Where is carb king when you need him?
I also think the heat is a factor, but it is a factor because of today's gas.
Denny
The original Rochester B was on my 292 for many years before switching to a Carter AVS 4BBL, four years ago. I never had the problem you are having, but even so, I still think it's the gas.
I am trying to reacquaint myself with the Carter YH side-draft used on '62-'66 turbo Corvairs. They very often have a serious problem with hot restarts, with gas running out of the carb (remember it's a side-draft) and dripping from the air cleaner. There are a number of potential problem areas, inside the carb that can cause this, but after the carbs are made perfect, there are two other things that most guys have to do to stop the dripping. They have to lower the float level 1/16 - 1/8" below specs. The fuel pressure, even with a stock pump has to be regulated to about 2-3psi. The float levels and pump pressures that worked in the '60s, just don’t work on these carbs today.
I talked to a guy at a show with a '54 Vette, that uses the Carter YH on the 235. He said it's common knowledge among the other early Vette owners that they have to set the float 1/8" below original setting, on all three carbs. What worked in '54, doesn't work today, however they are able to use the original fuel pump without a regulator.
I'd say try your "B" with a lower float level (higher when measuring from the gasket, UP to the bottom of the float). I'd also check the pump pressure. It may be all stock original, but it may be more than the carb can handle with todays gas.
You mentioned a "B" in your other post that didn't have an idle (bowl) vent. Were you saying yours did or didn't have the vent? According to an old rebuild sheet I have, the Rochester "BC" didn't have a vent, but the "B" and the "BV" did. Or at least, only those two have an adjustment for it.
Henry
You didn't say what carb you have, but to answer your question, YES, I think you are correct about float level and fuel pressure.
