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by claret on July 2nd, 2006

claret

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What is the horsepower of a cup car and Busch car?

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  • by Henry Hascup on July 3rd, 2006

    Henry Hascup

    750-850 depending on track for the Cup cars and approx. 100 horsepower less for the Busch cars.

    http://www.jayski.com/pages/diff.htm

    Busch series cars use 390 CFM carburetors, and Cup cars use 750-850 CFM. There used to be a huge difference in horsepower several years back, but Busch series motors now use a full roller camshaft and lifters. Cup engines are still using flat tappet lifters. These differences (and a few minor others) equate to about a 100 horsepower difference, with the advantage given to the Cup motors.

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