I'm using an adjustible hobbs switch because I have a supercharger. I want the NO2 to come on around 4psi. I"m running a total of 10 psi @ 5800rpm's.

 

If you have a boost gauge, I would wire a light in place of the solenoids. That way, you can adjust until you find the boost that you want.

 

That's definitely a good idea to wire an indicator light in parallel with the solenoids.

I also always fuse the power wire from the battery to the solenoid relay...this allows you to pull the fuse, but still test the system (of course the light mentioned above won't work either when the fuse is pulled). If you put another light across terminals 85 & 86 you'd see anytime the relay is active though.

 

Osmosis - Just curious, why do you want the nitrous boost referenced instead of RPM? I'm also running a supercharger, but have my nitrous RPM based.

 

I want to run the No2 boost referenced because of one; wheel spin and two, I want to use the No2 as a chemical intercooler. I figure things start heating up around 5psi, plus running the No2 at WOT makes traction next to impossible! Yes, I do have a little red LED fixed into my boost gauge pod so it come on once the hobbs grounds and turns the soleniods on. I used to have water injection, but NO2 is so much better Maybe when I get a ford 9inch, I'll run the full 150 shot. As for now, I sent my soleniod to NX and it should be there by Tuesday. I hope I get a fast turn around so I can put it together next week after finals, when I will have some free time?

 

N2O .

 

Let me know how it works out for you. I also use the nitrous for the cooling effect, but think you'd see even more benefit pre-cooling it BEFORE the supercharger heats the air.

 

As of now, I have it hooked up to a ground only hobbs which goes to ground @ 0.5psi and the car has way too much power off the line. Wheel spin all over the place. I am hoping to get the chip tunned so the N2O will come on @ 3psi.

My noids are @ NX as of yesterday so I am just waiting to get it back in my greedy little hands

 

OK, I just received my rebuilt N2O soleniod. So I hope I will get a chance to hook it up this weekend.

 

How much power are you putting down off the bottle and what kind of tires are you running?

 

I'm only using a 50 shot. I think my RWHP is around 300ish. I run pretty consistant 12.8's with out the N2O. I recenlty purchased some Bridgestone RE750's. I had some Bridgesones on my vett (PSO2's) and they were by far the best tires I have ever owned. I heard that the Bridgeone RE750's were comparable to the SO2's and I figured they would be much better than buying BFG's again. I've never had much luck with BFG's. Some guys do, I don't. I ran BFG's on my vett and I thought they were OK, Until I ran the PSO2's. My SO2's in the rain alomst out preformed my BFG's in the dry! Then, my Z came with BFG's. They worked OK. But once the tread got to 1/2 life, traction was near to impossible. I do like the RE750's much more than I ever did the BFGs, they are new as of now and really sticky!

 

Hmmm, interesting...I'm running much more than that and can hook up far better. I was running BFG's previously, but now I'm running 315/35-17 Nitto Drags full time though. I was just curious because I was still trying to figure out the need for the boost referenced nitrous. Keep us posted how it works out.

 

I was going to use the nitto's as my replacement tires for the rear. But I've had such good luck with the Bridgestone's, I went with them. If my memory serves me right, I was pushing 322 rwhp. I should be pushing that without the supercharger, but I am convinced I have a gremlin! Long story behind that one. As far as teh RE750's, the are pretty good but not 1/2 as good as the SO2's. I was going to hook up the N2o this weekend, but I"m sick! figures! I got a hobbs switch from Napa that is adjustible from 0-10psi. SI I will expirment and let ya know what works. The reason I didn't go with a rpm pill is because I have a crane hi6s ignition with boost retard. I figured it would be easier to run it off a boost reference. We will see.

 

i like this thread---i am getting ready for my first nitrous install with a window switch as well as my first install with tps switch instead of microswitch--should be ok as long as i just take my time and double check everything

 

OK,

I got her all hooked up and now my soleniods ground when the arming switch is on and OFF? I put a wire from the hobbs terminal to ground with the arming switch on and off and my soleniods ground each time??? Now, One thing I did notice was the wiring I used was;
30 to positive 12v source
87 to soleniods
86 to the hobbs
85 to the arming switch.

But the instructions say to put the 86 terminal to the arming switch and 85 to ground. Could this be the problem?