Quote:
Originally Posted by Gaz64
The trouble with late model Holleys now is they all run the more efficient umbrella inlet check valve in the pump cavity, but they all don't have a pump bleed back to the bowl, typically. 013, so when the pump chamber gets hot, it dribbles out the pump nozzle, flooding the engine.
You can drill a .013 hole outside the umbrella so the pump can bleed back.
Some guys machine a groove in the bottom of the bowl near the edge of where the umbrella seats.
Early bowls with their hung inlet check ball rarely suffer from this condition.
Gary
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I'm going web hunting for a how to on this!
Thanks!
Steve H