When should I use jet extensions?
Uncovering the secondary jets can cause a stumbling problme, and no amount of accelerator pump tuning will cure it. This occurs when a car leaves the line so hard that the fuel in the secondary bowl is pushed up against the rear wall, uncovering the jets. BG Fuel Systems and Holley offer jet extensions that correct this situation. Whenever jet extensions are installed in a carburetor equipped with a secondary power valve, the power valve must be removed and the hole plugged. Jet size must then be increased accordingly