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fuel pump return regulator suggestions needed please

Posted By: moparx

fuel pump return regulator suggestions needed please - 06/02/20 06:15 PM

i am installing an aeromotive 340lph pump into the tank of my 69 charger.
the system will have a 1/2" return, but will start out carburated, with a possible TBI [sniper] in the future.
as i would like to plumb this once, what return style regulator is recommended for this installation, and why ?

TIA as always for the help ! bow
beer
Posted By: rickraw

Re: fuel pump return regulator suggestions needed please - 06/02/20 06:38 PM

I believe aeromotive has a regulator that can be used for carb n efi by changing the spring.
Posted By: 1969RR

Re: fuel pump return regulator suggestions needed please - 06/02/20 07:41 PM

EFIsystempro.com
That is where I purchased mine. Comes with a carburated spring installed along with a EFI spring when you need 60psi. They actually have a bunch of different regulators
to choose from. Jeff
Posted By: BloFish

Re: fuel pump return regulator suggestions needed please - 06/02/20 11:26 PM

https://aeromotiveinc.com/product/universal-bypass-regulator/

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Posted By: BloFish

Re: fuel pump return regulator suggestions needed please - 06/02/20 11:33 PM

https://aeromotiveinc.com/product/x1-series-carb-bypass/
I’m using this one, because I’m never going to with EFI.

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Posted By: moparx

Re: fuel pump return regulator suggestions needed please - 06/03/20 09:00 PM

thanks for the replies ! up
now, decisions, decisions......... work
beer
Posted By: BloFish

Re: fuel pump return regulator suggestions needed please - 06/04/20 02:42 AM

Not really, Aeromotive is top notch. Just my .02
Posted By: MR_P_BODY

Re: fuel pump return regulator suggestions needed please - 06/04/20 02:51 AM

When when I was running s carb and a return I ran the Mallory 4 hole.. it came with
2 springs.. carb and efi
wave
Posted By: moparx

Re: fuel pump return regulator suggestions needed please - 06/04/20 02:28 PM




i decided to use this one as a match to my 340lph pump.
i have a 3/8" feed now, and i'm going to make a 1/2" return. if there is any corrosion or gunk in the feed line [new in 2000, but has sat with gas since 2007] i probably will increase the feed to 1/2".
how far off the bottom of the tank should the return line be ? should it point any direction other than straight down ?
beer
Posted By: MR_P_BODY

Re: fuel pump return regulator suggestions needed please - 06/04/20 03:11 PM

Originally Posted by moparx



i decided to use this one as a match to my 340lph pump.
i have a 3/8" feed now, and i'm going to make a 1/2" return. if there is any corrosion or gunk in the feed line [new in 2000, but has sat with gas since 2007] i probably will increase the feed to 1/2".
how far off the bottom of the tank should the return line be ? should it point any direction other than straight down ?
beer


Normally you would point the return away from your pick up.. doent really mater how far off the bottom
wave
Posted By: rickraw

Re: fuel pump return regulator suggestions needed please - 06/04/20 09:08 PM

You should put a tube in about 1/2” up from the bottom, that way there won’t be any fuel aeration.
Posted By: moparx

Re: fuel pump return regulator suggestions needed please - 06/05/20 04:38 PM

1/2" [or so] from the bottom pointing away from the pickup it will be.

THANKS guys ! bow
beer
Posted By: MR_P_BODY

Re: fuel pump return regulator suggestions needed please - 06/05/20 05:34 PM

The 1/2" up doesnt do a thing.. in a stock design we put the return right on the bottom.. that
system is in every production Chrysler out there.. I worked in the Fuel and Exhaust lab for
35 years testing this stuff... the return just needs to be pointed away from the pick up
and the air will rise in the tank
wave
Posted By: moparx

Re: fuel pump return regulator suggestions needed please - 06/05/20 06:23 PM

thanks mr. P ! you are the guru of fuel, and i follow your advice ! bow
another question [or two]. would it be advantageous to [somewhat] flatten the outlet into an oval to prevent stirring up any junk that may accumulate ? run the return [closer] to the rear of the tank ?
also, what would be the minimum clearance around the in tank pump and pickup needed ?
if it means anything, [and i didn't mention it previously] i'm using a reproduction stainless tank from van's auto.
beer
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