How do I identify my Holley?
It’s like a “VIN” for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. The list number typically is four to six digits long and may or may not have a suffix number behind it. The date code will be right below it.
How do I know what carburetor I have?
Look at the upper front of the carburetor on the piece known as the airhorn, or choke tower. This is a rectangular part of the carburetor with rounded edges, open to the top of the part. There will be a small number stamped there.
Where do you find the carburetor number?
You’ll almost always find the model information on a Walbro carburetor stamped into the body on the side opposite the jets. Most of the time, you’ll find the number right beside the body.
What happens if main jet is too big?
Typical Lean Conditions: (A too-large main jet also mimics this symptom.) – The engine runs hot, knocks, pings and overheats. – The engine surges or hunts when cruising at part-throttle. – Popping or spitting through the carb occurs when the throttle is opened.
Do Holley main jets affect idle?
If you use a Holley gasket, you will not get any fuel flow through the idle metering circuit on the BG, and the idle mixture screws will not work. You can use the Holley gasket, but you need to slot the idle fuel transfer holes in the gasket to match the holes in the BG carb.
Why is my Holley carb running rich?
If your engine is running rich and my mixture screws do not have effect: The first thing you need to check is your float level. No fuel should run from the sight hole unless you shake the vehicle. Next check the engine vacuum at idle. (in gear if A/T) if it is 12″ or more a 6.5″ power valve will usually be fine.
Is quick fuel made by Holley?
Lakewood bought Quicktime, MSD bought Mallory and Holley bought them all. So aftermarket fuel injection is available from Holley under several brands.
How do you adjust a Holley air/fuel mixture?
Set the two air/fuel mixture screws to a baseline point so that the mixture can be adjusted while the engine is idling. To set the baseline point, turn each screw in a clockwise direction with a flathead screwdriver until each screw seats, then back both screws out 1-1/2 turns. Turn the engine on and allow it to idle.