wadebush wrote:

Paul,

I saw that you recommended a 3" square or round plenum with a 3 or more inch
throttle body.
What would be ideal for a 20b???
Wade
20b to be

Fifty percent more area. 3 X 3 = 9  X 1.5 = 13.5
Square root of 13.5 = 3.67"
Round it up to 4 by 4 inches minimum.
 
Paul Lamar
 
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