PackRat239
Full Access Member
You cant use galvanized fittings with diesel. The coating comes off and ruins things. Black iron or SS.
You cant use galvanized fittings with diesel. The coating comes off and ruins things. Black iron or SS.
I think there is a lot of people getting confused about the "high pressure" part of this pump setup. Its only a High pressure pump because its capable of high pressure, not because its always going to run high pressure. If you were to deadhead the pump, yes, you would have high pressure, however, that is the whole point of the bypass regulator. The fuel pump will have a constant supply of 70+gph circulating, and the regulator determines the pressure of the supply to the IP, the only pressure on the return side is going to be caused by the restriction in the return system.
Even if the return necked down to 1/4" in some spots, it would take 180gph to cause 8psi in the return system, and that is if the IP was using no fuel. 70gph should only put a couple of psi on the return system, and it should handle that just fine. (If we have any engineers here that would like to check those numbers, that would be great)
The FSV would only be seeing as much pressure as the regulator was set to, and it should be able to handle 6'ish PSI no problem.
On my truck at 2k in park, return line pressure was 2 psi.(selector on rear tank) Slowly pinching the return line would kill the engine when the needle would hit 4 psi.
where did you have the gauge at? go for a drive and see what the pressure is......there is no load on the engine in park...
where did you have the gauge at? go for a drive and see what the pressure is......there is no load on the engine in park...
gauge was between return fitting at injection pump and the hardline that goes to the back of the engine. And yes, no load. I was trying to diagnose an intermittent stall after switching tanks. Bad tank valve was partially blocking return intermittently and stalling engine. My numbers above were after a good valve was installed.