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Old 07-12-2004, 01:44 PM   #1
mpower22
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08 z51C6 (growing mullet)

Default whats a good front to rear psi for sti tires for less understear?

The owners manual recommends 36 front and 30 rear but this would really promote understeer right? whats a good psi for less understeer? 36/36?
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Old 07-12-2004, 03:55 PM   #2
kenchan
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Less psi will promote squirm on the shoulders and sidewall
enabeling the tire to loose lateral grip on high g turns...so
you'll want more PSI up front than the rear.

36/30 sounds pretty good to me.
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Old 07-12-2004, 06:46 PM   #3
BHawk
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Actually a lower pressure will increase grip so really you might want to try 30/36 instead.
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Old 07-12-2004, 06:52 PM   #4
KmanRuffian
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For oversteer you want more pressure in the fronts. Try it for yourself and you'll notice it right away. It gives the front more "bite" and reduces the tendency to plough. Try 40 in the fronts and 35 in the rear just for fun... You'll notice it. 40 can be a bit much for driving on every day though. But you want more pressure in the front and less in the rear. I used to think it was the other way around too until I came across a good write up on it. If I can find it on the net I'll post a link later... Goodluck, have fun!
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Old 07-12-2004, 06:57 PM   #5
KmanRuffian
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First 2 things that came up on google:

http://www.club4ag.com/faq%20and%20t...mendations.htm

http://www.susquehanna.com/susq/other/stuning.htm

I think I read the article in a magazine. 40psi might be oo much but you'll have to decide. If you go too hard you will indeed reduce grip due to a reduced contact patch with the road. But so long as you don't go past that point increasing the pressure up front gives you a "stiffer" tire with better "bite" and steering feel.
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