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I think the flow would be difference. A long time ago I had a fuel filter(clear type) with 1\4 fitting. I put my first cam in. It was great,, but a friend to me to go get a regular ole 3\8 fitted El'cheap'O filter. And it did make a differance. Especially at higher RPM.
Not exactly what you are asking,,, but trying to help :) .
 

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The 1/4" opening is what will restrict the flow, but as mentioned, it depends what you are going to do with it. What I do is never have any part smaller than the size you feel you should have....in this case, if you're going to run -6 fittings and line (3/8"), then make sure nothing in the path is less than 3/8".
 

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Discussion Starter · #5 ·
Thanx for the info.

In my quest for a new fuel pump I was looking into the Carter 120 gph set at 7-8.5 PSI as it uses the current fuel fittings I have now.

Guess I'll need to find someone that makes a barbed 3/8 NPT fitting....
 

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Thanx for the info.

In my quest for a new fuel pump I was looking into the Carter 120 gph set at 7-8.5 PSI as it uses the current fuel fittings I have now.

Guess I'll need to find someone that makes a barbed 3/8 NPT fitting....
I have some...
 

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Hhhmmm how much? :)

Doesn't look like Summit sells any....sure see alot of AN to hose barbs.....
See the other post on Fuel line size.............I included pics of how a 172 pump looks with 3/8 line. I used braided line, which I highly recommend if you don't care too much about the look compared to a rubber line.
 
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