[Tom Vaught]

Originally Posted by Ventura455

I have had similar results with this adapter.

In my opinion, if you take/make a Holley to Q-jet adaptor (same deal as a Q-jet to Holley adaptor) SHOWN ABOVE IN THE QUOTE with the smooth transition from square bore to spread bore and then radius blend the sharp openings in the Q-jet manifold the results should be similar (or possibly better with the higher cfm carburetor.

BUT if you leave the sharp edge openings in the Q-jet manifold (on the Primary side of the intake) you are basically flowing a sharp-edged orifice which will have about 62% of the flow of a radiused opening. If the carb blade has the same basic size as the sharp edged primary manifold opening and the thin gasket is used then the air just passes into the intake without the reduction in flow as the primary throttle blade size/blade controls the flow into the opening.


So you have to look at the whole test and the way that it was run. Lots of times the results will be closer than you think if proper effort /preparation is done before the dyno testing.

Again, Great Job Harry and thanks for the real world comparison on the man's requested combination.

Happy New Year. Hope Santa was good to all of the members.

Tom Vaught