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that is the stupidest thing I've heard in a while. To decide what PSI you need isnt just a number that anyone can give you. It depends on what tires you are using and how the tires react with certin PSI levels. An easy way to see how much sidewall deflection and roll over you are getting is to get some white shoe polish and put it on parts of your tires sidewalls. Drive hard and see where the polish wares off. If it wares off to much on the sidewall you need more pressure. If it doesnt ware on the side wall at all take the pressure down a bit. You want it somewhat to use the sholder of the tire, but not the whore sidewall. This is assuming that you are running street tires, but judging by the question I dont think I have a problem assuming that. For auto x its a bit different. You want to focus more on lateral transition rather than lateral grip because the corners are so small and close together. You should run slightly higher PSI than you would for a HPDE or something like that.
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