please check me on my wiring

10sec.et · Posted: Sat Aug 30, 2008 11:28 pm Post subject: please check me on my wiring

i finished the plumbing so i sat down today and figured out how i want to wire the nitrous system. i just need another set of eyes to make sure i didnt overlook anything or wire stuff up wrong. thanks.

clay · Posted: Sun Aug 31, 2008 2:01 pm Post subject:

Looks good to me, I didn't see anything obvious. One thing that has made thing easier for me is finding out that the retard chips and the rpm chips are easily interchangable. They're just resistors and you can use a rpm chip for a retard. A 6000 is very close to 6*, 8000 - 8*, etc. Saves me from having to buy chips for the retard. Are you going to run a purge solenoid? For years I didn't and just put a push button that I could bring the rpm's up and "blip" the nitrous after the burnout. It made things "sneakier" as they never really knew when I was spraying or not. Clay

af2 · Posted: Sun Aug 31, 2008 3:51 pm Post subject: Re: please check me on my wiring

10sec.et · Posted: Sun Aug 31, 2008 8:41 pm Post subject:

thanks. i have a purge but i didnt put it in the diagram because it will have its own circuit with just a push button. i dont think i need a relay for that one. is only going to be activated for a brief few seconds. im still considering a hobbs switch though.

10sec.et · Posted: Mon Sep 01, 2008 1:18 am Post subject:

yknot · Newbie Joined: 26 Dec 2008 Posts: 14 744.90 points

You did a great job, you have to have an electrical background. I would like to see some engine and system protection. I always run a fuel pressure safety switch in series with a engine oil pressure safety switch, this way the engine is protected against activation under low oil or fuel pressure. On my more elaborate systems, I also include a N2O bottle pressure switch, to eliminate the activation under extreme high bottle pressure, which would allow the engine to run lean.

Every Electric Fuel pump vehicle should also employ a safety switch, one that would shut down the fuel pump in the advent of an accident. I run a another oil pressure switch that has three terminals, basically a 30 main terminal and then the 87 and 87(a) terminal, so you have a NC and NO side.
The fuel pump is feed from the "30" terminal and the starter sileniod is connected to the NO, and the ignition switch in connected to the NC. Now under start condition the fuel pump is temporarily energized by the starter solenoid, and as soon as the engine starts, the contacts switch places, and the fuel pump now gets feed from the ignition switch. Now the fuel pump will die when the ignition switch is turned off, or the engine dies. I link this with a Impact switch, which is in series, so under a hard impact, the switch springs open and kills the pump as well.

Good luck with your project and always be safe.

10sec.et · Posted: Tue Dec 30, 2008 12:48 am Post subject:

clay · Posted: Tue Dec 30, 2008 8:28 pm Post subject:

Big Dave · Posted: Tue Dec 30, 2008 11:44 pm Post subject:

Everything looks good and will work as you show it. I am curious why you chose to ground the relays instead of using the relays as a power source (it works either way as it is a serial circuit) it is just the kind of thing I would expect to see on a British car is all.

You didn't grow up debugging problems with Lucas electrical systems on MG's and Triumphs (or Jags for that mater) did you?

Big Dave

10sec.et · Posted: Tue Dec 30, 2008 11:58 pm Post subject: