Vapor lock

Tech Question Jon Mickley, Bossier City, LA, 1972 Plymouth Roadrunner 440 I'm restoring my one owner (me) Roadrunner. The engine is mildly modified with a Comp Cam, roller rockers, Schumacherheaders, and .030 over pistons, and an…

Tech Question Dennis Bartnik, Red Lion PA, 1985 Dodge D150 1/2 ton 318 I have a stock 318, 2bbl carb, Holley electric fuel pump,with regulator valve set anywhere from 2 to 5 1/2 PSI and still it "vaporlocks" constantly. Why?…