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Old 09-24-2019, 06:25 PM   #1
Deadon
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Default Fuel lines ?

What brand PTFE lines and fittings ? Street / strip car likely see more street miles now I'm retired. Thinking -8 pump to carb and -6 return line . My pump is 160 gph at 12 psi. Will be swapping out my -8 AN fittings and stinky fume breathing braided line .
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Old 09-24-2019, 06:31 PM   #2
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Default Re: Fuel lines ?

Send a PM to OB1 and ask him. Return hose should be same or larger than supply hose.
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Old 09-24-2019, 06:55 PM   #3
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Default Re: Fuel lines ?

I need enlightening getting old and really haven't kept up .
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Old 09-24-2019, 07:30 PM   #4
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Default Re: Fuel lines ?

Quote:
Originally Posted by rodent4 View Post
Send a PM to OB1 and ask him. Return hose should be same or larger than supply hose.
even though this is a little counter intuitive, this is true
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Old 09-24-2019, 07:35 PM   #5
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Default Re: Fuel lines ?

He means call ......... https://ormebrothers.com/
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Old 09-24-2019, 09:13 PM   #6
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Default Re: Fuel lines ?

The return line is an excellent way to go. Make sure the tank end lets the returned fuel back into the tank near the bottom, so it is submerged.
I run -8 out and back. The hole in my bypass regulator is about .180. It's easy to convert a standard $20 Holley regulator to a bypass for a carb.
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Old 09-25-2019, 01:50 AM   #7
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Default Re: Fuel lines ?

this return line sizing has me wondering why my Weldon reg has -10 inlet/outlet pressure ports and then a -8 return port. Are you guys repeating, repeating, repeating hearsay or is the larger return line sizing written in stone somewhere...?
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Old 09-25-2019, 07:50 AM   #8
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Default Re: Fuel lines ?

Quote:
Originally Posted by Shoedoos View Post
this return line sizing has me wondering why my Weldon reg has -10 inlet/outlet pressure ports and then a -8 return port. Are you guys repeating, repeating, repeating hearsay or is the larger return line sizing written in stone somewhere...?
On carb setups, its common for the return to be as large or even larger than the supply.

But it really depends on the pump. The more volume it has, the more return it will require to control under idle/light load.

Also, pay attention to the hose and fittings used. They aren't all created equal. I've seen hose ends of the same size with visibility smaller ID's than others. And flared tubing is typically even larger than it's equivalent hose.
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Old 09-25-2019, 01:09 PM   #9
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Default Re: Fuel lines ?

I'm all fragola here. No issues 5 years after the build. As said, make sure the return cannot aerate the fuel around the pump while returning to the tank
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Old 09-25-2019, 04:10 PM   #10
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Default Re: Fuel lines ?

Quote:
Originally Posted by Shoedoos View Post
this return line sizing has me wondering why my Weldon reg has -10 inlet/outlet pressure ports and then a -8 return port. Are you guys repeating, repeating, repeating hearsay or is the larger return line sizing written in stone somewhere...?
Carbs run on low pressure .

Some pumps flow so much fuel that the return can become a restriction and make it hard to get the regulator pressure down low enough not to push past the N&S.

Usually see it on blow-thru carbs because of the big pumps being used .

Bottom line is ,it cant hurt to run a large return . Not necessarily larger than the feed , but at least the same size .

Ive always had -10 feed and return . Even with EFI now

Larger return also stops aeration at the fuel cell if returning it to the top of the cell without a dip tube .

Last edited by boostedbowtie; 09-25-2019 at 04:15 PM.
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Old 09-29-2019, 03:25 PM   #11
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Default Re: Fuel lines ?

Fragola PTFE 6000 Hose & Real street reusable hose ends coming Monday from Summit . They gave me 10% off plus free shipping
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Old 09-30-2019, 02:50 AM   #12
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Default Re: Fuel lines ?

Joel used to give a YB discount too
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Old 09-30-2019, 03:37 AM   #13
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Default Re: Fuel lines ?

Quote:
Originally Posted by Deadon View Post
Fragola PTFE 6000 Hose & Real street reusable hose ends coming Monday from Summit . They gave me 10% off plus free shipping
Fuck Summit, I try to buy as little off them cunts as possible now, Jegs also. If I was buying from the States I'd rather buy from Orme, even if it cost more.
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Old 09-30-2019, 04:15 AM   #14
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Default Re: Fuel lines ?

Orme, my go to guys....
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Old 09-30-2019, 04:50 AM   #15
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Default Re: Fuel lines ?

Quote:
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He means call ......... https://ormebrothers.com/
You get a 10% discount with them also.
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