Re: Wes's Maroon 1947 Custom Super Clipper

Posted by JWL On 2020/10/23 13:12:58
Wes, wrapping the pump to carb fuel line is probably over kill. This line is pressurized and not prone to vapor lock. Vapor lock will occur in the suction side of the fuel pump and the fuel bowl of the carb. The shield - missing on your Clipper - is intended to keep heat away from the pump. My Custom Clipper also had a small sheet metal shield under the carb along with a thick insulating gasket. Does your Clipper have these?

Also, you may want to consider installing an insulation kit for the pump. It consists of a thick insulating gasket between the pump and block, insulating sleeves for the bolt holes and insulating washers that go next to the pump and under the steel flat washers.

All this will help but not fully prevent vapor lock.

I had good luck adding a gallon of diesel fuel to a tank of gasoline. This stopped the vapor locking in my Custom Clipper in hot and humid Austin weather and heavy stop and go traffic. No noticeable side effects from the diesel fuel were noted.

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