[Vortech 4.3]

i have almost no AN fitting experience. assembled a few, thats it.

i am plumbing my new fuel injection setup. aluminum fuel rails, .500" ports.

what size fittings/line should i use, for the supply side, and the return side ?
i'm thinkin -8 for supply, and -6 for return ? i have an aeromotive regulator, that has 2 fittings on it, adaptor/AN on each side. i don't even know how to tell what size they are , but i think they are -8. they are the size i want for the supply .

i know this stuff is easy. but i have not delt with it enough to make it easy, yet.

thanx

[41willys]

If you engine is not too radical. I would go with 6AN for supply and return.

Is this a small block?

Usually, I say usually, the ports on regulators are 3/8" npt, with is a 6AN. 8 AN works with 1/2" lines...

Jason

[Deuce]

The number in the front of a AN fitting ( like 3AN ) is 1/16 th of a inch so.......a 3AN is a 3/16th inch line, a 6AN is 6/16th or reduced fractionally a 3/8ths inch line and a 8AN is 8/16th ( 1/2 ) inch line.

This should give you a better idea of what size you need....

Deuce...

[Vortech 4.3]

Originally Posted by 41willys

If you engine is not too radical. I would go with 6AN for supply and return.

Is this a small block?

Usually, I say usually, the ports on regulators are 3/8" npt, with is a 6AN. 8 AN works with 1/2" lines...

Jason

HP wise its not radical. but 500hp from a 4.3 is kind radical
but for this question, HP is the only factor. i think -6 is what i need.
what HP can -6 handle with domestic fuel injectors ?

thanx guys

[Vortech 4.3]

oh-yeah. i don't want pipe fittings on the rails. are there any issues with the O-ring type fittings ?

[bondo]

oh-yeah. i don't want pipe fittings on the rails. are there any issues with the O-ring type fittings ?

That depend on How the Rail is Drilled,+ Tapped.........

The Threads,+ mating surfaces are Not the Same

[41willys]

Using the NPT fittings into your pump, regulator, dist. blocks, and things like that will not affect your numbers. As long as you can supply the fuel with the correct pressures and volumes.

I do not know of any issues with o'ring fittings, but I have never used them either. I always use braided hose and AN fittings, and of course the NPT fittings in the pump, regulator and dist. block.

The NPT ports in the regulator, pump, and blocks are AN on the otherside. You just need the NPT into the ports.

Jason