Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
7045214, w/ complete kit from Cliff installed, recipe #2, WOT problem.
spluhar:
@ 4000 rpm, the carb lays down. It actually seems to be running out of breath before that, and by 4200 its all over. It's a 71 429 Ford, 10-1 compression, ported heads, 216/224 @.050, 519/513 lift cam, and Performer intake, stock exhaust manifolds into 2.5 duals w/ x pipe. Fuel pump is a Carter Muscle Car mechanical w/ 45 gph @ 5.5-6.5 psi., 3/8" rubber hose routed smoothly to the carb, 5/16" stock steel lines from the tank. I took off an Edelbrock 1407 750, which pulled strongly up over 5000 rpm, and I had a fuel pressure regulator on it set lower than it should have been (took that off).
Cliff Ruggles:
Certainly fuel delivery related. Pretty small fuel lines for that power level, as a 5/16" line is only 1/4" diameter on the inside.
Rubber hose on the pressure side is NEVER a good idea, it soaks up heat and can cause all sorts of running issues, not to mention leaks and fires, etc.....Cliff
77cruiser:
What size seat on the fuel inlet?
spluhar:
--- Quote from: Cliff Ruggles on September 24, 2014, 04:51:20 AM ---Certainly fuel delivery related. Pretty small fuel lines for that power level, as a 5/16" line is only 1/4" diameter on the inside.
Rubber hose on the pressure side is NEVER a good idea, it soaks up heat and can cause all sorts of running issues, not to mention leaks and fires, etc.....Cliff
--- End quote ---
Small fuel line fed the edelbrock at this level w/ no problem. I'll change out the rubber once this is figured out
spluhar:
--- Quote from: 77cruiser on September 24, 2014, 04:55:48 AM ---What size seat on the fuel inlet?
--- End quote ---
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