Stock intake vs performer?

69 Cuda 440 said

AIV,

Porting and gasket-matching the Performer #2176 will be beneficial, especially for
higher RPM power {+4500 RPM's}.

The only negative, is that the Performer 'runner-ports' are not as big.

I think you can make the Performer 'close' to a 'stock' 1971 340 Cast Iron Intake
with massaging, but it will 'not' outperform the stock factory unit.

Click to expand...

Got it. The performer 2176 runners are small all the way through to the end.
And the porting work I did at the exits may make a slight improvement but the overall restriction still exists. That's the bottom line

That being said, it looks like the 71 #3512100 and the Eddie LD-340 have the largest runner ports (as does the victor)

I'm going to roll with the performer for now since I've decided to stay with the HP exhaust manifolds. Ill pick up an LD-340 down the line and pair that with a set of Doug's or TTIs.


Thanks again!

AlV