Quote:
Originally Posted by XXXBlackLs6M22
Yes it is a 4 Speed only addition, It's also called a dashpot.
It's purpose is to slow down throttle closing so that air can mix with the gas and lower hydrocarbon emissions. If the throttle blades are snapped shut, especially after acceleration as you'd see on a manual trans motor upon shifting, then the fuel that was in the manifold doesn't get enough air, and the mixture goes very rich for a moment. When the dashpot slows the throttle return, the fuel has enough air to burn in the combustion chamber and the mixture burns cleaner. They weren't needed on automatic trans cars because you don't have the throttle open/closed/open during shifting like a manual.
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Gotcha,I understand. Does a 4 speed Holley carb have the same kind of dashpot?