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To the guys who installed nitrous kits

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Old 09-20-2011, 12:50 PM   #1
03FASTGT
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Default To the guys who installed nitrous kits

On my 2003 GT, Where do I hook into fuel?

and

I can't seem to find any holes in the firewall to run my wiring. I do want a clean install, as I have lots of wires to pass through (Window Switch in Glovebox too). Would you drill a hole under the passenger foot panel to make it tidy? Or any other options?

Thanks
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Old 09-20-2011, 12:52 PM   #2
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Its a Zex Wet Kit, hence needing to tap into fuel
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Old 09-20-2011, 04:56 PM   #3
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tho i dont have a zex kit, to pass anything through i would drill a hole, file it to a soft edge, and install a grommet to prevent any chaffing...

from the video i just watched on american muscle, you can tap into the fuel line (guessing you'd need an adapter) or you can use the schrader valve on the fuel rail.
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next project... (LQ4 swap, megasquirt, ford 8.8, and double wishbone front-end?)
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Old 09-21-2011, 09:12 AM   #4
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I just installed it in my 96 gt, you can tap into the fuel rail schrader valve, the kit should come with an adapter, and on my 96 there was a rubber plug that i was able to go right through that leads in behind my pedals, no drilling required
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Old 09-21-2011, 11:08 AM   #5
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my fuel rail had a schrader valve built in it...

Click the image to open in full size.
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Old 09-21-2011, 03:39 PM   #6
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Thanks guys for the suggestions , I'll look under the dash more tonight for a way through, just wish there was one on the passenger side! Ugh!

As far as the schrader valve goes, I'm not sure the 99-04 4.6's have it. Or I'm a complete dummy and cant find it....
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Old 09-21-2011, 04:10 PM   #7
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99-04 may not have one
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Old 09-21-2011, 04:46 PM   #8
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Quote:
Originally Posted by kugzgt View Post
99-04 may not have one
i have an 03, mines on the pass side fuel rail.

edit: just to point out, it's got a black screw on cap like a tire valve stem... should be near where the idle valve hose cross over the fuel rail, toward the front of the vehicle... assuming that its on the pass side. i've seen some cars that its on the driver side? think that might be older cars?
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2003 Mustang GT, 5-spd, TurboCharged
On3Performance Turbo kit (MasterPower T70, .68 A/R)
QA1 tubular front end, QA1 C/O struts (GARBAGE! AVOID QA1!)
MMR750, MHS stage 1 heads, stage 2 turbo cams, Spec stage 2+
Megasquirt firing LS1 truck coils. Edelbrock Vic Jr & Holley 4778 Carb.
She Breathes!

1989 Camaro RS, 305 TBI, 700r4 - few mods, current DD
next project... (LQ4 swap, megasquirt, ford 8.8, and double wishbone front-end?)

Last edited by zero2005; 09-21-2011 at 04:50 PM.
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Old 09-23-2011, 02:14 PM   #9
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I honestly don't think my fuel rails have one. I just looked again. Thanks for the help though dude, do you have the polished aluminum ones that say ford on them? This is kinda weird..
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Old 09-23-2011, 03:00 PM   #10
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hey, can you grab a picture of both sides rails? do you have aftermarket fuel rails maybe? i would think there's gotta be some kind of schrader valve that you can tap into, or else how are you supposed to relieve the pressure incase you want to swap injectors or what have you?

here what my rails look like:
Click the image to open in full size.

the schrader valve is on the bottom left part of the picture at the very tip of the rail, which would be the passenger side. its possible that it could be on the other rail. im seeing alot of discrepancies between location. i wonder if its just based on where the part was manufactured?

the car hasnt had a motor swap has it?
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2003 Mustang GT, 5-spd, TurboCharged
On3Performance Turbo kit (MasterPower T70, .68 A/R)
QA1 tubular front end, QA1 C/O struts (GARBAGE! AVOID QA1!)
MMR750, MHS stage 1 heads, stage 2 turbo cams, Spec stage 2+
Megasquirt firing LS1 truck coils. Edelbrock Vic Jr & Holley 4778 Carb.
She Breathes!

1989 Camaro RS, 305 TBI, 700r4 - few mods, current DD
next project... (LQ4 swap, megasquirt, ford 8.8, and double wishbone front-end?)
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Old 09-23-2011, 03:42 PM   #11
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Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
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Old 09-23-2011, 03:56 PM   #12
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wow... thats weird... well you can either hack something together i suppose, OR you could buy something like this:
http://www.americanmuscle.com/nx-fue...er-9904gt.html

just for reference here's the link to american muscles install video:
http://www.youtube.com/watch?v=xRhYw...ayer_embedded#


you can skip to the very end to see how they connect it. they show their schrader valve at 9:10. its on the driver side for them it looks like. they also have coil packs which leads me to believe they are installing on an older 98 model. what's really odd is that i have an 03 with a schrader valve, and u do not?

edit: if you skip to ~ 9:45 they show a picture of a fuel fitting for a 96 cobra. its a T-fitting. this might also be a cheaper option instead of the above 60$ adapter...
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2003 Mustang GT, 5-spd, TurboCharged
On3Performance Turbo kit (MasterPower T70, .68 A/R)
QA1 tubular front end, QA1 C/O struts (GARBAGE! AVOID QA1!)
MMR750, MHS stage 1 heads, stage 2 turbo cams, Spec stage 2+
Megasquirt firing LS1 truck coils. Edelbrock Vic Jr & Holley 4778 Carb.
She Breathes!

