This video is a tutorial on how to set the APD Carbs Primary and secondary idle. This video features John Kyle, and Myself. John is the owner of Advanced Product design(APD). We are working together on a series of carb tuning videos. This applies to his APD series of carburetors. The principle of the adjustment is the same. Make sure engine is warmed up, make sure throttle cable unhooked, make sure throttle cable is adjusted correctly, all throttle blade open with throttle pedal to the boards.
The procedure is quite simple, just important to do it the same order.
Warm up car, unhook throttle linkage
1. Back off the Primary throttle blade adjustment screw, until you have an air gap between the adjusting screw, and throttle bracket.
2. Back off Secondary throttle blade adjustment screw, until you have an air gap between the adjusting screw, and secondary throttle blade bracket.
3. Then loosen lock nut, and back off Anti-stick threaded rod
4. Tighten Primary throttle blade adjustment screw, until it just touches the Primary throttle blade bracket.
5. Tighten Secondary throttle blade adjustment screw, until it just touches the Secondary throttle blade bracket
6. Then tighten Primary throttle blade adjustment screw in 2 1/2 turns in (Clockwise), then repeat the procedure to the Secondary throttle blade adjustment screw, 2 1/2 turns in.
7. Then tighten the Anti-Stick rod in, until it just touches the bracket, then back off 1/2 out, (counterclockwise), and tighten lock nut