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Joined: Apr 2004
Posts: 65
Hooman
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Hooman Apr 25, 3:47am - #163661 
2000 Black Toyota Celica
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2000 Toyota Celica

Joined: Apr 2004
Posts: 65
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.
Joined: May 2003
Posts: 583
Jae
Senior Member
Jae Apr 25, 3:52am - #163662 

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2001 Toyota Celica

Joined: May 2003
Posts: 583
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
Joined: Apr 2004
Posts: 65
Hooman
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Hooman Apr 25, 4:00am - #163663 
2000 Black Toyota Celica
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2000 Toyota Celica

Joined: Apr 2004
Posts: 65
Atlanta, GA
why not lower in the rear, to help out with weight balancing
Joined: Jan 2004
Posts: 1,248
Rocketman
Specialist
Rocketman Apr 25, 4:17am - #163664 

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01 Toyota Celica

Joined: Jan 2004
Posts: 1,248
Idaho Falls, ID
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
Joined: Apr 2004
Posts: 65
Hooman
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Hooman Apr 25, 4:37am - #163665 
2000 Black Toyota Celica
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2000 Toyota Celica

Joined: Apr 2004
Posts: 65
Atlanta, GA
why rear slide as much as poissible??
you realize drifting is slower...
its fun and looks cool..but its proven fact its slower
Joined: May 2002
Posts: 3,295
Steven
ECelica Staff
Steven Apr 25, 9:00am - #163666 
2001 Spectra Blue Mica Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS

Joined: May 2002
Posts: 3,295
Riverside, CA
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.
Joined: Apr 2004
Posts: 65
Hooman
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Hooman Apr 25, 3:48pm - #163667 
2000 Black Toyota Celica
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2000 Toyota Celica

Joined: Apr 2004
Posts: 65
Atlanta, GA
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
Joined: Aug 2003
Posts: 6,372
Speed4TheNeed
Caleb
Speed4TheNeed Apr 25, 4:15pm - #163668 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
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.
Joined: Feb 2004
Posts: 157
HJC_Celica
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HJC_Celica May 4, 9:59am - #163669 
2000 Silver Toyota Celica
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2000 Toyota Celica

Joined: Feb 2004
Posts: 157
BC, Canada
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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