Engine/Transmission (1998.5 - 2002) max inlet press to carter pump

[982500]

Does anyone know what the maximum pressure the carter lift can recieve? I'm installing a pusher pump at the tank and I need to know if I have to regulate it down, the pump I'm using puts out about 15lbs thanks Mike

 

[KTobin]

From what I gather, you're asking if you can put a 15 lb pusher at the tank to run in series with your stock Carter lift pump. If so, I wouldn't go with it. Your overall pressure @ your engine mounted stock lift pump outlet will be the sum of both pumps. Therefore, if you have a "good" stock lift pump, it should put out about 15 psi, and combined with a 15 psi pusher will result in somewhere at or less than 30 lb. Many here, including myself, have gone with a Carter 4600 pusher with 7 psi and 100gpm output. With a pusher bypass and a high flow/low flow check valve, you can maintain a safer 18-21 psi @ idle and 10psi @WOT.

I

 

[982500]

Is that for a 98? I thought pressure after99-00 were higher

 

[R-N-R]

I installed two 15psi pumps. I placed a regulator set at 17psi between the filter and the VP. This will drive your cost up a bit over $100 depending on what type of connectors you use. Pushlock look great but they are considerably more $ than "standard" hardware barbed fittings. I have read that the carter aftermarket pumps do not allow flow when they are not operating. Therefore I placed a bypass on the frame mounted pump. Mine is similar to Gary's but I used a ball valve instead of a one-way valve ($60 or cheap is you follow Gary's example). I also placed a ball valve first in the line from the tank side to enable working on the system without potentially syphoning from the tank. . I believe that this setup will allow me to operate with approx 10psi at cruise (based on readings from the engine mounted pump within 2 months of replacement) from a single pump if (when) one of the set fails.



Doing all of this without replacing your lines and fittings at least between the engine mounted LP/Filter and Filter/VP is kind of like pi$$ing in the wind. There are several fitting & line/pump kits available from vendors, I used a kit from TDR member OPoole, modified to accommodate the regulator.



You will approach the cost of a FASS system with buying a replacement LP, a kit with lines, fittings and a frame mounted LP, and then adding in the regulator, ball valves, and fittings for the bypass. Figuring out and sourcing the parts yourself, with standard lines and fittings will save a fair amount of cost, but you will most likely have some waste due to extra fittings and hose.



Just my $0. 02

R-N-R



Edit:

Gary's

Mine

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