I am finalizing the install of my NX kit and have a few questions:

What wires from the NX harness to I connect to the MSD switch to activate at a certain RPM?

I am using a fuel presure gauge and have a FPSS on order. I have two tees I will be placing between the fuel filter and additional fuel line.

How do I tap the FP sender, NX fuel line and FPSS?

I do not have the FPSS but I am trying to get an idea prior to installation of the fuel tee.

NX instructions say you shoudl install a nitrous filter before the in port of the nitrous solenoid but the kit does not come with one. Is it necessary?


Last, where do most of you have your purge line at to view what is coming out when purging?

Dave

 

Sorry I don't know anything about MSD.

You need 1 tee for each device you are connecting. All the ones I have are 1/8 NPT. Get a barbed fitting for each end for the fuel line and screw the FPSS/pressure sender etc in other opening.

Do not install the FPSS between the fuel pressure regulator and the fuel solenoid. The normal momentary drop in fuel pressure when the nitrous system is activated will activate the switch resulting in erratic nitrous system performance. (From NX)

One good thing about wet is that its easy to set the FPSS because it runs at stock pressure and you can just adjust it while the engine is running and check with a meter to see when it opens and closes.

There is a nitrous strainer and thats all I use.

My purge nozzle is in the center of the rain tray between the wiper blades.

Have fun Dave

 

Jime,
Thanks. I currently have two tees connected with a 1/8" fitting for each. Will these be enough for the NX fuel line, the FPSS and FP gauge?

I was planning on running everything between the fuel filter and the FPR. I will run a line from the top of the filter to the tees and then run the line to the FPR. Everything will be place in line between the fuel filter and regulator.

Will having two spots to plug in a 1/8" fitting be enough for all of the above.

Dave

 

You need 1 Tee for each device, if you are installing 3 then you need 3 tees.

 

What are you running with your set up? How are they tapped. Sorry for the redundancy.

Are your running a FR gauge, FPSS, how did you tap for the NX fuel line?

Dave

 

Dave the NX fuel line is a 1/8" NPT same as the FPSS and Gauge. The adaptor from the braided fuel line to the 1/8" NPT is included in the kit. (Its chrome)

 

I can't remember the colors off the top of my head right now, but the MSD window switch is just used as a ground, so just hook up the ground from your on/off switch to the MSD, and it won't allow it to ground/arm until you are at the correct RPM.

 

Thanks Wizza....

 

Thos eof you running a FP gauge and FPPSS, how do you have your set up.

Any pics?

Dave

 

Does anyone know how long it takes to warm up a bottle to proper operating temps? Also does anyone know at what outside temp. it gets dangerous to have nitrous in the car because the bottle will build up too much pressure?

 

Threadjacker

 

 

UPDATE:

I spoke to NX and MSD. It appears the best way to utilize the RPM switch is t0 run the ground from the NX relay, black wire and connect it to the Activation wire on the MSD box, the yellow wire.

The tech support guy described it as grounding the NX relay low side, 85086 to the yellow activation wire on the RPM switch. This way the entire system does not activate until the desired RPM is reached and the RPM switch complets the circuit at say 3200 RPM and turns off the circuit at say 6400 RPM thus eliminatin the danger of hitting the rev limiter and still be spraying( big NO NO).

I also went to the NX site to download instructions and they are more detailed than what is received in the kit. I was able to print a color copy which simplifies things even further.

My bottle is mounted, remote bottle opener is installed, nitrous lines are run all I need to do is wire everything up and install my tees for FPG, FPSS and fuel line feed to the solenoid and I am in good shape.

D

 

You sent the MSD switch to MSD, correct?

Looks like you're about ready to let it loose. Have fun!

 

I did have it modified. The funny thing is that we can modify it ourselves by cutting a simple wire.

I bought the switch from an .org memeber already modified with the pills. MSD just puts a "Stamp of Approval" and a warranty number on it when they do it.

And I am ready to let it loose

D

 

Ooooo... do you know which wire to cut? I'm assuming it's neither one of the loops. Maybe a wire inside the switch?

 

I wll have to check my instructions at home..... in the MSD instructions it tells you what to do.

I know there was a post at one time on the .org which discussed this but I cannot find ii until we move to the new server.

D

 

Hmmmm.... OK, thanks for the info. The MSD instructions tell you how to make it work on 4/6(?)/8 cylinders, but it doesn't show you how to make it work for a 1 cylinder application.


I'll do some searching.

 

Kev:

I very well could be wrong. I know there was a post on here with the instructions on how to modify it and it involved cutting a single wire......

Guess I should be sure before I offer info.....
D

 

When I find that thread, I'll post it here.

 

Does NX use a WOT switch? If it does it sounds like you're wiring it like most of us with the NOS kit do.
http://photos.imageevent.com/xhypex/...ow_switch2.jpg
-hype

 

Hype - nice diagram

You are running the yellow wire on the MSD switch to the WOT switch?

D

 

I'm running a NOS 5124 and a Harlan Rpm switch, but that's the diagram I made. The Rpm switch provides the ground for the WOT switch, so the relay is only activated if both are in the right state.
-hype

 

was just wondering have you found the thread?