Quote:
Originally Posted by Art Newland
9 inch rear sucks up a lot of horse power tho.
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Is there a dyno tested answer to how much HP loss, or is this a bench racing myth? Any lost horsepower would be due to excess friction (from the sliding action of the extreme hypoid gear design). Excess friction causes excess heat. Excess heat can soften gear teeth and cooks the lube, causing rapid wear. Yet millions of 9" rears outlasted the vehicles they lived in! Plus, the racer's differential of choice is overwhelmingly the 9".