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Fuel pressure line for nitrous

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Old May 6, 2007 | 05:44 PM
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From: Sag-Nasty, MI
Fuel pressure line for nitrous

Has anyone tapped into the rubber portion of the factory fuel feed line for a nitrous install, or just bought an aftermarket fuel rail with an extra port?

On my old car, I had just used the 50psi fuel pressure hose along with a brass T, however I'm not sure that setup will work with the Evo's fuel pressure... and I can't find ANY photos of other people's installs...
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Old May 6, 2007 | 07:26 PM
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From: MA
I had upgraded to a Aeromotive FRP to get fuel pressure back down to stock spec, so I used the extra port on that. A 6an O-ring to 4an flare adapater, then the 4an line to my nitrous solenoid. Nice clean solution, IMO.

The idea you propose would work, but I'm not sure it's the best way to go about it. With the DSMs, you would simply convert to an line after the firewall-mounted fuel filter to the rail, and put one of many possible AN style tees or guage ports on that line. The EVO doesn't provide us with this option though. I'll have to take a look at my car to see how the stock line is setup exactly.
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Old May 6, 2007 | 07:46 PM
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From: Sag-Nasty, MI
Thanks for the reply,

The only time I have had any experience with the rubber style line using the metal endcaps like the stock pressure hose on the evo has, was doing a V8 swap into a jeep.. the power steering pressure hose was a setup like that. And when that line was modified it made a mess lol
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Old May 6, 2007 | 10:35 PM
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From: MA
Yeah, PS lines are going to have a little more pressure than a fuel line. I haven't had time to go out and check my car, but I seem to remember it just bein a metal line up to the firewall, then a rubber line clamped on to it. If so, that is where I would tap in. Ys are better than Ts.
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Old May 7, 2007 | 03:59 AM
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From: Sag-Nasty, MI
Yep, metal to the firewall, then rubber with a metal end going into the fuel rail. I might be making a big deal out of it for nothing, I'll probably just give it a try
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Old May 7, 2007 | 06:29 AM
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Took a look at my car. There is a hard fitting between the hard line and the rubber line. I'd be willing to bet you can find an adapter (like the ones for DSMs) to AN, and convert to AN between the hardline and the rail. Then tapping into it for the nitrous fuel feed will be a no brainer. If you don't feel like arsing about with metric to AN adapters, the connection at the tank end of the hardline is just a slip on rubber hose type of joint, you can always run a 1/4" high pressure rubber line up to the engine bay. Not as clean, but it would work.
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Old May 7, 2007 | 11:58 AM
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From: Long Island
Pruven Performance makes the perfect billet adapter for this. Cost's about $65. I use it and it works great. Nice and stealthy.
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Old May 7, 2007 | 02:46 PM
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From: Sag-Nasty, MI
Hey, I tried to check it out on their site, but the link for products won't open... do you have a pic of it?
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Old May 7, 2007 | 07:13 PM
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Just cut the rubber line, put the T in with fuel injection style hose clamps, and forget about it. I did and it works fine for my 75 shot.
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Old May 8, 2007 | 07:26 PM
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somebody help me. Im leaking like crazy. I teed of the rubber part of the line. I bought 5/8 fuel hose with screw clamps and its leaking like really bad!!! someone please help!!
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Old May 8, 2007 | 11:07 PM
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did you cut your line flat not angled and clamp it correctly if your having problems i would just replace the line then. and get the pruven adapter.
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Old May 9, 2007 | 03:05 AM
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From: Sag-Nasty, MI
Originally Posted by pac74
somebody help me. Im leaking like crazy. I teed of the rubber part of the line. I bought 5/8 fuel hose with screw clamps and its leaking like really bad!!! someone please help!!
Dude, seriously
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Old May 9, 2007 | 05:52 AM
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From: crestwood il.
[QUOTE=Liqquid;4310556]Dude, seriously[/QUOte

I dont get it. It really happened to me
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Old May 9, 2007 | 09:38 AM
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From: Sag-Nasty, MI
Are you serious? Ok, I apologize..

First of all, make sure you've used fuel injection line and not regular fuel hose, big differance, the stuff I use is Goodyear fuel injection hose, costs about 5 bucks a foot!

Hopefully, that's the problem... I made that mistake on my first car, and split the hose!!

Last edited by Liqquid; May 9, 2007 at 09:40 AM.
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Old May 9, 2007 | 12:31 PM
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From: crestwood il.
okay so far i went back out and bought the efi hose clamps and I used a tee from zex and so far no leaks!! I armed the nitrous after a few runs without it and all I hear was brrrrrrrrrppp from the exhaust end. preasure on bottle was at about 150. I take it its empty?? imputs please..
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