I believe from other threads, not a lot of point in changing the manifold.
Quote from: Wayne on 28 February 2010, 23:34I believe from other threads, not a lot of point in changing the manifold.We built a 2.9 VR6 making 230 BHP (Schrick 268s, Schrick VSR, big valve head, ported TB) that still runs standard cast manifolds and downpipes...so they aren't restrictive.
prob loose some kg making the hp per tonne go up
Quote from: tweed on 01 March 2010, 17:19prob loose some kg making the hp per tonne go up This one is in a stripped track car with composite panels and lexan windows.I'd hate to think of the power to weight...but it gave my 911 a hard time up to the wrong side of 140 MPH.