[rsimoes]

What do the jet extensions do?

Keith Craft dynoed my enigne and I assume it's the carb that was used, although it did not smell like fuel. However, they told me it would not due to the race gas they use.

But I also heard that they tend to leave it running a little rich to be safe.

I do have the dyno sheet, but how do I measure the A/F ratio at home?

I think we are talking about two issues. I think the stalling is unrelated to the misxure, since it does run well. I think the stalling, since it is only under g's (not that much mind you) is related to too much fuel in the bowl or two little fuel in the bowl. I never do see black smoke, as I would think I would see if fuel was being dumped in.

Do Holley's have this problem?