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01-15-2017, 09:15 PM | #1 |
Registered User
Join Date: Mar 2015
Location: Buellton, CA
Posts: 123
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Fuel line size
i am ready to install the fuel line on my 49 p/u and i ordered the stock fuel shutoff valve for the stock tank, and noticed it's only 1/8" in size but the fuel pump for 4.3 V6 is 3/8". is that going to be to small.
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01-15-2017, 10:42 PM | #2 |
Registered User
Join Date: Nov 2015
Location: Jemez Springs, NM
Posts: 435
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Re: Fuel line size
1/8th sounds pretty small. Have never seen one that size. Sure it's not 1/4 or 5/16th's?
Much more common. My stock 3100 had 5/16ths. Going with 3/8ths since I am running new lines anyway |
01-15-2017, 11:21 PM | #3 |
Registered User
Join Date: Mar 2015
Location: Buellton, CA
Posts: 123
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Re: Fuel line size
LMC part number 32-3448 fuel pet cock, it defenetly is 1/8" NPT at the fuel tank.
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01-16-2017, 12:25 AM | #4 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: Fuel line size
Your first question it sounded as if you were using 1/8" fuel line. 1/8" npt is the pipe thread size not the line size..the line Id for 1/8" npt is roughly 1/4"..I don't know if that'll work with a 4.3 without restricting flow..but it might be fine..are you carbd or injected?
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01-16-2017, 01:58 AM | #5 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,333
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Re: Fuel line size
with a 4.3 carbed engine I would say 3/8 is probably what you want to use for fuel line. the suction side is usually bigger than the return side. can you up size the fitting on the tank and use a bigger pipe thread like 1/4 or 3/8?? it would mean making the hole bigger and retapping? 1/8 pipe fitting is not gonna flow much.
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01-16-2017, 03:49 AM | #6 |
Registered User
Join Date: Mar 2015
Location: Buellton, CA
Posts: 123
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Re: Fuel line size
yes it is carbed.
i can drill out and tap to larger size, that what i am going to do . |
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