Originally posted by dallasb84:
im just curious about something. 100 cfm is a whole lot. now i know this first hand it is very important to maintain a certain amount of velocity in the intake runners. bigger isnt neccesarily better. right? i mean thats why you see people with velocity stacks even when not using a manifold otherwise your fuel wont atomize and itll puddle. just like your not supposed to "polish" and smooth out your intake ports on your heads as well as even mess with em too much when porting and polishing. your just posed to port match the manifold to the head and rough up the head a little. im sure this wont hurt the svt if EH is involved but 100 cfm is a lot. i guess it wouldnt matter too much with boost but to really crank it open for people with na i think thats a little tricky.



Ok first off were talking about intake manifold. In case you didn't know its a two piece setup. We are porting out the upper portion, just like svt did from the factory, but just a litte more. The injectors are located in the lower manifold, so no fuel is in the upper manifold and can still atomized properly in the combustion chamber were its suppose to. So widening the runners in the "upper manifold" will greatly improve air flow to the lower manifold were it may reach a restriction there. In effect it may add something like 2psi to the lower manifold, more pounds means more air, means more fuel equals more powa . The extrude hone process does leave a bit of a rough finish, so swirl will stil be present. I am just not sure were there getting the extra 100cfm over a triple honed manifold. Time will tell

'99 Silver svt For sale 19" Axis Neo wheels 3.0 parts, pre-98 trunk, Check classifieds bp.powell@comcast.net