Quote:
Originally Posted by ford38v8
George, regarding the return line diameter, a friend used the early fuel gage line for his return. I don't know what that diameter is, but he was running a stock fuel pump, and that setup did solve his vapor lock problem.
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I figured it would solve the problem from my trips on I-95 on days 100 degrees or better. The engine ran good over 55 MPH when the fuel was flowing about full blast into the carb but slowing below 55 MPH the fuel was in the pump to long and started showing minor vapor lock. I think the oil filter restriction may be just a little to small, as far as I'm concerned the oil restriction hole is to small for the oil filter. I opened mine up 130,000 miles ago but don't remember the size. One thing I wonder is when the fuel tank is low with a hot highway and hot tank recirculating the hot fuel may loose it's effect at some point. Filling the tank with new cool fuel from an underground tank will take care of that. G.M.