Fuel Lines
Author
Discussion

P1nto

Original Poster:

4 posts

241 months

Wednesday 8th March 2006
quotequote all
I am aware of fuel starvation due to centrifugal forces etc and was planning on fitting a swirl pot to my Dax Rush. It's fuel injection so I need a lifter pump filling the pot that feeds the high pressure pump - good so far. I would like to use JIC/AN aeroquip fittings on the high pressure side of the fuel lines. Again this seems ok until I get to connecting braided flexible hoses to the solid copper fuel pipes that run the length of the car using the JIC standard. I think I need to slide nuts onto the pipe then flare the ends of the pipes using a 37.5 degree angle as opposed to the more common brake pipe flares of 45 degrees and then proceed to screw on the fittings. The problem is that a) I can't find any info relating to this to be sure I'm right and b) don't seem to be able to find a 37.5 degree flaring tool.

I suppose the simple solution would be to run flexible braided hose the full length of the car (supported securely of course) but I'm not sure how legal this is. Race or Road. Can anyone shed any light on this?

lukeb

89 posts

302 months

Thursday 9th March 2006
quotequote all
Snap, I'm going through a similar process. I will be doing the flare & nut method you describe. I don't think the precise angle of the flare matters for soft copper, once the fitting is tightened I'm positive it will conform to the 37° male JIC fitting. On a smaller scale, you do exactly this with -3 fittings for brake hoses, and they work just fine. One other alternative I considered was to have a steel JIC weld boss brazed onto the copper pipe. Only practical if you feel like removing the fuel pipe to take somewhere (or can do it yourself).