I have the return lines figured out, but now i need to figure out the fuel feed lines. I want to go -6 AN. I have the HRC in-line fuel pump. What size fitting screws into the hrc in-line pump, also will i need a fitting for the fuel rail, what kind of fitting od I use? I will be using a -6 AN fuel filter along the line as well, anyone that can help would be great.

Work in progress
98 GS t3/t04e, hrc Sidemount, tial 38mm, HKS ssq bov, clutchmaster stage 4, wiseco pistons, Eagle rods, Apexi TT, HKS EVC II, Phantom grip lsd, 3in turbo back, Eibach pro-kit, Defi D-gauge EGT,boost, autometer fuel pressure
8-inj setup in the works, HKS AIC III and 450cc injectors

if you have a 3/8 feed line you're not going to want a 3/8 return line

in other words you dont want the feed and return the same size if thats what you're thinking of doing

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96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com

So I should just stick with the factory feed, and a -6 an return?

Work in progress
98 GS t3/t04e, hrc Sidemount, tial 38mm, HKS ssq bov, clutchmaster stage 4, wiseco pistons, Eagle rods, Apexi TT, HKS EVC II, Phantom grip lsd, 3in turbo back, Eibach pro-kit, Defi D-gauge EGT,boost, autometer fuel pressure
8-inj setup in the works, HKS AIC III and 450cc injectors

Alright i have been trying to figure this out, I was told that having the same size feed and return is not a good idea. A few questions.
1) If I go with a -6 AN feed, should I go with a -4 AN return?
2) From the test port to the S-FMU is this part of the "return" portion, or feed?
3) What size lines should connect the S-FMU to the test port? -4 AN? Will -6 AN be a problem?
4) Can I run -6 AN all the way? or keep a -6 AN feed, and -4 return from the test port back?

Work in progress
98 GS t3/t04e, hrc Sidemount, tial 38mm, HKS ssq bov, clutchmaster stage 4, wiseco pistons, Eagle rods, Apexi TT, HKS EVC II, Phantom grip lsd, 3in turbo back, Eibach pro-kit, Defi D-gauge EGT,boost, autometer fuel pressure
8-inj setup in the works, HKS AIC III and 450cc injectors

Dude... full -6AN (3/8") fuel plumbing will work just fine. My fuel system consists of a Holley in-tank fuel pump, -6AN ss braided feed line, modified fuel rail for -6AN inlet and -6AN outlet, Aeromotive injected bypass regulator, and -6AN aluminum return line. It's been a great system for me, and I use a LOT of fuel with 720cc injectors. I'm sure it'd work just as well for you with the RR-FPR, can't see why that would change anything really.

Why isn't it a good idea to use -6an throughout?

Its just fine to use 6an throughout, i think Turbo8u's point was just that it overkill. I cant understand anyone who runs a 3/8 feed line and then runs another return line. The facotry line is 5/16.....are you afraid to use that as a return? In the end you only have to run one line...the 3/8 feed.

Terry

96 Eagle talon ESI
Star Stage II - Boost/oil/EGT gauges

97 Eclipse
Greddy header/evo exhaust - Stage 2 6 puck Sprung hub MIBA clutch - Shortened shifter - Koni Yellows w/eibach prokit - Stillen Fr/Rr swaybars - ceramic intake - DEI Keyless entry alarm - Niche 17" Shoks

Waiting to be installed: Apexi AFC, HKS EVC IV, 450 Turbo injectors, SFMU/return line, GSX Front brakes (need rotors)

I'm really not worried about the return, I just wanted a nice safe fuel setup that I would never have to mess with. I want to be able to give my car allI got and not have to worry about a fuel line busting or something.

Work in progress
98 GS t3/t04e, hrc Sidemount, tial 38mm, HKS ssq bov, clutchmaster stage 4, wiseco pistons, Eagle rods, Apexi TT, HKS EVC II, Phantom grip lsd, 3in turbo back, Eibach pro-kit, Defi D-gauge EGT,boost, autometer fuel pressure
8-inj setup in the works, HKS AIC III and 450cc injectors

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com

clamps are your best friend too

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com