This is topic street tire psi for 1/4 mi. pass in forum Tech Talk at Northern California Ford Owners .
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Posted by MACK.GT (Member # 10461) on
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for those who've experimented with this setting,, what has worked better then 32psi , I have a stock rear suspension 245/45/17 tires.
Posted by SLOW95GTS (Member # 10365) on
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Usually with street tires it isn't a big deal, but i usually go with 28-30 on my 18's.
Posted by Blind (Member # 3052) on
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on street tires you want the tires pumped up to normal spec (32).
the reason is the sidewalls of the tires - the outside edge - is very stiff.
Lowering the psi will make the middle softer, so it will sag inwards compared to the edges, meaning less tire will touch the ground.
Easy way to tell is to do a quick burnout, if the psi is right you'll see the full tire contact leave marks.
slicks and d/r's get aired down more because the sidewalls are softer and will let the tire bite into the ground more when they have less pressure.
Posted by Stanced Stang (Member # 11891) on
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Blind hit the nail on the head, airing down your street tires is a moot point.
Posted by racsirx (Member # 1710) on
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I don't know about tires today but the old bfgoodrich use to work in the 1.8-1.9 at 18-20psi for us back in the day, I think I remember member "greek" going 11s this way.
Posted by 90GT510 (Member # 9199) on
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quote:
Originally posted by racsirx:
I don't know about tires today but the old bfgoodrich use to work in the 1.8-1.9 at 18-20psi for us back in the day, I think I remember member "greek" going 11s this way.
+1 I've had better runs with lowering my tire pressure and adding a burnout even on street tires believe it or not. But yea ^^ ur right 18-20 psi is what we usually do at the track too.
[ 2014-09-12, 07:35 AM: Message edited by: 90GT510 ]
Posted by Stangs R Us (Member # 4495) on
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It really depends on the tire , get a pair of cheap rims and some drag radials BFG or MT and you can still run them on the street. I think the best 60 ft I cut on bfg's was a 1.5
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