Originally Posted by D.dutton9512

This is the sensor I used:
http://www.alcoholinjectionsystems.c...duct_info.html

Originally Posted by D.dutton9512

So since I've gone boost I figured I'd need something to get my charge temps down. Obviously intercooling is in the works but I wanted more. A friend suggested water/meth injection and I looked into it to find it:

• Drastically lowered charge temps
• Steam Cleaned your pistons and cylinders
• Created even more pressure to push those cylinders down

I looked at a few kits from Devil's Own and Flying Miata but they ranged from 4-800 and I figured since it's just a few simple things I could build one myself.

So I did!

If you choose to do this I recommend checking out Do It Yourself Water Alcohol Methanol Injection

My system is based on theirs with a few add ons. Either way most of the parts I used are from that site so if you're wondering about anything you see in my writup check there for the part number.

So here's the basic idea:


It's pretty simple when you get down to it. The water comes from the reservoir (I used my windshield washer tank but remember if you take this route that the washer tank isn't very large so expect to fill it once every 4-6 days) into the pump, past the water solenoid, through the nozzle, and into your intake. Obviously you'll want to rig up a way to have it turn on automatically and for that the relay and the pressure switch work fine.

In addition to those plans I installed a tank level meter to make sure I don't run out, a master switch so I can kill it if something goes wrong, and an LED to let me know when it's pumping.

On with the pictures!

Originally Posted by D.dutton9512

The first thing I did was delete my charcoal canister. I wanted my entire system under the hood and that was the only place where the pump would fit. With it removed I installed the pump (upside down to help with the gravity feed from the reservoir.


Then I ran the hose (3/4 fuel line) from reservoir, to pump, to the water solenoid. This bit ensures no water can be sucked through the system when you don't want it to be. To keep it simple just wire it with the power for the pump so you can ensure they're both on.


Then I ran the hose from the solenoid to the actual nozzle but first I had to put it together. Remember to use plenty of teflon tape when doing so to ensure a water tight seal:


Next was to install the nozzle into the intake. I chose to use a pre-tapped 1/8 NPT hole that was in the dummy throttle body. Obviously if this won't work for you try anywhere before the throttle body. But make sure that you place it AFTER the IAT sensor!