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Old 03-19-2008, 10:18 AM   #70
Scooby Newbie
Member#: 43669
Join Date: Sep 2003
Chapter/Region: International
2006 STi


Originally Posted by tino View Post
damn u race car drivers.
AS for the 3" dump i also have a 2" wastegate tube venting out into the atmo.. so this would then make the exhaust gases flowing out of a 5" diameter??
Actually not to be anal but a 3' dump plus a separate 2' dump only equals a 3.6' total dump area because it works on surface area...

3’ dump = 1.5 (radius) squared times pi
2’ dump = 1 (radius) squared times pi

3’ area + 2’ area = 10.210 square inches

Divide that by pi then square root it you should get 1.80277564 (radius)

Now double that and you have you total diameter of exhaust dump-age
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