1989 Camaro RS, 305 TBI, 700r4 - few mods, current DD
next project... (LQ4 swap, megasquirt, ford 8.8, and double wishbone front-end?)

Last edited by zero2005; 09-23-2011 at 04:05 PM.
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Old 09-23-2011, 09:15 PM   #13
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My ZEX kit came with this fuel rail adaptor...
http://www.zex.com/zx/ford-fuel-rail...r-engines.html
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Old 09-23-2011, 09:47 PM   #14
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interesting... OP where did u buy the kit? did u buy it used? AM.com also states that it includes a "fuel T" which im assuming is an optional adapter to splice into the fuel line if you dont have a schrader valve.

the AM.com kit doesnt make any mension of the adapter block though.
trueblue, where did u buy your kit?
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2003 Mustang GT, 5-spd, TurboCharged
On3Performance Turbo kit (MasterPower T70, .68 A/R)
QA1 tubular front end, QA1 C/O struts (GARBAGE! AVOID QA1!)
MMR750, MHS stage 1 heads, stage 2 turbo cams, Spec stage 2+
Megasquirt firing LS1 truck coils. Edelbrock Vic Jr & Holley 4778 Carb.
She Breathes!

1989 Camaro RS, 305 TBI, 700r4 - few mods, current DD
next project... (LQ4 swap, megasquirt, ford 8.8, and double wishbone front-end?)
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Old 09-24-2011, 05:22 PM   #15
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Quote:
Originally Posted by zero2005 View Post
interesting... OP where did u buy the kit? did u buy it used? AM.com also states that it includes a "fuel T" which im assuming is an optional adapter to splice into the fuel line if you dont have a schrader valve.

the AM.com kit doesnt make any mension of the adapter block though.
trueblue, where did u buy your kit?
My kit is the 75-175hp kit (I think p/n 82217). I looked at purchasing it from one of about 4 different places. I think the 75-125hp kit may not have had this adapter. At least I seem to recall not seeing it in the picture of the components included.

ZEX sells this adapter seperately, so anyone could get one if needed. It was an easy and effective method of hooking the supply line to the rail.
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Old 09-25-2011, 08:49 PM   #16
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Yea Zeroo, it came with a "T Fitting" that can splice into the 1/4 inch fuel line running inbetween the fuelrails but its VERY tough to get back there, I have no idea how I'd manage that. Either way I dont think I'm going to install this kit this year the car is going to sleep in 4 weeks anyways. But it'll be nice to know in the spring.

It is the 75-125 kit, I bought it new off ebay, but its the same as American Muscle sells. TrueBlue, at first glance I dont understand how this adapter sets up, I'm looking at the picture can you explain? Is it fuel in on the bottom and fuel out on the top and then you can thread in a feedline to your nitrous box on the side? Does it mount clean somewhere with the 2 bolts provided?
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Old 09-25-2011, 09:45 PM   #17
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Quote:
Originally Posted by 03FASTGT View Post
Yea Zeroo, it came with a "T Fitting" that can splice into the 1/4 inch fuel line running inbetween the fuelrails but its VERY tough to get back there, I have no idea how I'd manage that. Either way I dont think I'm going to install this kit this year the car is going to sleep in 4 weeks anyways. But it'll be nice to know in the spring.

It is the 75-125 kit, I bought it new off ebay, but its the same as American Muscle sells. TrueBlue, at first glance I dont understand how this adapter sets up, I'm looking at the picture can you explain? Is it fuel in on the bottom and fuel out on the top and then you can thread in a feedline to your nitrous box on the side? Does it mount clean somewhere with the 2 bolts provided?
that block is meant to go onto the driver side fuel rail, there's a little black box for the fuel rail pressure sensor. you take that off, install the adapter block, then reinstall the FRPS. this would provide what looks like 2 threaded holes, you can then run one of the adapters off of that NPT threaded hole to the fuel line for the nitrous kit.

you can see in the picture i have posted up its on the right side, there's a nice little place for it (doesnt show the black box)
you can see in your 2nd picture, the black FRPS...
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2003 Mustang GT, 5-spd, TurboCharged
On3Performance Turbo kit (MasterPower T70, .68 A/R)
QA1 tubular front end, QA1 C/O struts (GARBAGE! AVOID QA1!)
MMR750, MHS stage 1 heads, stage 2 turbo cams, Spec stage 2+
Megasquirt firing LS1 truck coils. Edelbrock Vic Jr & Holley 4778 Carb.
She Breathes!

1989 Camaro RS, 305 TBI, 700r4 - few mods, current DD
next project... (LQ4 swap, megasquirt, ford 8.8, and double wishbone front-end?)

Last edited by zero2005; 09-25-2011 at 09:48 PM.
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Old 09-26-2011, 04:04 PM   #18
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^^^^ Exactly right.
It is a simple method of hooking the fuel line to the fuel rail.
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Old 09-27-2011, 08:10 PM   #19
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Oooooo Wicked, I'll buy one, thanks guys!
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Old 09-27-2011, 08:10 PM
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