Re: Anybody got the end all cure for vapor locking?

Posted by DavidM On 2021/12/31 2:34:14

Kerosene added to the fuel works better than diesel. Add as much as you can get with a minimum of 10%. Also avoid fuel with ethanol.
I have had two 1929 Packards and both suffered vapor lock in hot weather especially stop-start driving and hill climbing.
When all else fails, carry a bottle of water to wet and cool the carburetor, this gives almost instantaneous relief but only for a very short time.
A fuel circulation system with a return line to the tank can work but the return line flow has to be regulated to prevent starving the carburetor under high fuel demand.
There is no easy fix.