Third Generation F-Body Message Boards

Third Generation F-Body Message Boards (https://www.thirdgen.org/forums/)

- TBI (https://www.thirdgen.org/forums/tbi/)

- - fuel line size (https://www.thirdgen.org/forums/tbi/711698-fuel-line-size.html)

ziggy89

11-23-2014 05:18 PM

fuel line size

Anybody know what size the supply and return fuel lines are for a 91 tb car?

RBob	11-24-2014 07:54 AM

Re: fuel line size

They are likely a metric size, however, 3/8" feed and 5/16" return are close enough.

RBob.

Fast355

11-24-2014 08:14 AM

Re: fuel line size

Quote:

Originally Posted by RBob (Post 5846107)

They are likely a metric size, however, 3/8" feed and 5/16" return are close enough.

RBob.

He might be talking about the fitting size. Its actually a 12mm metric saginaw powersteering fitting. You can get adapters to screw into the fuel fittings on the throttle body and go straight to -6AN fittings. I use these on TBI conversions and external regulator installations.

http://www.jegs.com/i/Russell/799/640800/10002/-1

ziggy89

11-24-2014 01:46 PM

Re: fuel line size

3/8 and 5/16 is what I was looking for. I run a walbro 255 to a return style regulator for a carb. planning another motor build with nos. just trying to calculate if it will support my needs or if I need to upgrade pump and fuel lines.

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