Can anybody solve this hot start issue? I'm out of ideas!
A couple of us already figured out why this happens and it is discussed in the "Eddies and Ethanol" thread.
I'll find the link.
Here it is,
http://www.forabodiesonly.com/mopar/showthread.php?t=198778
We are trying to figure out a decent low cost solution to the problem as it is pretty comon to Eddie carbs.
We have the exact same issue with ours, and we live in similar climates, so we know that it is the heat causing it.
You have the exact carb we do also.
I think the cause is probably simpler than you think. The 4140 style Holleys have the float bowls up away (not in contact) with the manifold, and surely must get SOME airflow, as well as "not so much" conduction through the metal of the manifold/ carb
Edelbrock, on the other hand, is just like a pan on a stove burner.
What you guys discussed in your referenced thread is pretty much just what I did:
Electric pump
Do the best you can with insulating/ rerouting the fuel line
Use a carb spacer/ and insulator
Install a vapor recovery system. The vapor recovery not only keeps a small amount of fuel circulating, it also nearly immediately dumps fuel pressure in the line to zero on shutdown, and provides a path for boiling/ pressure buildup, so that fuel is not so badly forced past the needle/ seats under pressure.
I still have not .....uh.... "finalized" my fuel line routing, and am presently running the electric pump through the mechanical. On very hot days, it sometimes STILL requires a part throttle, 5-10 second crank, but this is intermittent.
I expect that when I remove the mechanical pump, and get the line fully insulated, as well as a little shield between the line/ headers, even this will improve.