What Is the Transition Slot in the Holley Carburetor For?

Answer The transition slot is also called the idle transfer slot, and its purpose is to help smoothly transfer fuel from an idle position to an off-idle position.

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How to Jet a Holley Carburetor?

Holley Dominator carburetors have been used in drag racing and performance vehicles for more than three decades. Car owners can adjust the amount of fuel that is fed into the combustion chambers of... Read More »

How to Modify a Holley 660 Carburetor?

The Holley 660, named like all Holley models, for its CFM (cubic feet per minute) air flow rating, can be modified in three primary ways. You may modify the flow pattern of the fuel and/or vacuum w... Read More »

Holley Carburetor Specifications?

Holley produces a wide range of carburetors. Each product is made to serve a different purpose, so the specifications must alter for each carburetor. Holley is the only modular carburetor company t... Read More »

How to Tune a Holley 750 Carburetor?

Carburetors were used in engines until the 1990s as a way to control the air and fuel mixture needed to operate a vehicle. They were later replaced by fuel injection systems, which provide better c... Read More »