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Fuel pump assembly thread size

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Old 11-05-2013, 12:39 PM
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Fuel pump assembly thread size

Trying to plumb the fuel to my ls1, using 3/8's nylon fuel line. The piece coming out of rhte fuel tank has a flared fitting that goes inside a female fitting on a rubber line for about 6 inches then to another fitting. What size fitting is this? I need something to go from this to a 3/8 nylon barb. So frustrating!
Old 11-05-2013, 04:05 PM
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Why would you be using "3/8" fuel line on a motor vehicle? When was the last time SAE-dimensioned parts were used on any motor vehicle (including US-built)? 1970?

I'm not sure what an ls1 is, but I'm sure it doesn't use 3/8" fuel line. Why don't you just get regular 10mm steel line (and borrow the bender for free) and save yourself a lot of work.
Old 11-06-2013, 03:36 AM
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Originally Posted by scope103
Why would you be using "3/8" fuel line on a motor vehicle? When was the last time SAE-dimensioned parts were used on any motor vehicle (including US-built)? 1970?

I'm not sure what an ls1 is, but I'm sure it doesn't use 3/8" fuel line. Why don't you just get regular 10mm steel line (and borrow the bender for free) and save yourself a lot of work.
You don't know what an LS1 is??? Do you live under a rock? 3/8 nylon fuel line is incredibly common here... You seem to be talking out of your rear.

I'm asking for the size of the fitting on the fuel pump assembly. Not for your apparent lack of knowledge.

Get out of my thread.

Last edited by MrArmyAnt; 11-06-2013 at 04:06 AM. Reason: Making child friendly.
Old 11-30-2013, 08:45 AM
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Originally Posted by MrArmyAnt
Get out of my thread.
Reminds me of Harrison Ford's "Get off my plane" in Air Force One.
I too will be needed to know the fuel pump thread pitch. I plan on pulling my bed in the next couple of days to install my walbro 255. If you find it before then would you please post it up, If not I will try and figure it out when I get to that point also.
Old 11-30-2013, 01:30 PM
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It's apparently an easy to find size. If you live in Japan. This week I'm going to Midwest Hose, if they can't figure it out, then I'll probably be having to reflare it.
Old 12-06-2013, 11:45 AM
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Or... Pirate came up with 6AN Male to M14x1.5 Female INVERTED FLARE

http://www.pirate4x4.com/forum/toyot...k-fitting.html

Piranha Racewerks Fuel Line Feed Adapter

Fuel Line Fitting Adapter 6AN - M14x1.5 Female INVERTED FLARE

6AN Male to M14x1.5 Female INVERTED FLARE
Old 12-09-2013, 04:08 PM
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I ran into fuel starvation on my last LS swap so I was worried about the stock 5/16 toyota line giving me problems down the road. I ended up going way overboard but am happy how mine ended up in the end.



Old 12-15-2013, 05:55 PM
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Jesus! lol. I'm hoping i just being smaller for about a foot it won't cause too much back pressure till it gets to the full sized line.
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