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Recommended tire pressures?

Guys, I have the following tire sizes:
F - 245/40-17
R - 315-35-17

What tire pressures do you recommend? the factory F-29, R-44 sounds out of wack to me.

Thx.
Old 07-24-2012, 07:50 AM
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I have the same set up right now and have the front's at 32 and rears at 38 Kumho Ecsta's. Seems to be working well but I'm no expert.
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Old 07-24-2012, 09:42 AM
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Cold 32 & 36.
Old 07-24-2012, 02:50 PM
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Not sure what the guys feel on this thread, but tire technology has changed a ton since these cars came out. Sidewall strength is not what it was 25+ years ago.

If you have the ability to do some spirited driving, you can use a pyrometer to see how your tire temps look, that would be the best way to get your optimum pressure.

This kind of backs up the more balanced pressures listed by the 2 other posters.

Last edited by IMR-Merlin; 07-24-2012 at 03:05 PM..
Old 07-24-2012, 03:03 PM
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Quote:
Originally Posted by IMR-Merlin View Post
Not sure what the guys feel on this thread, but tire technology has changed a ton since these cars came out. Sidewall strength is not what it was 25+ years ago.

If you have the ability to do some spirited driving, you can use a pyrometer to see how your tire temps look, that would be the best way to get your optimum pressure.

This kind of backs up the more balanced pressures listed by the 2 other posters.
How do you evalute the temp readings you get?
Old 07-24-2012, 03:15 PM
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Run hot pressure 32 front / 35 rear with Toyo R888 235/295 18"
Old 07-24-2012, 05:15 PM
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Quote:
Originally Posted by Miguel Antonett View Post
How do you evalute the temp readings you get?
Depends on what you get for temps. I can link you to some threads for reading tire temps if you need help figuring out data once you collect it. Tire temps are your best place to check your tire pressures and camber. Everything else you can trim up by the seat of your pants.

Quick search found this.

http://www.northstarmotorsports.com/tech.tips2/

I can get more elaborate if needed later. I have to work early tomorrow and logging off.

Last edited by IMR-Merlin; 07-24-2012 at 05:21 PM..
Old 07-24-2012, 05:19 PM
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Prrrrrrreeeeeeettttty cool, it makes sense. Thanks!
Old 07-25-2012, 06:04 AM
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I am starting with +4, -4 so F-33, R-40.
It will be hard to figure out the correct pressure without going to the track or using up a set of tires to see how they wear in.
Old 07-25-2012, 08:41 AM
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