AN fitting vs fuel line size? Options

[stugray]

I want to buy a fuel cell.

It says that it has:

10AN Male inlet
8AN Male rollover
8AN Male return

http://www.jegs.com/i/JEGS/555/15551/10002/-1

When I try to lookup AN fittings vs. fuel line size I find:

-3AN - 3/8" ID
-4AN - 7/16" ID
-6AN - 9/16" ID
-8AN - 3/4" ID
-10AN - 7/8" ID

So .... are they saying I need fuel lines that are 3/4" ID?????

That is ridiculous. I have a coil of braided stainless hose that is ~5/16 ID.
It seems like the logical size for fuel line, so that seems like -3AN to me.

Why would the fuel lines be so large from the fuel cell?

Seems like a lot of expensive adapters for two tiny lines through my tunnel.

(IMG:style_emoticons/default/WTF.gif)

Any help would be good.
I must be missing something ......


And I suppose the "10AN Inlet" is for the feed to the fuel pump/pressure-regulator and the "8AN return" is the dump line back from the pressure reg.?


Stu

[stugray]

ArtechnikA,

Thanks for the reply.

The 3/8" fuel lines that I have are not stainless so hardening should not be a problem.

Also, after I posted the above, I found this article:

http://www.lbfun.com/warehouse/tech_info/f...Fuel%20Line.pdf

Which states "Automotive flares and flare tools are 45-degree flares. “AN” flares are 37 degrees. It is not “technically correct” to use a 45-degree flared tube with the 37 degree AN fittings, and for military and aviation use, this is not allowed: The 37-degree flares are designed to operate safely in systems up through 3,000 psi, so a flared angle mismatch is not
allowed under these conditions. We never see such pressures in auto fuel systems. In actual testing that I have done, I have found that the 45/37 combination works safely and reliably in pressure systems up to 250 psi."

So, I think I have my answer.

I can get good enough with a 37 degree flaring tool, or purchase a new 45 degree flaring tool.

Stu