This is a very simple way to set up your nitrous to activate with your VTEC. It's safer than a pushbutton or throttle-body (WOT) switch, and it's a lot simpler to operate. Once you have this set up all you do is open your bottle and flip the switch. As soon as VTEC activates, it'll send power to the nitrous and fuel solenoids, and then as soon as you let off the throttle (and VTEC disengages) the nitrous will disengage. I would generally arm the system after my burnout and before I staged, so that as soon as I launched nitrous would kick in. Since VTEC won't engage when you aren't rolling, I could still launch off my rev limiter and not worry about spraying nitrous while I was sitting on the line.
What you're going to do is go to somewhere like AutoZone or Oreilly and purchase a 4 or 5 pin relay - can be either one. I believe they have them listed as a 'horn relay). They're like 5 bucks. If you get a 5 pin relay, you will NOT be using pin 87a (the pin in the very middle of the relay). Wire the relay up as follows:
85: to chassis ground
86: to VTEC wire, with a switch inline (this will be your arming switch)
87: to the positive wires on your nitrous and fuel solenoids
30: to a 12 volt + source (such as your positive battery terminal)
What you're going to do is go to somewhere like AutoZone or Oreilly and purchase a 4 or 5 pin relay - can be either one. I believe they have them listed as a 'horn relay). They're like 5 bucks. If you get a 5 pin relay, you will NOT be using pin 87a (the pin in the very middle of the relay). Wire the relay up as follows:
85: to chassis ground
86: to VTEC wire, with a switch inline (this will be your arming switch)
87: to the positive wires on your nitrous and fuel solenoids
30: to a 12 volt + source (such as your positive battery terminal)
