Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Fuel System Return Line
I don't believe fuel reurn lines were installed into Camaros until 71 or 72 for Carbon Canisters which filtered Fuel Vapor and utilized pressurized fuel tanks. 69 and 70's had Vented Gas Caps. If you running an electric Fuel pump, I recommend a return line with a Pressure Gauge delivering a constant 6 to 8 PSI to the Carb. The return line with Gauge allows the pump to free wheel without cavitation and over heating due to dead end pressure and would guess easier on the fuel inlet valves of the carb.
Correct me here, but I think the regulator should be after the carb gets the 6-8 psi, then the regulator on to the return line. Like at the end of the fuel log. What I was doing when running an electric pump.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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