Piston lift pump
02-14-2006, 08:04 AM
#1
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Piston lift pump
I just wanted to mention that it seems these piston pump are hitting the hotrod gasser market as of recently. I see them as one time purchase that out performs (from what i have read) theold diaphram ones. Theycanbe rebuilt right?
Our LP look like chevy fuel pumps, even the old one i pulled off said, Delco/Remy (aka chevy). Whats up with that?
In a pinch can we use one.
Our LP look like chevy fuel pumps, even the old one i pulled off said, Delco/Remy (aka chevy). Whats up with that?
In a pinch can we use one.
02-14-2006, 12:08 PM
#2
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''In a pinch can we use one''
If you can verify that the rubber diaphram is designed for prolonged contact with diesel, otherwise, you'll end up pumping the crankcase full of #2...aside from that, most mechanical gasser pumps were for carbs, so you're looking at 5-6psi at best, which is not nearly enough to feed the Cummins, IMO. You won't see many diaphram pumps higher than that cause they'd knock the needle right of the seat in the carb at much more psi.
Like you said, the piston pump is the way to go. With bigger sticks and pump components becoming available to the diehard VE crowd, pre-IP supply pressure becomes more and more important.
If you can verify that the rubber diaphram is designed for prolonged contact with diesel, otherwise, you'll end up pumping the crankcase full of #2...aside from that, most mechanical gasser pumps were for carbs, so you're looking at 5-6psi at best, which is not nearly enough to feed the Cummins, IMO. You won't see many diaphram pumps higher than that cause they'd knock the needle right of the seat in the carb at much more psi.
Like you said, the piston pump is the way to go. With bigger sticks and pump components becoming available to the diehard VE crowd, pre-IP supply pressure becomes more and more important.
02-14-2006, 07:27 PM
#3
Adminstrator-ess
Yes, they can be rebuilt at home. Cummins has the parts - seals and a pressure spring AFAIK.
Plunger location/angle and cam lift would be big issues to watch on a non-Cummins pump, along with what Greg mentioned. One that's designed to work unregulated with a carb would be an OK match pressurewise.
Plunger location/angle and cam lift would be big issues to watch on a non-Cummins pump, along with what Greg mentioned. One that's designed to work unregulated with a carb would be an OK match pressurewise.
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