boiling fuel

[wtm442]

Originally Posted by Power Surge

If you've got 8 psi in one bowl and 5 in the other from some odd fuel log, flow path, or heat related issue, atmospheric pressure is not going to "equalize" the fuel pressure in the bowls.

The pressure inside the primary and secondary bowls of a Holley carb are always at the same pressure .... atmospheric pressure (the pressure inside the air cleaner) ... which is approx 14.696 PSIA at sea level or Zero PSIG

Of course, the fuel pressure inside the fuel line just before the needle and seat of the two bowls "could" be different only if there was a tremendous restriction or blockage inside the fuel line(s) leading to the needle & seats.

Originally Posted by Mr Magoo

I wrapped my line from the pump to the carb, added a Holley heat shield with spacer, laid a piece of reflective insulating pad underneath the fuel log and just generally tried to eliminate obvious points of heat transfer. I like the results. The car doesn't get doggy when it's hot like it used to.

I'm seriously considering getting rid of the braided steel lines for fuel entirely and going with rubber and insulation, but no urgency at this point.

No need to get rid of the braided stainless. With the heat insulation, the small amount of heat transfer that would be eliminated would be minimal. If you need further temperature reduction to avoid percolation you need to increase the amount of outside air that flows thru the engine compartment. But that is very difficult to do when the car is stuck in stop and go traffic. Therefore, the next step, if needed would be to add a return line to the gas tank.