Okay Gurus I want to replace my rubber cooling lines with stainless steel braided ones. All I see on Summit are like -6AN.

I believe the stock ones are 5/16 or 3/8. Can I change my fittings on the radiator and tranny to work with the -6AN or is -6AN the same as the stock lines?

The Radiator is a DeWitts direct fit A70A.

Thanks

Steve

 

I don't remember how the -AN sizes correlate to SAE, but you can certainly get adapters. Check with Jegs or Summit.

 

Finally found the answer on Summit. Had to use Google but oh well.

I hope this helps someone else too...




What's a -6 or -8 AN?

OK, so you're ready to order fittings for that new fuel system you just got. Now there's only one thing: What's a -6 or -8 AN fitting?

"AN" (Army Navy) Sizes were established by the aerospace industry. The measurements represent the O.D. (outside diameter) of rigid metal tubes. Basically, dash sizes are the numerators of fractions with a denominator of 16.

EXAMPLE:

-6 is equal to 6/16 in. which is equal to 3/8 in.
-8 is equal to 8/16 in. which is equal to 1/2 in.

In the examples above, a -6 AN fitting would work with a pipe that has a 3/8 in. O.D. A -8 AN fitting would be used with 1/2 in. O.D. pipe.

Here's a simple chart, just in case you don't want to do the math.

-02 AN is equal to 1/8 in.
-03 AN is equal to 3/16 in.
-04 AN is equal to 1/4 in.
-05 AN is equal to 5/16 in.
-06 AN is equal to 3/8 in.
-08 AN is equal to 1/2 in.
-10 AN is equal to 5/8 in.
-12 AN is equal to 3/4 in.
-14 AN is equal to 7/8 in.
-16 AN is equal to 1 in.
-20 AN is equal to 1 1/4 in.
-24 AN is equal to 1 1/2 in.
-32 AN is equal to 2 in.

The most commonly used fittings are adapters. These adapters connect an AN fitting to a pipe thread fitting. Most fuel pumps, regulators, and canister type fuel filters, come with pipe thread inlet/outlet ports. In order to use braided line, the ports need to be changed to a AN type of fitting. This is when a "pipe to AN adapter" is needed.

The most popular sizes used in fuel systems are the -6 and the -8 AN, although some high performance fuel pumps and regulators require a -10 AN

 

Thanks for the lowdown on the AN fittings.
I just bought a new 750 Mighty Demon with a 8 An line kit, only to find out that I needed the 6 An to use with my 3/8 fuel line. Ordered the 6 An today and Have the 8An to sell.

 

the long cooling lines are 5/16 enlarged on the end to accept a 3/8 hose. the hard lines to the radiator are 1/4 with a swaged end to accept a 3/8 hose. since you have the radiator you need, you can check the inverted flare connection at the radiator. sorry can't help with A/N fitting parts list. An option may be to rebend the long 5/16 lines (new brake lines) to make the fit up more clean and reduce the length of the flexible hose somewhat.

 

Extremely helpful. Thanks for sharing!!

It's amazing how simple something is when you know the answer.

 

I knew how to convert, but had no clue that AN meant Army Navy. That's an odd but easy way of naming it. Like MOPAR for MOtor PARts.

 

The ports on the radiator are 1/2-20 inverted flare.

These look like they will do the trick

http://www.jegs.com/webapp/wcs/store...10002_22705_-1

 

Tom, do you have a suggestion for the best place to buy S/S braided lines cheap? I'm just getting into learning how to make them myself, and I just need a few good locations for cheap line and fittings.

 

I don't...but you could sign up with PRI and you'll get the monthy magazine. There is a bunch of places selling the fittings and hose.

http://www.performanceracing.com/

 

Thanks, I'll look into it.

 

Just for safety sake check that Demon's screws, gaskets, sight bowls, and especially for aluminum shavings in the bowls and metering blocks BEFORE you install it. I went through two brand new ones and ended up sending them back, found shavings in both.....

 

I've heard that about with Holley carbs in general. Seems to be some problem lately with that.