Quick Fuel 750 fuel dumping out of boosters.

[LX9050]

I have a QFT 750 that dumps fuel out of the primary boosters when coming off idle. Stock squirters & air bleeds. Replaced the power valve, but no change, float levels are good. Any ideas? Fuel pressure is roughly 4.5-5 psi.

[Gaz64]

What engine? Camshaft? Does the carb lean back in the engine bay, not flat? When coming off idle? What engine speed? In neutral or under load?

[LX9050]

383 Chevy, 11:1 compression, dual-plane intake, Comp Cam 12-770-8 camshaft, not much angle in the engine bay. Coming off idle, booster dumps fuel, 1500 RPM or thereabouts. In neutral, no load. Primaries are open more than normal to achieve a decent idle.

[Gaz64]

I like your engine combo. Can you explain "dumps" fuel? It pours out? 1500 or so, you could be on the start of the main circuit. Can you post a video please? Gary