1st test intake manifold flows for the OOTB Holley Strip Dominator and the OOTB Edelbrock 340 Victor.
Strip Dominator port window is .970 X 2.150 = 2.086 sq. in.
340 Victor port window is 1.000 X 2.015 = 2.015 sq. in
Port #.............Strip D............340 V
1)....................257 cfm...........256 cfm
2)....................257..................257
3)....................251..................261
4)....................262..................261
5)....................261..................263
6)....................264..................261
7)....................256..................257
8)....................259..................257......................it all seems pretty equal
So then, after bolting the intake manifold to the head we get this...............
Air flow through the cylinder head with the manifold installed is hard to correlate. The flows are all over the place at different lifts. Maximum flows came somewhere between .500-.600 lift. So I'm going to list only the maximum flow for each port and say we are way off of the port flow through the head by itself, generally 30 cfm or more.
Port #.....Strip Dom intake & head/intake only............340 Victor head & intake/ intake
1)................267/257 @ .600......................................257/256 @ .500
2)................262/257 @ .550......................................262/257 @ .550
3)................251/251 @ .600......................................259/261 @ .600
4)................256/262 @ .550......................................254/261 @ .500
5)................259/261 @ .600......................................257/263 @ .500
6)................262/264 @ .550......................................262/261 @ .550
7)................264/256 @ .600......................................261/257 @ .550
8)................262/259 @ .550......................................267/257 @ .550
In some cases the flow increased through the through the intake head combination over the flow through the intake only, and sometimes it decreased or stayed the same.
