Sorta OT - V8 carb Q, On topic for the V8 teener guys Options

[Gint]

It's been a looong time since I had a good old fashioned 'murican carb'd V8. My 72 Chvy truck has had an ongoing hot start issue. After running it to full temp and shutting it off and coming back to start after 10 minutes or longer (until it cools off anyway, then everything is fine), you have to open the throttle at least half way to get it to start. And then it runs like crap for a few minutes. Then all is well again. I've suspected fuel boiling for a while now, so I rebuilt the Edelbrock 600 carb today to verify float settings and general health of the carb.

Today after I finished it and drove it and warmed it up, I waited 10 minutes and then tried to restart. The problem still exists. I pulled the air cleaner off and I could hear fuel bubbling. There was fuel leaking from the secondary throttle shaft on the right side of the carb as well. Taking the carb top off revealed fuel in the right side bowl still bubbling a tiny bit. The float bowl is dumping fuel into the secondary cavity and causing the leak at the secondary throttle shaft and dumping fuel into the manifold. So root cause is determined. I have a buddy that is going to give me a phenolic spacer and gasket that I will install later this week.

Is this fairly typical?

[Rgreen914]

Ran a couple of small blocks with Q-jets and never had any real problems; it's been way too long since I took an AFB apart to remember much about them. You might try some sort of insulation on the metal fuel line from the mechanical pump (if you have that sort of stock set-up); in the old days guys at the drag strip would wrap aluminum foil around the metal line. Probably an under carb spacer (phenolic) would help.