Rays74 Posted September 10, 2018 Report Share Posted September 10, 2018 (edited) Hi all, just picked up a one owner '74 620 with an interesting mod (the coiled copper surrounding the modified upper rad hose) which I can only imagine is a cold weather mod..........but the truck was and always has been a So Cal pick up. Have anyone else ever seen this strange mod? I can see warming the carb ala aircraft but heating the fuel line?? Fast lane to vapor lock me thinks.....all else is absolutely dead stock. Strange to me.... lol -- Ray Edited September 10, 2018 by Rays74 Quote Link to comment
datzenmike Posted September 10, 2018 Report Share Posted September 10, 2018 Yeah that is retarded. The L20B engines have a return line so cool gas is constantly circulated past the carb to prevent hard starts from vapor lock. Even on a mountain top, gas won't freeze. The 620 uses air warmed by the hot exhaust to help vaporize the fuel when cold. That makes zero sense. Quote Link to comment
racerx Posted September 13, 2018 Report Share Posted September 13, 2018 Its a flux capacitor Quote Link to comment
thisismatt Posted September 13, 2018 Report Share Posted September 13, 2018 The gas is actually cooling the coolant, duh... Quote Link to comment
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