Thread: Too Much heat, too little engine compartment

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Run an electric fuel pump in or near the tank. Even if the fuel boils out of the carb, you will be able to reprime it easily.

You could just plumb it into the line running to the mech pump, but I have had trouble with this type of setup in the past. I had one pump that had the diaphragm come unhooked in the pump because the electric pump pressure was lifting the diaphragm too high. I have never tried that again.

The Cadillac system ,IMO, would be a high pressure electric pump running to a bypass style regulator near the carb with a return line to the tank. This should be the coolest running system you could have.

An electric pump would give you some of the benefits of EFI in that the high line pressure will raise the boiling point of the fuel. In the line at least.

You seem to have covered most of the bases in keeping the carb cool. Other than running a thin stainless head shield under the carb that is larger than the carb itself, I don't know much else to do.

Also, I don't think I can avoid having a return line fitting soldered into the gas tank. What does the forum think?

Do exhaust manifold wraps aid with gas boiling problems?

Thanks for your support!