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craigerz craigerz is offline
Join Date: Feb 2008
Location: 15 miles no. of Salt Lake City
Posts: 550
Knife-edging a crank on a dry sump motor like the Porsche is not going to do much in terms of horsepower... Boat-tailing the pistons may help a little, but not much, my guess is only 2-3 hp at the 5500 -6000 rpm level. But remember, theres as much movement of air on the inside of a motor as there is thru it on a normally asparated motor. If you were racing Nascar where they work all year just to find 5 hp, then knife-edgeing and boat-tailing may make sence...
Old 03-01-2008, 02:48 PM
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