Originally Posted by purplemonte
Have a 355 chevy with a edelbrock performer package in it and vortec heads. I put on a 650 speed demon and the car has a bog when you hit the throttle for a second or 2 before it takes off. It is a vacume secondary carb should i go with a stiffer spring to slow down the secondaries.
Nope. Secondaries aren't even opening yet, when your first hitting the throttle. Try a bigger squirter and check for any vacuum leaks.