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Old 02-03-2026, 03:11 PM
confern confern is offline
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Default Earls fuel line routing

Curious how everyone is routing the Earls fuel line? I’m running a Holley efi tank with an internal pump. Supply and return line to Holley fuel rails for my 5.3ls. Preferably not wanting to add or create any additional holes in the frame, body, etc. 68 camaro
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Old 02-03-2026, 04:20 PM
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ULTM8Z ULTM8Z is offline
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I ran mine along the under carriage, along the subframe... single piece lines from tank to fuel rail.

Generous helping of heat shield wrap any where near heat sources.

Also, make sure to get at teflon. The rubber stuff has become notorious for allowing vapors to bleed through and stink up the garage.

I've had my Teflon lines like this for almost 20 years now and zero issues.

Last edited by ULTM8Z; 02-04-2026 at 07:32 AM.
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camcojb (02-03-2026)
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Old 02-04-2026, 07:05 AM
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Adding a few new holes in the floorpan for clamps on the rubber lines will be needed. Better to secure it away from any heat or vibration vs having a fire.

Best option for fuel line long term is a hard line front to rear with the AN line to the tank and to the rails. Runs along the stock path. Couple clamps to hold it down and away from vibration or heat sources.

I use the Right Stuff line and cut and flare it for AN. One cut and flare near the tank. AN adapters for feed to the regulator. AN lines to the tank from the regulator. Another cut and flare near the passenger footwell area by the subframe. AN line to the fuel rail.

https://rpui.com/the-right-stuff/pre...t/Model/Camaro

I buy the Fragola premade AN lines to make my life easy. Leak free everytime. No AN lines to make that I have to pressure test for leaks. I do pressure test the entire system and blow it out before I run gas thru it.

https://www.summitracing.com/search/...0an%20fittings
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Old 02-04-2026, 04:15 PM
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I run hardline front to back roughly following the factory lines. Then short AN lines at the tank and fuel rail. I’m not comfortable running soft fuel lines front to back.
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Old 02-04-2026, 05:05 PM
confern confern is offline
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Quote:
Originally Posted by dhutton View Post
I run hardline front to back roughly following the factory lines. Then short AN lines at the tank and fuel rail. I’m not comfortable running soft fuel lines front to back.
Thank you, can I get by with just running one hard line from the tank to the fuel rails? The tank has a supply, return, and vent with the pump internal to the tank. I have the Holley fuel rails, do I need to plug one side or use a crossover, etc?
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Old 02-05-2026, 08:03 AM
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Quote:
Originally Posted by dhutton View Post
I run hardline front to back roughly following the factory lines. Then short AN lines at the tank and fuel rail. I’m not comfortable running soft fuel lines front to back.
Got it, thanks.
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Old 02-04-2026, 05:03 PM
confern confern is offline
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Quote:
Originally Posted by thedugan View Post
Adding a few new holes in the floorpan for clamps on the rubber lines will be needed. Better to secure it away from any heat or vibration vs having a fire.

Best option for fuel line long term is a hard line front to rear with the AN line to the tank and to the rails. Runs along the stock path. Couple clamps to hold it down and away from vibration or heat sources.

I use the Right Stuff line and cut and flare it for AN. One cut and flare near the tank. AN adapters for feed to the regulator. AN lines to the tank from the regulator. Another cut and flare near the passenger footwell area by the subframe. AN line to the fuel rail.

https://rpui.com/the-right-stuff/pre...t/Model/Camaro

I buy the Fragola premade AN lines to make my life easy. Leak free everytime. No AN lines to make that I have to pressure test for leaks. I do pressure test the entire system and blow it out before I run gas thru it.

https://www.summitracing.com/search/...0an%20fittings
Ok thank you for the information. I think changing to hard lines is the route to go and run them down the passenger side like the factory did with the clamps. Curious if I need 2 lines or 1 line ran total? Supply and return from the tank? Or just supply? Then supply and return at the fuel rails? Of course I need to run the regulator not sure what side and the fuel filter too.
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camcojb (02-04-2026)
  #8  
Old 02-05-2026, 12:03 PM
confern confern is offline
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Quote:
Originally Posted by thedugan View Post
Adding a few new holes in the floorpan for clamps on the rubber lines will be needed. Better to secure it away from any heat or vibration vs having a fire.

Best option for fuel line long term is a hard line front to rear with the AN line to the tank and to the rails. Runs along the stock path. Couple clamps to hold it down and away from vibration or heat sources.

I use the Right Stuff line and cut and flare it for AN. One cut and flare near the tank. AN adapters for feed to the regulator. AN lines to the tank from the regulator. Another cut and flare near the passenger footwell area by the subframe. AN line to the fuel rail.

https://rpui.com/the-right-stuff/pre...t/Model/Camaro

I buy the Fragola premade AN lines to make my life easy. Leak free everytime. No AN lines to make that I have to pressure test for leaks. I do pressure test the entire system and blow it out before I run gas thru it.

https://www.summitracing.com/search/...0an%20fittings
What size Right Stuff fuel line do you run? I see they offer 5/16" and 3/8".

Last edited by confern; 02-05-2026 at 09:29 PM.
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  #9  
Old 02-05-2026, 12:42 PM
dhutton dhutton is offline
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Quote:
Originally Posted by confern View Post
What size Right Stuff fuel line do you run? I see they offer 5/15" and 3/8".
Normally 3/8 feed and 5/16 return.
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camcojb (02-05-2026)
  #10  
Old 02-05-2026, 04:16 PM
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Quote:
Originally Posted by dhutton View Post
Normally 3/8 feed and 5/16 return.
Ok thanks.
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