basic rule of thumb with the plenum is to bellmouth the runners into the plenum around 1/3 the height of the plenum, with no bellmouth coming withing 1/2 a dia of the wall of the plenum.
plenum volume should be 2x the swept capacity of the engine
if the throttl is forward facing, a rearward taper on the plenum is required, exactly how much im unsure, and is best established on a flow bench (to make sure no one cyl is starved)
see if you can get jase's (aka yelorolla) thoughts on this
runer length should be as described in the other thread.
t/b size should similarly be based on peak flow rate of the engine (using the cfm model i initially used)
Fri, 15 October 2004 00:03
