650 hollyt on sbc if u punch throttle its amazing but goin down road at 2200rpm its like some one shut the fuel off but runs good punching it from a stop and never let off it axcelerates all the way to top end problem free
Boating - Holley - 0 80552 650 Cfm Four Barrel Carburetor
Answers & Comments
The wide open throttle on those had an enrichment system which worked with the usual fuel feed. If the mains were clogged or to small you would be able to run full throttle but have trouble with it after the throttles closed.
check your jet sizes and look for obstructions. Unfortunately- that ruins the bowl gaskets (ya they had some kind of glue on them) so make sure you can have some replacements on hand as the kit is around $60. and makes it problematic you would do it without just being able to get just the gaskets.