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place I got my tires mounted at just pumped them up with 32psi on all four corners. For a street supra what is the best PSI for handling, fuel economy, traction, etc.. ?
 

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That's going to vary widely based on your tires, wheels, & alignment settings. There's no 'one size fits all' guideline for that.

If you go to an HPDE or open track day at a local road course, measuring tire temps across the surface of the tire with a laser thermometer is about the best way to see if you've got too much/too little tire pressure, as well as making sure you have good alignment/camber settings.

Naturally, what's ideal for the road course won't be ideal for drag racing, and what's ideal for drag racing or road course racing won't be ideal for street comfort, etc.

It's a game of trade offs - so try 32 psi for awhile, try 30, try 28, etc. See what you like from your own experience.
 

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I agree with Jeff but he didn't mention "try 36" so try that, too ;)
 
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