Mechanical Fuel Pump Choice 340 stock Street Demon 625 Carb

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J

jb123

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Mechanical Fuel Pump Choice 340 stock engine daily driver Street Demon 625 Carb

GPH? That is the question number one

Regulator is the question #2

GPH? 80, 110? Do I need a regulator? Up to what pressure is necessary? Any info etc...

Thanks - JB
 
Just about any old Mechanical pump will fuel that beast.
But Ima thinkin the stock 340 pump will be just fine.Even with the stock 5/16 line. I would replace all the rubber lines and the filter(use a metal can) and check the in-tank sock.Use as little rubber line as possible. Fabricate a metal line from the pump to the carb, if you have to. I put the metal filter on the suction side of the pump. It's harder to change, but I put a big one on there, back near the tank, and it's been on there since 1999.
For peace of mind or in readiness for future upgrades; the Carter M6902, hi-volume pump is very good. I have had this one on my 360, since 1999 as well, with a 750DP, and it goes to the big end,easy. No regulator,no return. A 3/8 line is recommended for extended high-rpm operation;All the way into the tank
 
i put a stock mechanical pump on a 340 with a stout cam and 770 holly street avenger carb . works fine over 6000rpm i thought i would need to upgrade but not yet.
 
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