Moparboss
Well Known Member
Good day fellas,
My 1959 Impala 348 TriPower is having some vapor lock issues when it’s real hot outside and I run the A/C in heavy traffic. I have installed an electric fuel pump back by the tank and it has helped allot. When there is allot of heat under the hood it starts to vapor lock. However the electric pump keeps it running. My next step is to install a Vapor Separator fuel filter and run a return line back to the vent nipple on the fuel tank. My question is does that nipple have a built in orfice or is it an open line. The reason I ask that question is because I need to get the correct fuel filter. One of the filters has a built in orfice for tanks that do not have orfice in return/vent nipple. The other is a no orfice filter for tanks that do have an orfice in the vent/return nipple. It is critical from what I understand to have the correct filter to maintain fuel pressure correctly. Once again thanks in advance fellas.
My 1959 Impala 348 TriPower is having some vapor lock issues when it’s real hot outside and I run the A/C in heavy traffic. I have installed an electric fuel pump back by the tank and it has helped allot. When there is allot of heat under the hood it starts to vapor lock. However the electric pump keeps it running. My next step is to install a Vapor Separator fuel filter and run a return line back to the vent nipple on the fuel tank. My question is does that nipple have a built in orfice or is it an open line. The reason I ask that question is because I need to get the correct fuel filter. One of the filters has a built in orfice for tanks that do not have orfice in return/vent nipple. The other is a no orfice filter for tanks that do have an orfice in the vent/return nipple. It is critical from what I understand to have the correct filter to maintain fuel pressure correctly. Once again thanks in advance fellas.
