Sidepipe horsepower loss?

[vector1]

you have a restriction somewhere, need more info. 750 carb would be on the small size imo. cam, what kind of power band are you looking for would determine intake. header pipe diameter, what do the heads flow. exhaust can have a big effect on hp, not only as a restriction but as a vacuum to pull intake charge into the combustion chamber to exceed the 100% volumetric efficiency thing.

[Dwight]

I have a 354 sbf with Ford Fuel injection. I had ProCom heads and dyno'ed about 320 rear wheel. I bought a pair of Keith Craft Brodix heads and one of his Custom Comp Cams to match my motor set up. I also installed a pair of Classic side pipes at the same time. Dyno'ed 402 rwhp and 416 rwtq.

The side pipes are 3" inside diameter and 4" longer than my old 24" x 2 1/2" I.D. pipes. The old side pipes had the louvers turned backward and I installed the new ones with the louvers turn forward. Quieter now.

Heads, cam and exhaust system, making good power for a small block.

I told Keith I wanted a street motor not a drag racing motor. I'm making 350 tq at 2500 rpms.
Fuel ratio at 12.5
Dwight

[Dwight]

Classic Chambered Exhaust Inc. - Home Page