Fuel and Ignition Fuel Pumps and Systems, Ignition and Spark Systems

Intake Modifications for Fuel Rails

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Old Aug 16, 2007 | 11:30 PM
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Bowtie_Z28's Avatar
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Intake Modifications for Fuel Rails

Alright, I am working on my -an fuel rail build but have a slight snag.

I am planning on running a -6 an return from the front of both fuel rails, running in parallel, these returns will then go to the regulator. However, instead of filling where the crossover tube was and drilling the ends I want to use the holes already built into the rails for the crossover tube. I am planning on having a -an fitting welded on but I am unsure about how well a 90* fitting is going to fit on there in the crossover tube gap on the intake.

I know it will probably not fit perfectly and anticipate probably needing to do a little bit of grinding on the intake to clear the way some for it to fit. The only concern I have is material....how much material will I have to play with? Also if anyone has done this before some pics would be great of where you had to grind (if you had to) and which fittings you used.
Old Aug 18, 2007 | 09:59 AM
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Nobody?
Old Aug 18, 2007 | 12:15 PM
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it not going to fir that way.....thats why nobody has done it..

Weld up the stock crossover holes.....easiest to put the new stuff on the top

aba383 had some good pics of his around here.........they shouldn't be hard to find
Old Aug 18, 2007 | 01:11 PM
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I know the 90* fittings are going to fit there thus the reason I need to know simply because there isn't enough room. That really isn't all that big of a deal as longas there is enough material in the crossover tube area that I can remove with a dremel to get the 90* fittings to fit.
Old Aug 19, 2007 | 08:03 PM
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I put two 90's in my cross-over holes. Worked perfectly, no grinding on the intake was necessary. I used a 1/8th NPT tap to tap the holes then screwed the fittings in so they wouldn't move while welding them. I used Russel 1/8th NPT to -6an 90* fittings. Only a couple threads will catch so thats why they also needed to be welded. No leaks at all. Rob.
Old Aug 21, 2007 | 10:21 AM
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I am sorta wishing had gone your route rob. What I did instead is I bought 2 weld in -6 an bungs and am having those welded on. From there I will screw on a 90* -6an coupler to hook my lines up to. Still waiting on the welder to get finished with everything (he has had the stuff for ever a week now and no progress ).

I will be sure to post pictures up as progress is made.
Old Aug 21, 2007 | 05:14 PM
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I have a 93 so I dont have a cross over pipe but heres how I did mine, I put -8 fittings on the front and back, -8 is eaiser to do since my regulator has 2 -10 inlets and one -6 out, they dont make a -10 to -6 reducer that I know of so I have a -10 to -8 reducer on the side of the regulator to match up to my lines.
Old Aug 21, 2007 | 10:50 PM
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My setup is actually going to be failry similar to yours. two -8an feeds at the back of the rails with two -6an returns into the regulator as you have dropping down into the one -6an return to the tank. The only part I haven't really decided on is if I am going to run a -10an feed from the tank or just use an -8an....
Old Aug 22, 2007 | 03:33 AM
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like I said tho if your going to use an aeromotive regulator the 2 inlets are -10 and you can only get a reducer to -8 thats why I ran -8.
Old Aug 22, 2007 | 08:34 AM
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This was true but Aeromotive released a different regulator that allows for -6an at all lines now instead of the two -10 lines and the one -6 line.

13101 is the regulator you have it has the two -10 lines that feed into the one -6 return line

13109 is the same regulator specificiation wise except it has two -6 lines that feed into one -6 line (this is the one I am using)
Old Aug 23, 2007 | 03:22 PM
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For those that care I picked up the rails from the welder today and they turned out pretty good. I was able to get everything to fit without any issues/grinding on the intake.

I wonder why nobody has done it this way before??? Anyways I will post up some pictures for everyone to see this evening once I get off work.

Last edited by Bowtie_Z28; Aug 23, 2007 at 10:06 PM.
Old Aug 23, 2007 | 09:40 PM
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Here they are, I only have the two return line fittings on there to ensure that the threads didn't have any slag on them. I still have to get a few other hose ends, my regulator, and obviously the hose before these can get installed but here they are so far. More pictures to come as things get further along. Also if anyone wants a more specific picture or details let me know and I will let you know.















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