Originally Posted by
crazycage
or not karl.my cvh made 261@16psi on a stg 3 t3 with custom inlet and tubular manifold 8-5-1cr with a very good ported head on std valves.
I'd guess that is down to the head porting mostly? We know stock manifolds are good for 350+ (not to say they cant be improved of course), what cam was that on?
Although as John says his head was Stage 3 (but thats normally big valve John?!), so maybe the manifolds make more of a difference than we think?!