[dlampe]

Rick, I don't know who makes the pulley. Call my engine builder, Lumpy. Reference the Kirkham cobra and he will tell you. 618 664 4767

After plenty of testing i feel like I am getting closer. I switched to an F7 tube and that really helped. My current setup is represented in the first post. I do notice the engine stumbling at around 2500 rpms. Any ideas? I can't really tell if it is lean or rich at this point. It is not popping, just not running smoothly. I tried smaller mains, 65 to 55 and the car was barely drivable. It runs great above 3000. Is this still idle jet holder territory? Remember this is at a constant speed.