AFB Tuning

I started working with Carter 4bbls in the 1970s. AFB, AVS & TQ. Also Edel later.

I have never used one or tuned one that needed more pump shot than using the outside hole on the pump arm, the least amount of pump shot. Later AFB & AVS,TQ & Edel used a 13/16" plunger. These are 4cc. Std Holley is 3cc, big pump is 5cc. So Carter pumps are quite big.