i have my car set up with TPI fuel line's and am going to be switching it over to carberated not i dont feel like putting the carbeated lines and sending unti back in so i was just gonna run with the electric pump and get a regulator now can any one recomend which regulator to get and what about the fiitings, do i have to get those Accel one to switch it over to 6AN???

 

I'm not sure how good it will be to run the TPI pump regulated down to 6 psi for a carb. TPI puts out something like 40-45psi... I bet it will shorten the pump life considerably. Maybe someone else out there has done it with good results, but I wouldn't do it on my vehicle.

If you want to keep things simple, just drop the tank and convert to a mechanical pump. Second option would be to install a TBI pump instead of the TPI pump and regulate THAT--14psi down to 6psi is a much better idea in my book, and that's what I'm running in my car.

Make sure to use a return style regulator--I use the Holley 12-803BP (Summit PN HLY-12-803BP).

 

ahhh u are right cuz i set up my buddy car to run carb but his was a TBI and i thuink he was running a mallory 3 port or mabey 4 with a plug in one

i still have my carb sending unit---i knew i saved it for a reason

 

A pump builds pressure by having the flow restricted. A TPI pump only puts out 40+ psi when the return flow is orificed down. A TPI pump in a TBI system will put out 9-10 psi, because that's what the TBI reg allows - the excess flow is returned to the tank. A TBI-specific pump will have less flow capability than a TPI pump because it doesn't need to build up as much pressure.

When regulated down with a return-style regulator, a TPI pump will work fine with a carb. The Mallory 4309 is such a reg - the number of ports is moot, because you can have a dead-heading reg with multiple outlet ports. What's important for using a factory in-tank electric pump is that it is regulated with a return-style regulator. The constant flow through the pump cools it and keeps it from burning out. It will last longer, theoretically, in a carb system than it will in a TPI system.

Installing a return-style reg is probably easier than dropping the tank. Sooner or later, the factory pump will wear out/fail, so you'll be dropping the tank sometime, anyway. When/why you do that is up to you, but in my mind, an in-tank electric pusher pump with a constant return is the ideal set-up with a carb for prevention of vapor lock.

 

its probably not "correct" but its worked for 3 years for me and a few others i know, i just left my in tank pump, put an inline holley red where the fuel filter goes, and pull through the stocker. Ive got a filter and a guage right at the carb and it reads 8psi all through the band.

 

I've run my TPI pump threw my mallory regulator for 7 years now and have had no problems at all.

 

I stand corrected. I suppose that shows how much I know about TPI, huh?

 

I am running the mallory return style AFPR also with a TPI pump.

I wired the pump to a 12v source when the key is on. I would like to fix it so that it primes like factory instead of continous running. If I have the key on and not started, it fill the float bowls up.

 

you might want to think about,
keeping the TPI regulator,
and hooking the supply side to a deadhead 6psi regulator.

that will, keep fuel constantly flowing out of the fuel pump,
because the TPI regulator is still in place,
but allow the use of a low cost carb regulator

 

does anyone ahve a p/n for the regulators they are using w/ the return lines?

 

Try mallor part#4309

Here at summitracing.com Mallory Fuel Pressure Regulators: MAA-4309 - summitracing.com

 

Have you or anyone you know tried that? By "supply side", do you mean the output of the TPI reg?

I would imagine plumbing that would not be exactly straight-forward.