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02-12-2020, 01:58 PM | #1 |
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Join Date: Jun 2010
Location: NJ
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5/16" id or 3/8" id fuel hose?
Getting ready to add a fuel pressure regulator to my stock 8ba motor and a 94 EAB carb and will replace all rubber fuel hoses. I have 3/8" from other projects but I'm sure this combination would be fine with 5/16" but since it's going to be apart I figured I would ask the experts here.
Does it matter either way? THANKS GUYS! |
02-12-2020, 02:15 PM | #2 |
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Join Date: May 2010
Location: Solihull, England.
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Re: 5/16" id or 3/8" id fuel hose?
Call me old fashioned but 1/4" would be enough.
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02-12-2020, 02:39 PM | #3 |
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Location: Jacksonville FL
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Re: 5/16" id or 3/8" id fuel hose?
From my days as a sprinkler tech at a local country club golf course the further the distance and bigger diameter the more pressure drop. I would think that 5/16 gives you the lesser "potential" of decrease in pressure BUT at that short of distance it most likely would have little to no effect.
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02-12-2020, 02:57 PM | #4 |
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Re: 5/16" id or 3/8" id fuel hose?
If you can go with 1/4 inch to keep it all the same.
I am assuming rest of your fuel line from the tank is OEM 1/4 inch. Use the hose that is intended for today's gas. https://mossmotors.com/barricadetm-e...-hose-by-gates |
02-12-2020, 03:13 PM | #5 | |
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Re: 5/16" id or 3/8" id fuel hose?
Quote:
Charlie Stephens |
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02-12-2020, 04:18 PM | #6 |
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Re: 5/16" id or 3/8" id fuel hose?
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02-12-2020, 04:41 PM | #7 |
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Re: 5/16" id or 3/8" id fuel hose?
The slower the fuel flows through the larger size helps promote vapor lock. Go with small
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02-12-2020, 08:12 PM | #8 |
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Re: 5/16" id or 3/8" id fuel hose?
Too small diameter can cause restricted fuel flow ( starvation) , some times fuel hose will grow shut, seen it many times on heavy equipment, maybe just the type of material, the only time I use 1/4'' is on small lawn mower engines. Just my opinion.
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02-12-2020, 08:14 PM | #9 |
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Location: Central Ohio
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Re: 5/16" id or 3/8" id fuel hose?
At stock horsepower levels, you can run 1/4, 5/16, 3/8 - whatever you like. Truth be told, the 1/4" line will feed more fuel than you'll ever use.
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02-12-2020, 08:58 PM | #10 |
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Location: NJ
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Re: 5/16" id or 3/8" id fuel hose?
Thank you for all your replies. And thanks for the fuel hose link for the good hose.
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02-13-2020, 07:17 AM | #11 |
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Location: Coral Springs FL
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Re: 5/16" id or 3/8" id fuel hose?
I run 1/4 inch fuel line with a 390 Holley and electric fuel pump on a flat head with a fuel regulator near the engine. No problems.
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02-14-2020, 12:03 PM | #12 |
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Re: 5/16" id or 3/8" id fuel hose?
This is good info to know , I am guilty of overkill, sometimes I forget we are working on flatheads and see more and more of why henry designed them the way he did.
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02-15-2020, 03:50 AM | #13 |
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Re: 5/16" id or 3/8" id fuel hose?
original hard fuel line was about 1/4" correct?
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Regards, Todd 1936 FORD Tudor Slantback "cajunhotrodder" on instagram/youtube Last edited by cajunfirehawk; 02-15-2020 at 06:10 AM. |
02-15-2020, 05:20 AM | #14 |
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Re: 5/16" id or 3/8" id fuel hose?
The original hard line was 1/4". That's OD so the ID was more like 3/16". So 1/4" bore rubber pipe should be easily adequate.
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02-15-2020, 06:11 AM | #15 |
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Re: 5/16" id or 3/8" id fuel hose?
Thats what I figured, thanks Mart!
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Regards, Todd 1936 FORD Tudor Slantback "cajunhotrodder" on instagram/youtube |
02-16-2020, 05:01 AM | #16 |
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Re: 5/16" id or 3/8" id fuel hose?
what size comes out of the tank thats it you cant draw any more but remember there a low pressure engine 2/4 psi
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