fuel delivery

[formula462]

Could getting a better mech fuel pump improve engine performance? I just have cheap parts store pump and it seems the engine starves a bit on top.
I have a Cliff built qjet and couldn't be happier..so long holley

[Cliff Ruggles]

The fuel pump and fuel delivery to the pump must be on par for the power of the engine.  What is your application, and fuel supply set-up?.....Cliff

[formula462]

.030 455
Rpm intake
comp xe 268
6x #4
9.2 comp.
larger ex valves
1 5/8 headers straight to mufflers
stock fuel lines
stock fuel pump
automatic
carb built to these specs by cliff

[Cliff Ruggles]

455's are difficult to feed with stock pumps and stock fuel lines.  If it noses over on hard runs, you will have to upgrade the fuel delivery system accordingly.  I couldn't feed a mild 428 in my car with the stock fuel system.....Cliff

[formula462]

Ok thanks Cliff any suggestions on fuel delivery setup..hopefully being able to stay with mech.pump

[Cliff Ruggles]

It's really as much about supply to the pump as how good the pump is.  Sucking thru a stock sump and tiny steel lines (3/8" lines are only 5/16" inside diameter BEFORE you bend them), a mechanical pumps output capacity is considerably limited.  Combine that with having to "pull" the fuel some 14' or more feet then deliver it to the carburetor under hard accelleration....no wonder most folks with high powered engines in fast cars get noise bleeds at the top of first gear when their cars nose over running the carb bowl dry!.....Cliff