Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2959507
08/31/21 02:09 PM
08/31/21 02:09 PM
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Joined: Oct 2005
Posts: 273 Anchorage, Alaska
metallicareload
enthusiast
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enthusiast
Joined: Oct 2005
Posts: 273
Anchorage, Alaska
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I don't know how much power you plan on making (or E85?)? I use my old stainless steel 3/8" feed line as a return line, I bent a new feed line out of regular 3/8" steel tube. Has worked well with my fuel injection with an intank pump
440, 4-Speed, 3.54 1968, when Dinosaurs ruled the Earth
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2959508
08/31/21 02:10 PM
08/31/21 02:10 PM
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Joined: May 2019
Posts: 714 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 714
Lake Villa Il
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You can use the factory line for most of it. Cut off the flared ends and use a -6 a/n adapter (uses a crush type internal collet). Or just weld on the fittings.
I prefer to use teflon hose for the flexible connections as you don't get any fuel vapor smell from it. (and generally smaller outer diameter and looks nicer, in my opinion)
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2959567
08/31/21 04:01 PM
08/31/21 04:01 PM
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Joined: Jan 2003
Posts: 8,186 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,186
Plymouth, MI
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That 350 lph drop in pump is brand new, I think it's only been out a month or so. Previously the options were a 255 lph drop in pump, or the 400 lph module that also requires the fuel tank to be modified or a replacement tank installed with that sending unit interface on it.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2959577
08/31/21 04:30 PM
08/31/21 04:30 PM
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Joined: Oct 2007
Posts: 4,213 New York
polyspheric
master
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master
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Posts: 4,213
New York
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The higher the tank-mounted pump pressure (modern factory FI is 43.5 psi, or 3 bar), the smaller the feed line can be. As pressure increases, flow through a fixed line ID increases as the square root of the change. Double the psi raises the flow by 41% (2^.5 = 1.414).
Boffin Emeritus
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: AndyF]
#2959625
08/31/21 06:21 PM
08/31/21 06:21 PM
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Joined: Jul 2007
Posts: 732 eastern,Ky
70RT Charger
OP
super stock
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OP
super stock
Joined: Jul 2007
Posts: 732
eastern,Ky
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I ordered an EFi tank with the pump already installed from Holley, all from FASTMAN.I emailed Richard about the 350 pump, waiting for a reply. He sent me this regulator https://www.holley.com/products/fue...lters/filters/efi_filters/parts/162-554. I’m a newb when it comes to EFi but if this 350 pump will work it will save me a lot of work. If there’s a reason he didn’t want me to use it that’s fine also.
Last edited by 70RT Charger; 08/31/21 06:22 PM.
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2959663
08/31/21 07:43 PM
08/31/21 07:43 PM
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Joined: Dec 2016
Posts: 1,115 Usa
A39Coronet
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super stock
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Posts: 1,115
Usa
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I'll be running OE 3/8 SS line from the tank to engine compartment with E85 on my Barracuda. Hardline + limited restricted fittings, that's a ton of fuel you can move.
Holley has been coming out with a ton of good products lately, but that pump just looks so cheap I have a hard time getting over it. Love how it has everything compressed to one unit tho.
Last edited by A39Coronet; 08/31/21 07:47 PM.
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2959713
08/31/21 09:27 PM
08/31/21 09:27 PM
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Joined: Aug 2011
Posts: 2,872 Pattison Texas
CSK
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master
Joined: Aug 2011
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Pattison Texas
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Rich got back with me and he highly recommended me using a return line so I’m going with his advise. Thanks guys! I am a firm believer in a return set up from front to back, I also have found I had to insulate all my fuel lines & the pressure regulator from heat,if not it heats up the fuel in the tank, I drive my car a lot & its hot here in Southeast Tx , , I have the Tanks Inc 450lph pump & tank. I
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: CSK]
#2959794
09/01/21 07:31 AM
09/01/21 07:31 AM
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Joined: Jul 2007
Posts: 732 eastern,Ky
70RT Charger
OP
super stock
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OP
super stock
Joined: Jul 2007
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eastern,Ky
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Rich got back with me and he highly recommended me using a return line so I’m going with his advise. Thanks guys! I am a firm believer in a return set up from front to back, I also have found I had to insulate all my fuel lines & the pressure regulator from heat,if not it heats up the fuel in the tank, I drive my car a lot & its hot here in Southeast Tx , , I have the Tanks Inc 450lph pump & tank. I What did you use to insulate the lines and regulator with?
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: A39Coronet]
#2959796
09/01/21 07:34 AM
09/01/21 07:34 AM
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Joined: Jul 2007
Posts: 732 eastern,Ky
70RT Charger
OP
super stock
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OP
super stock
Joined: Jul 2007
Posts: 732
eastern,Ky
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I'll be running OE 3/8 SS line from the tank to engine compartment with E85 on my Barracuda. Hardline + limited restricted fittings, that's a ton of fuel you can move.
Holley has been coming out with a ton of good products lately, but that pump just looks so cheap I have a hard time getting over it. Love how it has everything compressed to one unit tho. That’s the lines I’ll use and I’m going to use the pump that FASTMAN recommended.
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: CSK]
#2959809
09/01/21 08:46 AM
09/01/21 08:46 AM
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Joined: May 2019
Posts: 714 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 714
Lake Villa Il
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I am a firm believer in a return set up from front to back
That is my preference as well. Regulating inside the tank works of course but doesn't compensate for any pressure drop across the feed line/fittings. So with in tank regulation, you can see pressure drop slightly with higher fuel demands even if it's within the normal capacity of the pump.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 80fbody]
#2959893
09/01/21 12:53 PM
09/01/21 12:53 PM
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Joined: May 2019
Posts: 714 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 714
Lake Villa Il
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I like the Goodridge 910 hose/fittings fwiw. Lots of flexibility and easy to work with.
Last edited by INTMD8; 09/01/21 12:54 PM.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: INTMD8]
#2959894
09/01/21 12:53 PM
09/01/21 12:53 PM
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Joined: Jul 2007
Posts: 732 eastern,Ky
70RT Charger
OP
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OP
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Posts: 732
eastern,Ky
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You can use the factory line for most of it. Cut off the flared ends and use a -6 a/n adapter (uses a crush type internal collet). Or just weld on the fittings.
I prefer to use teflon hose for the flexible connections as you don't get any fuel vapor smell from it. (and generally smaller outer diameter and looks nicer, in my opinion) If you used the adapters and a return line could you tell me how many adapters you used?
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Re: Needing help picking out fuel lines for my Fi Set up
[Re: 70RT Charger]
#2960200
09/02/21 05:14 AM
09/02/21 05:14 AM
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Joined: Aug 2005
Posts: 762 Southington Ct.
turbobitt
super stock
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super stock
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Southington Ct.
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I used the factory style hard line, Hemi sized 3/8 supply and bought a regular BB/SB 5/16 line for the return and ran them side by side. I flared the factory line with the GM push-on style o-ring fittings and bought the appropriate adapters. For example Russell Performance 644133. AG.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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