C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

Fuel Line Suggestions

 
Old 11-29-2018, 10:25 PM
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jpatrick62
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Default Fuel Line Suggestions

Hello,

Was hoping to get some ideas about what others were doing for the fuel line that runs from the fuel pump on a '69 L46 engine. The original manifold and carb were replaced by an Edelbrock manifold and Holley double pumper.
The last owner has rubber fuel lines running to and from a fuel filter installed in the middle, and I would like a system (from the fuel pump to both carb inlets) that was completely metal tubing or metal flex lines. The only metal lines I have now
is from the fuel pump and then a special chrome line made for a Holley double pumper. (See pic below)



I'd be grateful for any ideas (especially pics) of your setups that are all metal or metal braided. I absolutely do not want rubber fuel lines near a hot engine.
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Old 11-29-2018, 10:36 PM
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ddawson
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I have a BBC but I used the LS6 fuel line as LS6 used a Holley Carb.

Take a look at the LT1 fuel line. It should be very close.
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Old 11-30-2018, 12:25 AM
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lars
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Rubber lines on the pressure side of the pump is a bad idea. If you have an aftermarket carb, you will need to fabricate custom lines. E-mail me for a how-to paper on building your own steel lines.

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Old 11-30-2018, 11:59 AM
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jim-81
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Here is my thread from several months ago: https://www.corvetteforum.com/forums...fuel-pump.html where I converted from a braided stainless line to a bent 3/8 hard line. This was part of another project to get a pressure regulator in there. I used Lars' paper on fabbing a metal fuel line and it's good. It takes a while to get the bends right and sometimes you have to start over but the tubing is cheap and it's sort of fun. My setup is a little different in that I have an Edelbrock carb and I have the regulator in there but from the fuel pump up I think it might help you.

Jim
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Old 11-30-2018, 12:08 PM
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cardo0
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Originally Posted by jim-81 View Post
Here is my thread from several months ago: https://www.corvetteforum.com/forums...fuel-pump.html where I converted from a braided stainless line to a bent 3/8 hard line. This was part of another project to get a pressure regulator in there. I used Lars' paper on fabbing a metal fuel line and it's good. It takes a while to get the bends right and sometimes you have to start over but the tubing is cheap and it's sort of fun. My setup is a little different in that I have an Edelbrock carb and I have the regulator in there but from the fuel pump up I think it might help you.

Jim
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Old 11-30-2018, 07:05 PM
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jpatrick62
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Thanks to all for your replies. Once I get the how-to from Lars I will make my own fuel lines. The car itself has a very solid frame and looks nice, but these
are some of the issues I want to straighten out before I use it for leisure drives in the summer.
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Old 11-30-2018, 08:23 PM
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Originally Posted by jpatrick62 View Post
Thanks to all for your replies. Once I get the how-to from Lars I will make my own fuel lines. The car itself has a very solid frame and looks nice, but these
are some of the issues I want to straighten out before I use it for leisure drives in the summer.
good move!
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Old 12-02-2018, 12:49 AM
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7T1vette
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Follow Lars' advice. But, I suggest that you buy copper-nickel tubing instead of steel (or stainless) brake/fuel line. It is sooooo much easier to bend and form double flare joints. The price is about twice what steel lines cost. But since you only need a few feet, go for the convenience.
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Old 12-02-2018, 07:15 AM
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squared
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Copper nickel is the way to go. I've used stainless, but the copper nickel lines are easier to bend, available at your local auto parts store, (brake line) and doesn't spark like some stainless. Coast guard regs specify it for that reason. I like to finish the line with a good braided fiberglass heat shield tube to guard against vapor lock and it looks good, available on eBay.

Last edited by squared; 12-02-2018 at 07:16 AM.
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Old 12-02-2018, 09:47 AM
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I'll echo what 7T1 and squared said, cunifer or nicopp is the way to go. Makes your life easier where you have those short lengths before bends, not to mention looks very cool when polished. Standard on Volvo cars for years.

https://www.ebay.com/itm/Copper-Nick...oAAOSwwXRb~ZL8
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Old 12-02-2018, 09:59 AM
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I just installed the copper nickel lines on my car and they are easy to work with. Here is a picture of vapor line!

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