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fuel pump return regulator suggestions needed please #2780734
06/02/20 02:15 PM
06/02/20 02:15 PM
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north of coder
moparx Offline OP
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moparx  Offline OP
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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

Re: fuel pump return regulator suggestions needed please [Re: moparx] #2780748
06/02/20 02:38 PM
06/02/20 02:38 PM
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Ambridge, Pa.
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rickraw Online content
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I believe aeromotive has a regulator that can be used for carb n efi by changing the spring.

Re: fuel pump return regulator suggestions needed please [Re: rickraw] #2780783
06/02/20 03:41 PM
06/02/20 03:41 PM
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Anderson, IN
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1969RR Offline
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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

Re: fuel pump return regulator suggestions needed please [Re: 1969RR] #2780866
06/02/20 07:26 PM
06/02/20 07:26 PM
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Re: fuel pump return regulator suggestions needed please [Re: BloFish] #2780867
06/02/20 07:33 PM
06/02/20 07:33 PM
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https://aeromotiveinc.com/product/x1-series-carb-bypass/
I’m using this one, because I’m never going to with EFI.

50120536-4953-46C2-A534-84F7039A5F47.jpeg

It really doesn't matter whether you win or lose…
as long as you look good doing it!

‘65 A100
‘69 ‘Cuda
‘73 Vega GT
‘06 Mega Cab
‘14 Mercedes SLK
Re: fuel pump return regulator suggestions needed please [Re: BloFish] #2781133
06/03/20 05:00 PM
06/03/20 05:00 PM
Joined: Sep 2003
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north of coder
moparx Offline OP
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thanks for the replies ! up
now, decisions, decisions......... work
beer

Re: fuel pump return regulator suggestions needed please [Re: moparx] #2781247
06/03/20 10:42 PM
06/03/20 10:42 PM
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Not really, Aeromotive is top notch. Just my .02


It really doesn't matter whether you win or lose…
as long as you look good doing it!

‘65 A100
‘69 ‘Cuda
‘73 Vega GT
‘06 Mega Cab
‘14 Mercedes SLK
Re: fuel pump return regulator suggestions needed please [Re: moparx] #2781251
06/03/20 10:51 PM
06/03/20 10:51 PM
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Romeo MI
MR_P_BODY Offline
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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

Re: fuel pump return regulator suggestions needed please [Re: BloFish] #2781333
06/04/20 10:28 AM
06/04/20 10:28 AM
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moparx Offline OP
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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

Re: fuel pump return regulator suggestions needed please [Re: moparx] #2781342
06/04/20 11:11 AM
06/04/20 11:11 AM
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Romeo MI
MR_P_BODY Offline
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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

Re: fuel pump return regulator suggestions needed please [Re: moparx] #2781443
06/04/20 05:08 PM
06/04/20 05:08 PM
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Ambridge, Pa.
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rickraw Online content
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You should put a tube in about 1/2” up from the bottom, that way there won’t be any fuel aeration.

Re: fuel pump return regulator suggestions needed please [Re: rickraw] #2781709
06/05/20 12:38 PM
06/05/20 12:38 PM
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north of coder
moparx Offline OP
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1/2" [or so] from the bottom pointing away from the pickup it will be.

THANKS guys ! bow
beer

Re: fuel pump return regulator suggestions needed please [Re: moparx] #2781730
06/05/20 01:34 PM
06/05/20 01:34 PM
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Romeo MI
MR_P_BODY Offline
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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

Last edited by MR_P_BODY; 06/05/20 01:36 PM.
Re: fuel pump return regulator suggestions needed please [Re: MR_P_BODY] #2781764
06/05/20 02:23 PM
06/05/20 02:23 PM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline OP
"Butt Crack Bob"
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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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