IF YOU INSTALLED A HIGH FLOW (?HIGH PRESSURE?) PUMP BUT NO REGULATER, MAYBE YOUR GETTING TO MUCH FUEL? I KNOW FOR A FACT THAT HOLLEY NEEDLE/SEATS WILL ONLY HOLD BACK 7 PSI AT THE VERY MOST. ABOUT THE SECONDARY SRINGS: YES IT IS POSSIBLE THAT TOO LIGHT A SRING WOULD ALLOW YOUR SECONDARIES TO OPEN WAY TO SOON, STUMBLING YOUR ENGINE (UNTIL, AS YOU SAID, IT CAUGHT UP).TOO HEAVY OF A SPRING WOULD JUST LEAVE YOU ON 2 BARRELS LONGER AND FEEL LIKE, WELL, 2 BARRELS, BUT PROBABLY WOULD NOT HAVE A STUMBLING EFFECT. JUST MY 2 CENTS! GOOD-LUCK, MARLIN.
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