Anybody know a good manual formula for calculating primary tube and collector diameter?
Anybody know a good manual formula for calculating primary tube and collector diameter?
http://www.google.com/search?q=header+calculators&sourceid=ie7&rls=com.microsoft:en-us:IE-SearchBox&ie=&oe=
"You can roughly calculate primary internal diameter with this formula: ID = (The square root of cc/(P+3) x 25) x 2.1 Where: ID = Inside Diameter cc = Cylinder Volume in cc P = Primary Length
Having a tube with a slightly larger cross sectional area than the exhaust port is a decent starting point as well."
Fill out the Burns header sheet and have them give it to you.
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