 36 psi hot. From there, add more air to the rear if your car is understeering too much(front end pushes out in corners). If you are overstering, take out from the rear. (Note: you are increasing by 2 psi at each adjustment) This is from personal experience, so don't take it as gospel.
The hardest part of autocrossing is you see a sea of cones. My advice is get there early and let the event officals know you are a novice so they can get you grouped with other novices and they tend to have people to give you pointers on how to handle the course. If they allow you, try to hitch a ride with someone on their first run since most people use that as sort of a warm up lap so they'll won't mind the extra weight.
Good luck and update how you do.
Depends on the type of tires you have. I have 225/50/16 Nitto drag radials that I run 44psi in front and 46 or 48 psi in rear. My setup has a little touch of oversteer for those courses meant for Civics. Mine are this high also because the drag radials have a slightly softer side walls than most autocross tires. This keeps the side walls from folding. These have lasted me a long time. I think I have 32 runs on them.
Since you are a novice, I would start with equal tire pressures, if street tires, I'd start at 34 psi cold or 36 psi hot. From there, add more air to the rear if your car is understeering too much(front end pushes out in corners). If you are overstering, take out from the rear. (Note: you are increasing by 2 psi at each adjustment) This is from personal experience, so don't take it as gospel.
The hardest part of autocrossing is you see a sea of cones. My advice is get there early and let the event officals know you are a novice so they can get you grouped with other novices and they tend to have people to give you pointers on how to handle the course. If they allow you, try to hitch a ride with someone on their first run since most people use that as sort of a warm up lap so they'll won't mind the extra weight.
Good luck and update how you do.
Higher profile tires will need more air in fronts to keep from rolling over. We all watched an Acura TL-S last weekend almost ruin it's set because he kept his stock pressures. I actually ran 50lbs+ in my 225/55/16's for very hard cornering. For your 65 series I'd start @ 50lbs marked with chalk/shoepolish and then take 4-5lbs out each run until they wear to the sidewall markers.
Also, rears depend on the tread. As Soon2BMaxed said dropping pressure can reduce oversteer. On my Azenis and other tires dropping pressure actually increases oversteer and causes looseness.
Also, rears depend on the tread. As Soon2BMaxed said dropping pressure can reduce oversteer. On my Azenis and other tires dropping pressure actually increases oversteer and causes looseness.
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