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autocross tire pressure #163661 Apr 24, 8:47pm Apr 24, 8:47pm
Joined: Apr 2004
Posts: 65
Atlanta, GA
2000 Black Toyota Celica Hooman OP
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Joined: Apr 2004
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Atlanta, GA
autocross tire pressure
I was wondering what people reccommend for tire pressure when autocrossing.
I have a GTS 16inch rims, Michelin Pilot tires. RIght now there is about 40+ psi in them all, it says max at around 50

I was thinking like 42 in the front, and 37ish in the rears.

Anyone know, autocross a lot? or has any experience.

Im used to my MR2..but rear wheel drive is totally different scenario for tire pressures.

Re: autocross tire pressure [Re: Hooman] #163662 Apr 24, 8:52pm Apr 24, 8:52pm
Joined: May 2003
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palm springs, burbank CA
Jae
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2001 Toyota Celica
Jae

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palm springs, burbank CA
when i go autoxing, i usually go 35-40 on all of my tires, with 17in falken azenis, they seems to work good so far

Re: autocross tire pressure [Re: Jae] #163663 Apr 24, 9:00pm Apr 24, 9:00pm
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Atlanta, GA
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why not lower in the rear, to help out with weight balancing

Re: autocross tire pressure [Re: Hooman] #163664 Apr 24, 9:17pm Apr 24, 9:17pm
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Idaho Falls, ID
Rocketman
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I would want the rear to slide as much as possible! I would say over inflate them. Because it is FWD you will pull yourself through the turns regardless. thumbsup

Re: autocross tire pressure [Re: Rocketman] #163665 Apr 24, 9:37pm Apr 24, 9:37pm
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Atlanta, GA
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why rear slide as much as poissible??
you realize drifting is slower...
its fun and looks cool..but its proven fact its slower

Re: autocross tire pressure [Re: Hooman] #163666 Apr 25, 2:00am Apr 25, 2:00am
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Riverside, CA
2001 Spectra Blue Mica Toyota Celica GTS Steven
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Proven fact huh? What proof do you have of that? Why do you think rally drivers drift their cars around sharp and slow hairpin turns? Coz it gets the nose of the car pointing out of the turn sooner than it would if you were to just drive it around. Saying stuff like drifting is slower is embarrassing to me and I didn't even say that. Don't ever say that in a crowd of people. You'll look really stupid. thumbsdown

You probably think it's slower because the loss of traction. Not all drifting is "slower." Maybe if you're showing off but rally drivers do it for nothing.

Re: autocross tire pressure [Re: Steven] #163667 Apr 25, 8:48am Apr 25, 8:48am
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Atlanta, GA
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true, what i meant is drifting through an entire autocross course is proven to be slower, watch some japanese videos of the same driver proving it...
but yes in some situations on SOME turns it is faster, and almost always in rallying it is

but in general on the autocross track on road surfaces it is slower

thanks for flaming me smile

Re: autocross tire pressure [Re: Hooman] #163668 Apr 25, 9:15am Apr 25, 9:15am
Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Speed4TheNeed
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steven is correct. drifiting is usually only attempted with rwd cars because they have much great handling with wheel-slip.

it all depends on the curves presented by the track. in some situations it's better not to drif and in others it's better to drift.

watch a drifting competition event or video. look at the way the courses are set up..they are set up to where you HAVE to drift to get a better time because the twists come so fast. you'd be going much to slow just to take the turns without drifting.

again: it just depends on the curves presented by the course that determines whether you should drift or not. one thing is certain though: sometimes drifting is faster--not slower.

Re: autocross tire pressure [Re: Speed4TheNeed] #163669 May 4, 2:59am May 4, 2:59am
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BC, Canada
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I autoX my GTS.. I have 225/50/15 Yoko AO32R Comps and i run 36F 34R and that was with the tires somewhat heated up... i haven't taken the presure with them cold yet. Just look at where the wear is on the tread of the tire. The autoX course design, weather, driving surface, and tire will all make a difference for the air presure, just experiment. One thing that i read to do with tire presure is its the times that tell you what is best not the way the car feels... Read the artilce in Car and Driver BOOST has a great article on a TRD supercharged Celica as well as a good article on tires!!!

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