Quote:
Originally Posted by r lane
For a 3.0, twin plug, 12-1 track motor, what is optimal header sizing, OD. Related thoughts are header style preference. RSR style with a triangle collector or Bursch style with a pyramid collector. How does material figure into this as a resonance effect. Steel or stainless. Any dyno comparisons? Bob ps pictures found in the attic. Andretti at Sebring 
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you would need at least displacement and rpm to make an educated estimate
but here the theoretical max n/a flow per side vs rpm @100% VE
and some other pertinent info
ti Ys are common 4 and 8s and inline 6s but hard to package on a 911, though it can be done