How do I tell what carburetor my Carter is?
The Carter AFB carburetors are roll stamped with an identification marking at the right front base of the carburetor’s mounting ear. The top line of the roll stamp identification has the carburetor identification number.
What size is a Carter AFB carburetor?
The first design AFB carburetors have a 4.5-inch diameter air cleaner base; a design used until 1961. The cfm (cubic feet per minute) of this carburetor is 500. The second design of the AFB carburetor was larger overall than the first. The air horn is more pronounced and extends down the side of the carburetor itself.
How does a Carter carburetor work?
Carter carburetor is a down-draught type carburetor. In Carter carburetor fuel or petrol enters into the chamber and air enters from the choke valve which is allocated at the top position. The choke valve keeps open during the normal running of the engine.
How many CFM is a Carter AFB carburetor?
Maximum Performance Carburetors The #3447 AFB Carburetors came thru with the smaller {4 5/8″} Air-Horn. When dialed-in and Flow Tested. They ‘Flow’ between 597 and 602 CFM’s.
What does AFB stand for on a carburetor?
aluminum four barrel
AFB stands for “aluminum four barrel” and this carburetor was used as original equipment on many OE performance engine options. In most cases, all of the dual-quad or triple-quad carburetor configurations that were factory installed from the late Fifties to early Seventies were Carter AFB carburetors.
How do I adjust my Carter AFB carburetor?
How to Adjust the Mixture on a Carter AFB
- Turn the engine on and allow it to warm up.
- Locate the two large slothead screws at the bottom of the front of the carburetor.
- Turn one air/fuel mixture screw in a clockwise direction with a slothead screwdriver with the engine idling until the engine speeds up.
How do you adjust a Carter AVS carburetor?
Connect the end of a vacuum gauge to the vacuum nipple on the carburetor. Locate the idle mixture screws at the base of the carburetor. Use a screwdriver to turn each screw clockwise until they gently seat. Unscrew them counterclockwise 1-1/2 turns for the initial adjustment.
How many CFM carburetor do I need?
The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency รท 3456. Any ordinary stock engine will have a volumetric efficiency of about 80%.