I'm tryin to figure out the fuel system for the dune buggy.
if yall dont know what motor it is, it's gonna be a LS-based setup, so LSX fuel pressures will be needed for the injectors

I'm thinking about ordering this pump http://cgi.ebay.com/ebaymotors/GSL39...ayphotohosting

I don't want a return setup. I'm going straight from a pickup bung on my custom fuel cell to the pump, then to the fuel rails.

do I need a FPR? will the pump shut off once the desired FP is reached? I'm new to fuel systems... the ole stock pushrod chevy is so simple lol.

thanks for the help,
jake

 

you will definitly need a fpr.

 

where do I rig it in the fuel system? before the fuel rails im assuming?

 

The closer the FPR to the rails the better. Before or after. On some factory setups it is in the tank, some just outside the tank, and others its at the rail. But you will need a return line from the FPR back to the fuel cell. The pump will run continuously.

 

how do the non-return fuel systems work? I would assume that then I wouldn't need a FPR, somehow I guess the FPR would be built-in or something like that with the pump.

I just really don't want to drain the fuel cell and let it dry for a couple days and weld another bung on it, and then run another damn line, if it comes to that, then ok, but I know there's gotta be a way to use a non-return system. anyone else? please... lol

 

Returnless systems have the FPR in the tank module along with the pump and the filter. Major mods to the fuel cell to get one of these modules in there.

 

well the pump isn't in-tank. the fuel cell was built for a sbc350. just a rectangular type cell with 1 -8AN bung on the bottom for pickup, baffled and has a dip for the pickup of course. the pump is gonna be mounted in the d-shaft tunnel just 6" from the fuel cell. inlet on pump will go to the pickup bung on the cell. and the outlet I'm assuming could go straight into a FPR and then to the rails. Will the pump ever get to pressured? like if I have the key turned to on and the pump runs and the motor isn't running, teh pump will just sit there and pump and not go over a certain PSI?
thanks again,
jake

 

The pumps don't have built in regulators/pressure switches. They just keep running. The regulator just dumps the excess fuel to maintain a constant pressure to the rails. Hence, the need for a return line off the regulator. The FPR can be placed anywhere between the pump and the rails.

 

alrighty I think I know what I wanna do.

fuel cell to pump, pump to FPR, FPR to rails. dumpoff from FPR to bung on fuel cell somewhere. thanks for the help again lol. I've just never had to jack with EFI fuel systems before, now I know.

now to find a decent price on a FPR. i'll probably have to bend over and take it for a FPR though