- Local time
- 9:17 AM
- Jul 12, 2010
- Reaction score
That’s exactly what a transition is. He is moving the throttle a lot. It helps to understand basic carb function. When you open the blades suddenly, the engine takes in a big gulp of air. It needs the pump shot to make up for that and not go lean. It needs time to recover and draw enough fuel to match the air coming in. That’s what the accelerator pump makes up for.He is not getting a lean stumble on transition. He states in the first post that when he is cruising & he stabs the throttle, he gets the stumble.
With main jets reduced by 3 sizes, it is going to need a sizable increases in the PVCRs to make up the difference & avoid a stumble.