L98 TPI - How to tell the difference on supply and return steel lines
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Joined: Nov 2003
Posts: 268
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From: Mid Mo.
Car: 1989 GTA - Gunmetal grey
Engine: 5.7 ltr.
Transmission: 700R4
Axle/Gears: 3:27 9 Bolt Borg Warner
L98 TPI - How to tell the difference on supply and return steel lines
The 2 steel fuel lines at the driver side where it attaches to the hoses to the fuel rail. How do you tell which line is the return, or which is the supply ?
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Joined: Feb 2021
Posts: 1,215
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From: WA
Car: 1989 IROC-Z
Engine: L98 350 TPI
Transmission: 700R4
Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: L98 TPI - How to tell the difference on supply and return steel lines
Return attaches to the regulator and I think it's smaller too.
Thread Starter
Joined: Nov 2003
Posts: 268
Likes: 1
From: Mid Mo.
Car: 1989 GTA - Gunmetal grey
Engine: 5.7 ltr.
Transmission: 700R4
Axle/Gears: 3:27 9 Bolt Borg Warner
Joined: Oct 2001
Posts: 12,228
Likes: 1,156
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: L98 TPI - How to tell the difference on supply and return steel lines
Hard line for feed is bigger, rubber feed hose is longer.
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