How do I stop vapor lock?

middleagecrisis said
FWIW, The clear filters will not fill completely up with fuel when the motor is running. Half full is all I've ever observed when running, and I never had any issues with fuel starvation. Primary symptom of vapor lock is hard starting after the car has set hot for a few minutes. Are you having this problem?

When I was bracket racing back in the '70's I used a Holley electric fuel pump, fuel pressure regulator mounted on the passenger side fender, then a "Y" to two clear fuel filters, each one going to the front and rear fuel bowl of a Holley Double pumper. When I added an aluminum cool can in fuel line before the regulator, I experimented with both dry ice and then regular ice in the cool can (dry ice was too expensive). The end result with regular ice was that the clear filters went from looking half full to looking completely full! That cooler fuel in the lines must have been able to purge out the vapor that normally hides in the fuel filters. Horsepower increase? Who knows, but never experienced vapor lock.