L78 Carb fuel lines?

Keith Tedford · #1 10-31-2007, 02:50 AM

When we bought our L78 car it had a cobbled up fuel pump to Carb setup. I bought the stock reproduction replacement lines. I had to tweak the two 90 degree pieces to get the centre to centre distances right. Other than that, they went together fine. The flare nuts have a straight thread and sealing is done by the inside taper on the double flared ends. The threads aren't meant to seal the fuel in, just to tighten the flare against the taper in the "Y" block or carb inlets. The stainless is single flared. Doubt you could double flare it anyway. When getting flared, the end of the tube has to be square or the flare will certainly be skewed off to one side enough that it isn't going to seal. Some cheap flare tools are just plain useless on steel and wouldn't even begin to do stainless. I've screwed up enough brake line flares to have some idea of what I'm talking about. It does take a little care and practice.

**WILMASBOYL78** · #2 10-31-2007, 03:32 AM

The stock OEM style "soft steel" lines are the way to go..the stainless is a sweet pain in the you know what!! I sometimes put double gaskets on the carb inlet nuts...seems to give it more crush for sealing...

wilma

RamAirDave · #3 10-31-2007, 05:03 AM

[ QUOTE ]
I had to tweak the two 90 degree pieces to get the centre to centre distances right.

[/ QUOTE ]

Another thing to take into account is that the 2 90* lines aren't symmetrical. If not in the right configuration, they'll be way off.

DarrenX33 · #4 10-31-2007, 05:57 AM

FWIW. I picked up a full set up from D&R. Fit pretty nice.

Unreal · #5 10-31-2007, 09:18 PM

My stainless from Right Stuff never leaked. But getting the fittings on the Y lock started was another matter. I ended up starting them before installing the bracket. Then with everything loose, got the bracket over the stud. Then tightened up everything starting with the carb, I think.

nuch_ss396 · #6 11-03-2007, 06:32 AM

Does anyone have the specifics as to the angle of the flares
on the fuel lines to promote proper sealing with the receiving part?

Steve

m22mike · #7 11-03-2007, 04:09 PM

unless something has changed, automotive 45 degrees , aircraft 37 Degrees.

Mike

nuch_ss396 · #8 11-03-2007, 11:18 PM

Thanks Mike!

Got another question for you. As I mentioned earlier in this thread,
I have been told numerous times that the SS lines need to be re-flared
to make sure they seat properly. I was also told that the SS alloy is
very hard on flaring tools - hence the reason for my question about
the flare angle(s). I have seen some heavy duty flaring tools from Ridgid
and I was contemplating getting one to stand up to the abuse
of re-flaring the SS lines. What do you think?

Steve

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