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Zex nitrous wiring

Posted: Tue Mar 21, 2006 8:00 am
by j90crx
Dose ANYONE have an exact diagram or instructions on how to wire zex unit to hondata( I'm Not the best at wiring but i can follow a scamatic), I talked to zex tec and he was unsure, Do you still use white TPS wire from Box?? Someone out there must have wired this sucessfully, PLEASE help me. How do you wire zex without using all their fueling stuFF

Thank For any help

Posted: Tue Mar 21, 2006 10:23 am
by Spunkster
You will need to connect it as a dry kit...since zex uses a box of tricks, it is impossible to say what does or does not need to be hooked up. They should be able to tell you what wires operate the nitrous solenoid only. After you figure that part out, use the wiring diagram located at

Alternatively, you could just forget about using thier box and buy a regular nitrous solenoid.

Posted: Tue Mar 21, 2006 5:26 pm
by j90crx
Ok I called zex and talked to one of the guys who designed the system, you follow the hondata scimatic very closely only you take 87 from relay and run it two either white TPS switch, or to red power wire from box, Then you must take out the regulator and manifold fittings from the side of the zex box and plug them with 1/8 inch plugs.

Posted: Wed Mar 22, 2006 10:37 am
by Dariusz
I use a Zex Dry Kit and a S200 in a B18C1. I trie to explain in my bad english. I make this to work:

- The arm switch go direct to the ECU (Ground to activated the N2O options in the Hondata)
- The ECU (Hondata) output (a ground sygnal) go to a relay.
- The out of the relay (a 12V sygnal) go to a Y where 1 part go direct to the + input of the Zex box, and the other go to a voltage converter. This voltage converter convert from 12V to 5V (the same as a TPS signal).

Using this, the Zex unit think that the throtle is at 100% (5V sygnal) and the arm is On (the original arm is a 12V sygnal) and activated only in the moment the hondata make the activation.

In my instalation I don't use the other compensations that Zex have for the bottle level or vacuum. I only change the jets for the N2O if I like to have more juice.

I think this can help you

Posted: Tue Jun 06, 2006 7:15 am
by j90crx
I have searches high and low, I give up where can i find a voltage converter, The closest thing i found was a converter that went in a cigerette lighter at radio shack Thank You