Quote:
Originally Posted by BrokenLinkage
Can anyone tell me: if I bite the bullet and upgrade from my 3.2 stock S engine to a 996 or Raby build engine with another 75 hp, am I going to need to go wider than 9"rears to get the power to the ground? As it is, I have PSM with virtually no spin, which I think would continue but perhaps with underutilization of the extra hp. Thanks for any informed insight.
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There is no hard and fast rule but most guys who run 300rwhp Boxsters at the top of the podium are also running 245/275 R-Comp or Slicks. They also see a big advantage in a motorsport LSD. A 275 tire will fit on a 9" rim. For street use it is a non-issue.