I'm curious as what the best method of approach would be to connect the stock hard fuel lines to -6 SS braided lines? Not concerned with the ones in the rats nest, but with the feed and return lines on the firewall.

Thanks,

 

I've been working on this. First I tried to have my mechanic use some weld on fittings (I can't weld) because I read that someone else did that, Dahlen I think. However, my mechanic tried to weld them on and said he couldn't even with TIG welding. The stock hardlines are too thin. Sooo, next up is to try and flare the lines and use a tube nut. The problem with that is the hardlines are 5/16", so you end up with a -5 connection on the end. Finding -5 to -6 adapters was the hard part. I found some at Baker Precision (www.bakerprecision.com I think). Anyway, the tube nuts and adapters should be here tomorrow, so I can flare the lines over the weekend and see how it works.

- Andy

- Andy

 

I'm glad I'm not the only one slightly stumped. Please keep me updated on how it works, and I'll let you know if I find any easier ways as well.

 

Bump

 

actually the hard lines are metric.. so using a standard tube nut is not the best way to go.. call up goodridge. www.goodridge.net/usa/index.htm they make both metric tube nuts and metric compression fittings. as another option find a better welder.....seriously if the line is cleaned properly any competent tig welder shouldn't have a problem

 

Don't some of the fuel kits out there include ss lines from the fire wall? You could pm RXRotary2 7

 

Why? That's one of the coldest parts of the engine bay and those lines are the easiest to inspect and replace. On top of that, you're leaving the rats nest lines stock. You'd be better spending your money on a new FPD and a line recall kit.

Not to mention, braided lines aren't bullet proof and abrade anything soft that they are in contact with.

 

yeah i need to do this as well... has anyone successfully had them welded on? id feel safer as i wouldnt be AS worried about leaks

 

5/16" = 7.9375mm. The stock lines are actually 8mm I believe, so I'm not going to worry about .06mm . I just decided to take the lines to a mechanic to have them flared, so I'll see if they're airtight when I get them back, hopefully tomorrow.

- Andy

 

Dhahlen has I believe. One of this threads is where I got the idea to try welding in the first place.

 

Who are you referring to? If it's me, then thanks for the useless post. Not to sound rude, but I'm not trying to replace the lines. I'm in the process of doing some upgrades to the fuel system, which include (but is not limited to) a secondary fuel rail for 1680cc injectors, and a FPR. In any case: the fuel rail and FPR use AN-6 fittings, and came with SS line. I need to connect the FPR to the return line on the firewall.

I don't know any TIG welders, and unfortunately I also don't know everything there is to know on our little space rock. So I'm asking, how can I attach this line safely? If I can't, then do I have to replumb this line in it's entirety? Or is there another solution that I'm missing?

I hope that this turns out to be a viable solution
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I cant tell by your post exactley what your trying to accomplish but i tied directly onto the hard lines below the firewall 6 an ss braid with 1/2 wide clamps. The hard lines have a sweadge that will prevent slipping of if clamped. I also used elect tape to prevent braid from comming lose. I might have what your trying all wrong but i have no leaks and race the car and drive on the streets both. Good luck.

 

http://store.summitracing.com/partde...5&autoview=sku
You just slide them over the line, tighten, and screw on your braided line.

Fit like a glove!

 

Beautiful, exactly what I was looking for. I didn't know if such a thing existed, hence the post. Thank you very much Jarrett.

 

I'm scared to use compression fittings for 2 reasons:

1. I'd worry about the lines moving around and the compression fitting coming loose over time.

2. I'm not 100% sure the compression fitting is spec'd to deal with the pressure of a fuel injection system.

Of course, I don't have any real data to back either of these up, just FUD on my part.

- Andy

 

No problem. I was going to flare my lines then have earl's fittings installed but then i found these. They are just simple compression fittings with a 6an end. The only thing you have to do is cut off the first stock bulge/flare on the end of the lines.

These fittings were recommended to me by a bunch of race dudes....

 

I've used compression fittings before on fuel lines and have never had a problem. I've also used them @ work up to 100psi on 5/16" tubing and I've never seen them leak. I think it'd be pretty safe, as my fuel system shouldn't ever take more than 55-58 psi. I was just unaware that they made such an adapter.

 

Yeah, I'm talking to you, boy genius. I mis-read your post.

So, eat a dick. Not to sound rude or anything...

 

to weld thin walled tubing can be done really easily by fitting a copper bar inside the tube (as close to the same size as the I.D. of the tube you want to weld. since you cant weld copper it will just pull out easily after its done and any holes that would have been burned into the tube are filled to meet the copper

 

 

FWIW... to avoid compression fittings, you could do an AN->NPT adapter, then put on an NPT->fuel hose adapter. Then, use a section of FI hose between the barb and the stock lines on the f-wall.

Rupe Goldberg style.

 

this may be a completely useless post, because I've never done fuel lines on an FD, but when I did ss fuel lines on my FC I just slipped the line over the stock 5/16 barbed fitting and put a hose clamp on there. does the stock FD line not have a 5/16" barb?

 

Ditto on the earls fitting. Fits perfectly on the stock hard lines.

My 2 cents.
Crispy

 

The end of the line does have a flare, but it is not barbed. Personally I don't feel comfortable using the SS line on the hardlines, and I abhor hose clamps period (other than T-bolt). As someone mentioned above, they run it with no problem. I guess it comes down to what you feel comfortable doing.

Also, the earls fittings seem to be a much 'cleaner' way to do things, and easier when it comes to attaching/detaching the lines.

 

If i had knowen about the earls compresson fittings i would have used them but were i connected is out of site and i used the braid over hard line but i went to extra pains to do and use extra care to do a good job. I wish i had known about the earls!