Autocrossing and Road Course RacingEnjoy and discuss the fun through the twisties at your favorite auto-x event. Check out the links to the SCCA website to locate your local club.
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Going to my first autox event and need a few tips as to tire pressures. I'm running illuminas, going to set at 4f 5r. I noticed a lot of guys have very high tire pressures, just wondering how that works? I thought the car would slide too much if the tires are hard. I also have rsb, fstb, toyo t1r's 225 on stock rims. 255ish fwhp.
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6MT | 06HLSD | I/H/E & FC | Stillen FSTB & RSB | Eibach Pro Kit | Illuminas | Watkins STS | UDP | NWP Spacers | Greddy Blue | ES Bushings
253.50 fwhp
249.75 lb/ft tq
14.3 @ 101mph (street tires, bad wheel bearing and a few spun tranny bearings)
Last edited by knight_yyz; 07-26-2008 at 10:32 PM.
increase the tire pressure to reduce tire rollovers. usually set the rears higher than the front say i dunno, 40 psi front, 42+ in the rear.
can always chalk your tires to see how much, if you are rolling over
__________________ 03 Z33 Brickyard touring coupe 6spd 97 Maxima - Sold
Quote:
Originally Posted by 35oZephyR View Post
My350z = General Car Enthusiast Forum (sprinkled in with a little Z douchebaggery)
oops, that's a major typo. stock size 225/50/17's. I don't think a 255 would fit on a 7" wide rim. Edited the original post. Must have been thinking too far ahead and put whp number in the tire size. LOL.
__________________
6MT | 06HLSD | I/H/E & FC | Stillen FSTB & RSB | Eibach Pro Kit | Illuminas | Watkins STS | UDP | NWP Spacers | Greddy Blue | ES Bushings
253.50 fwhp
249.75 lb/ft tq
14.3 @ 101mph (street tires, bad wheel bearing and a few spun tranny bearings)
oops, that's a major typo. stock size 225/50/17's. I don't think a 255 would fit on a 7" wide rim. Edited the original post. Must have been thinking too far ahead and put whp number in the tire size. LOL.
thats a lot better. yeh, you should be fine
__________________ 03 Z33 Brickyard touring coupe 6spd 97 Maxima - Sold
Quote:
Originally Posted by 35oZephyR View Post
My350z = General Car Enthusiast Forum (sprinkled in with a little Z douchebaggery)
Always start with higher front pressures say 40-50lbs, chalk em for rollover and drop pressures say 4lbs each run til you start chewing into the outer sidewall markers. Then go back up a bit if needed. Novice drivers tends to push tires a tad harder then vets.
Well, I didn't make it out a few weeks ago because my tranny synchros were toast. So I got my new 06mt installed with flywheel and stage 1 clutch and went out today. Raced with the local honda acura club. My best time was 63.1 seconds, the fastest in the class they put me in was in the 58-59 range. So I am pretty happy with that considering I am NA with street tires, and most of the cars in my class had turbos and r compound tires and half the weight.
You're doomed.
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