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Re: Crank scrapers - HP increases?
[Re: dthemi]
#180983
01/02/09 07:42 PM
01/02/09 07:42 PM
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Scrapers help in dry sumps just like a wet sump. The oil tries to wrap up all over the crank even in a dry sump. the more you can scrape off the better. I like big dry sump pans with scrapers and screens, and a big bulge on the side for the oil to get slung into.
Windage trays,baffeling,and simple direction oil catches will gain you 10 to 20 Hp.Elaborate closefitting scrapers,wide block(oil pan rails),wide pans,drain down control with proper crankcase ventalation will net you much more.Determining how much depends on the oil control factored by the amount of oil passing from the clearences that splash lube the rotating parts as well as the cylinder walls.Scraper minimize the splash oil and most componants can live on suspended mist lubercation.I wouldn't recommend it for long duration running,but it would be excellent for short duration race engines. 
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