Quote:

There are several things it could be. To keep from hiding the symptom and not fixing the problem, check things in a certain order.
1. make sure ignition is advancing properly
2. make sure carb is clean, no blocked passages
3. jetting, your's sounds fat enough
4. power valve needs to open at the needed vacuum
5. accelerator pump needs to supply enough fuel till the boosters come on line



1. I'm chasing down a part throttle ping so I've been working with the advance quite a bit: it works.
2. It is a relatively new carb. I can't say for sure I don't think it is funked up.
3. I agree. Could possibly go back to 72s on the primary even.
4. My idle vacuum is 12inhg. So I'm running close with the 6.5 PV that comes in the carb from what I understand.
5. I'll check the pump shot out on Tuesday this coming week when I've got a bit of time free during daylight.