Fuel Line Gurus -- quick question
Thread Starter
Racer
Joined: May 2001
Posts: 401
Likes: 0
From: Carlsbad CA
Fuel Line Gurus -- quick question
I'll keep it short- I'm converting to EFI, and I have a suitable high pressure inline pump that I'd like to use, but the outlet barb fitting is 5/16". What is the best method to connect that to 3/8 tubing? I intend to use the 3/8 existing fuel line for supply, and run an additional 3/8 line for the return line.
I am going to use AN-6 fittings at the fuel rail, with a GM inline high pressure filter with O-ring fittings before the rail.
Thanks,
Bob B.
I am going to use AN-6 fittings at the fuel rail, with a GM inline high pressure filter with O-ring fittings before the rail.
Thanks,
Bob B.
Thread Starter
Racer
Joined: May 2001
Posts: 401
Likes: 0
From: Carlsbad CA
I think you're right. Since the barb fitting can't be removed from the pump, my guess is that I'll have to use 5/16 hose from the bar, to another 5/16 barb fitting w/ threads, to a reducer, and start the 3/8 hardline at that point. Glad to hear someone else was thinking along those lines.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
You should be able to find a 5/16 to 3/8 barb fitting at a hardware store. My question is if the pump you have is capable of supplying enough volume, not just pressure? 5/16 sounds like some form of OEM pump????
Maybe look into getting a 255 lph walbro pump. Summit has them for I think $150. They have 3/8" barbs in & out.
Maybe look into getting a 255 lph walbro pump. Summit has them for I think $150. They have 3/8" barbs in & out.
Thread Starter
Racer
Joined: May 2001
Posts: 401
Likes: 0
From: Carlsbad CA
Zwede-
The pump is rated at 50 gph, and I'm putting a stock TPI system on a mildly modded 350, so I hope the volume will be sufficient. If not, I'll be buying a Walbro. Seems like everyone says to go with a Walbro, so I'm sure I'll upgrade soon enough.
The pump is rated at 50 gph, and I'm putting a stock TPI system on a mildly modded 350, so I hope the volume will be sufficient. If not, I'll be buying a Walbro. Seems like everyone says to go with a Walbro, so I'm sure I'll upgrade soon enough.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
If you are using the Ford Truck pump like I am then I went to the junkyard and found a plastic Ford line that used 3/8 tubing onto their quick-connect. I carefully cut the tubing away and clamped the new 3/8 hose to the fitting. I clamped the other end of the hose to the fuel line and away it goes. Use fuel injection hose clamps-available at Advance and others. For fuel line unions some use brass compression fittings. I admit I have some in mine. They are not really made for that much pressure. A better idea is steel hydraulic line unions. They are made to take high pressure.
