hard line to an fittings
 

I 'm getting ready to run my fuel lines and would like to run stainless 1/2 as much as I can to a Teflon braided line to the LS connection as well as the fuel pump and filters. Whats the best way to do this, the LS is FI so 60-70PSI required. Build below, thanks

https://lateral-g.net/forums/showthread.php4?t=44704

Its simple, you will need a 37* flaring tool, tube nut, tube nut sleeve, and an union fitting. for the hose side, you just need to buy the appropriate hose and fitting that you can assemble, or measure how long you need it and have a shop crimp a set of ends on.

This is what I use to go from hard line to AN. Probably not the most elegant solution but they work:

http://www.summitracing.com/search/p...tube%20fitting

Don

thanks I knew about the 37 degree flare I was wondering if there is another solution besides flaring. I would imagine it would not be as secure

I think something like this would also work:

http://www.mcmaster.com/#5182k457/=taj967

I was going to use them since you don't need to flare anything but decided just to use PTFE lined braided hose instead of hard line.

These are rated for 2,100 PSI so they should be pretty secure.

They are secure. That type of fitting is widely used in other applications. I have used them several times without issue.

Don

Aren't those just for aluminum tubing though? It doesn't say anything about stainless tubing in the descriptions, just aluminum tubing. I would think that would make a major difference.

That's what steered me towards the yorlok and swagelok style fittings like I linked above before I ultimately just went with PTFE lined braided hose. I know for a fact the yorlok and swagelok fittings hold tight on stainless as we use them with stainless tubing in high pressure tester applications where I work.

They are designed for aluminum tubing but I have used them on transmission lines (90 psi dead head pressures) and mechanical fuel pump applications with steel line with no issues. Whether it works with the harder stainless line is what is not known. 70 psi fuel pressure you gonna wanna flare the tube.

Any particular reason you are wanting stainless? 1/2" stainless isn't a whole lot of fun to work with.

That is a compression style fitting. I am sure they work fine, but not what I prefer to use.

I have used them on 3/8 stainless and I can tell you from experience that the ferrule is on there to stay. At least they hold a whole lot better than those Russell AN to GM fuel rail adaptors...

As I said not the most elegant solution but flaring 1/2 inch stainless is something that I can't image being all that easy to do depending on the flaring tool you have.

Your fittings were $30 each if I read it correctly. That gives me a little heartburn... :lol:

Don

Yeah, those yorlok/swagelok fittings are expensive but they make some for up to 10,000 psi applications. We use them on a "boom" tester. A tester used to test valves beyond their rating for safety factors. Sometimes up to 10,000 psi, and they don't leak. The one I linked was only for 2100 psi though. "Only" haha. Probably overkill, but really you only probably need two of them.

The horse shoe style Russel to GM fuel connections are fine I think. It's the snap lock ones that are an accident waiting to happen.

http://www.russellperformance.com/mc...injected.shtml

The first ones in the above link (push on) are the junk. The second ones (threaded cap) are OK.

I agree about the flaring in my experience anyway. You have to buy an expensive flaring tool to make things come out right. The cheap tools like the one I have suck. I can't make a flare seal for my life with mine.

P.S. I know what you mean about the heartburn. I junkyard dive or find the cheapest stuff that will work whenever I can. Fuel stuff though, I ponied up the cash for what I needed. I'm pretty sure my plumbing cost more than my tanks inc fuel tank.

Thanks for the input, if I flared it I would take it to a machine shop to do so, hardly worth the $$to get a flare tool to flare two ends.

You're in need of some "FLARE SAVERS" --- copper "gaskets" that go between the male and female and they're softer so mate better.

Yes -- the "proper" 37* flaring tools are expense... I think the tapered roller bearing version I have was like $450... The flare savers are FAR less....LOL

http://www.gen-aircraft-hardware.com...agename=flrsav

How about a -8AN fitting to 1/2"-20 which is on the end of SS fuel line?
Thanks