George Lendich wrote:

Paul,
I've worked out the area of the manifold tubes for the 12A and added 20

percent which gave me 2.5"

throttle body - is that about right.

I initially allowed 20 percent for the boundary layer of the tubes,

thinking that's more than

enough. However I don't know if I should allow for more for some

turbulence in the plenum.

What do you think !?
George (down under)

A 2.5 throttle body will work but you probably would get slightly more
power with a three inch. I don't really have a curve of size
verses pressure drop as a lot depends oh how streamlined the butterfly
mechanism is.

Paul Lamar

Paul,
Right, forgot about the Butterfly turbulence!
George (down under)

 
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