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I am planning on upgrading my fuel system to Radium Rails. Based on the fuel systems and build threads I have seen on the forum it seems that most people go with braided line and AN fittings vice the factory rubber hose and barb fittings. I am a fan of the AN fitting and want to put this on my own car.
My question is what are y'all doing to convert from the metal fuel lines that run under the car to the passenger side of the firewall? I was thinking about using fittings like this https://www.summitracing.com/parts/e...BoCraIQAvD_BwE
This however would require sawing the barbed end off the line to fit it. I am not entirely opposed to this, but just would like to see what you guys are doing. With the nature of the market these days I personally hate sawing or permanently modifying anything on my car.
For my FC, I used an -6AN male to 5/16" hose barb adapters. That way I didn't have to mess with cutting the bead/barb off the end of the OEM metal fuel line.
I would make a new hardline if you dont want to modify anything. Moroso and Russell make hardlines that are inexpensive around 60bucks for 25ft length. Do not use these self flaring fittings. While I did have success using those others werent so lucky.
A "tube/nut" fitting along with a 37 degree flaring tool (rigid makes a great one) is great
THis way you kill 2 birds with one stone. AN Fittings and oversized fuel line without modifying the existing line. You ll benefit this if you decide to upgrade to the radium hanger in the future
I would make a new hardline if you dont want to modify anything. Moroso and Russell make hardlines that are inexpensive around 60bucks for 25ft length. Do not use these self flaring fittings. While I did have success using those others werent so lucky.
A "tube/nut" fitting along with a 37 degree flaring tool (rigid makes a great one) is great
THis way you kill 2 birds with one stone. AN Fittings and oversized fuel line without modifying the existing line. You ll benefit this if you decide to upgrade to the radium hanger in the future
So this is the most ideal set up in terms of "future" proof, but it is not really what I am looking for. My main goal is to avoid the Radium hanger. It is far too expensive and overkill for what I am trying to do.
Exactly what pete posted is your only solution here to have AN but not modify the car. You'll run a short section of hose to connect the hard line to the adapter thing and then run your AN lines off of that.
When I revamped my fuel system some years back I used the compression fittings to -6 AN on both the fill and return. You have to cut the nipple flare off which really isn’t that bad with a small pipe cutter. I just kept the shop vac on it while I cleaned up the slight edge left on the inside after. Its a bit more work but it’s one less connection to go bad than the barb to hose to hardline, tho I’m sure that will work fine as well. Check out post #22 in this thread. https://www.rx7club.com/3rd-generati...uting-1021474/
Until such time as you feel you need to upsize the feed line from the factory 5/16", these fittings work great, though you will need to cut the barb off the end of the hard line to get the little brass piece on, so there's no going back. FYI.
The compression fitting you posted will work. Just know that once you cut the flare end off the old line, there is no turning back. I should have a radium hanger/surge tank available for cheap if you're interested.
04-17-22, 04:04 PM
