Edelbrock / Weber / Cater Carburetor Problems.....
OK, Here is my situation:
SBC in a '32 Ford, 9:1 Goodwrench crate, smooth idle cam(~.450" or so) dual plane intake, Edelbrock/Weber AFB-style 600cfm carb. Simple little motor.
Now, in the primaries of the carb, there are two smaller "booster venturis", they hang in the middle of the primaries from the sides of the carb body. In the middle of the boosters, there is a brass port that the fuel flows out of. My problem is even at idle, fuel drips out both boosters. I mean like 2-3 big drips per second. Needless to say, the engine runs pretty poorly with this condition.
From all my experience as well as input from others, this is a symptom of a stuck needle and seat. We have checked the N&S, adjusted the float hieght up and down, etc. And not just on the one carb, we have tried three different carbs on this engine, two rebuilts and a new one. We also have tried two different fuel pumps(thinking too much pressure), and lastly added a regulator. The supply side is definately not the problem.
We also pulled the primary metering rods, took the springs OUT of the carb, then dropped them back in...so they were fully seated in the primary jets...no change...drip-drip-drip.
With each of these changes, the problem is exactly the same. Like I said these are fresh rebuilts from NCS, as well as a brand new one that was operating perfectly on antoher engine a few weeks ago.
So what do you all think? I think I've given a pretty accurate and complete description of the problem.