PCA Club Racing: B Class GT3 or GTC3 GT3 Cup

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10-12-2007, 02:34 AM

#31

GT3 Nut

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Quote:

Originally Posted by kgorman

Well, I am not the expert, but talking to some of the guys out west here, I was under the impression that running the race motor in a cup and running it up near the rev limit (aka, racing), it would require a rebuild after somewhere near 80 hours. Clearly the street motor does not require that kind of maintenance. And no they are not the same motors (as I understand it).

Please correct me if I am wrong guys.

You are wrong. The differences between the Cup motor and the street GT3 are only slight. The cams on the street car have variable valve timing - the cup doesn't. Otherwise the motors are essentially the same. Of course if you ran the street motor at red line all the time racing it will require a rebuild at similar intervals as the cup. But most people with the street gt3 are not running at red line or racing their cars ALL the time. A cup car is by nature a race car and therefore is more than likely used as such. Thus it will require a rebuild accordingly.

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