C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Fuel Line sizes

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Old Mar 27, 2014 | 08:38 AM
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From: DRAYTON VALLEY ALBERTA
Default Fuel Line sizes

I know what the thread sizes are at the top of the fuel line by the engine. But I'm getting back on the project after 2 years and cant remember why I no longer have that connection. So I want to have braided line from down beside the engine up to my fuel rail. I just need to know what size of line it is so I can get a crimp/compression to AN. I know its metric and there are two different sizes. I know 2 years ago I found those fittings too, I just didn't get them I am away from my car and cannot simply measure either. I know I have found the answer but I cant find it and I'm running out of time.
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Old Mar 27, 2014 | 09:23 AM
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Originally Posted by 87stocker
I know what the thread sizes are at the top of the fuel line by the engine. But I'm getting back on the project after 2 years and cant remember why I no longer have that connection. So I want to have braided line from down beside the engine up to my fuel rail. I just need to know what size of line it is so I can get a crimp/compression to AN. I know its metric and there are two different sizes. I know 2 years ago I found those fittings too, I just didn't get them I am away from my car and cannot simply measure either. I know I have found the answer but I cant find it and I'm running out of time.
The tubing is NOT metric but I can't imagine using compression on 27+ year old fuel lines.
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Old Mar 27, 2014 | 10:13 AM
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Use -6 AN fittings and any -6 braided line (which is also, 3/8").
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Old Mar 27, 2014 | 06:18 PM
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Originally Posted by WVZR-1
The tubing is NOT metric but I can't imagine using compression on 27+ year old fuel lines.


If you are going to replace the hoses you run new lines from the filter to the rail , there is a union on the return line by the filter also
The filter / union use the same fittings as the rails
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Old Mar 27, 2014 | 11:25 PM
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From: DRAYTON VALLEY ALBERTA
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Originally Posted by vetteoz


If you are going to replace the hoses you run new lines from the filter to the rail , there is a union on the return line by the filter also
The filter / union use the same fittings as the rails
Fair enough. So just for reference sake what size is the fuel lines. I have one smaller than the other.

And would this be my better option from the filter up:
http://www.jegs.com/i/DFI/310/74730/10002/-1
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