Jon,

If your motor is close to stock I really wouldn't worry about it. Besides your engine has a knock sensor. If your motor is so highly tuned that detonation could be a problem then I would measure the intake air temperature under full load. If the temp did turn out to be high then a simple water sprayer ONTO the intercooler would be the best solution. I would recommend a washer bottle and pump from the junk yard.

"Morten, w/o getting too technical....water injection essentially raises the Octane of the fuel. The injector is usually put right before the intake manifold and atomizes the liquid....as with regular injectors, you can get ones with different flow rates. As you add more meth, it then becomes more flammable and you can then advance timing more and create more power." I just wanted to clear a few thinks up here. Water injection removes heat energy from the intake air thus increasing the density of the charge. The lower charge air temp decreases the potential for detonation. A water methanol solution does the same thing and slows the burn rate "octane" of the fuel. A slower burn rate will allow you to advance the ignition timing.

From the standpoint of the rules you are much better off using only water. Rally America considers washer fluid to be flammable so it can't be in the passenger compartment.

Robert.

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Robert.

"You are way too normal to be on Rally Anarchy." Eddie Fiorelli.

What about running a snazzy oil cooler pennies to water injection might do the trick
you just want it safe we know you don't want to push your motor to the limits buying
new motors is not first on everyone's list, I just plumed my rx7 oil cooler today.

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TSSFAB.US No HYPE just parts!!!! And check us out on Facebook!!!

What Robert said.

Water injection does not make the fuel "more flammable". In fact, the higher the octane, the less "flammable" the fuel.

I made a sprayer on the spot in Colorado Springs with some garden misters, PVC pipe, a PVC valve to bleed the system, PVC plug tapped with NPT end, an NPT hose barb, a chunk of hose, and a 12V RV pump.

Got the pump at an RV place and the rest at a home improvement joint.

Drilled a hole in the windshield res. cap and ran the hose right in from the top. Worked brilliantly with 3 mister heads, once we found the right kind of misters.

Switched it with the Motec, programmed it to come on when the water temp was over X. Then 5 sec. on/5 off. (spraying rad, too.) Could have programmed it off the intake air temp, but probably not responsive enough of a system to respond quickly enough.

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Lurch
Eric Burmeister
The west coast...of Michigan

I have ran water injection for about two years on one of my cars, it was a turbo car so the gains were pretty easy to see, the kit was very simple I built It all myself, and it worked great. I used a shurflow pump and accumulator in the trunk and fed the system using an OEM STI IC spray tank. The system was a two stage system, 10psi a small jet came on and at 15psi a second jet came on but bigger in size. I used adjustable boost pressure switches and normally closed solenoids. I put in a line pressure gauge to keep an eye on the pump. The system s operation pressure was 100psi I also setup the low level sender on the sti tank to trigger a LED, on the gauge pod for low water, and pump power, stage1 and stage 2 solenoid power led’s to help me keep an eye on the system. I tested it monthly and never had a failure of any kind. What I liked was the simplicity of it compared to other kits, and for rally I would go with something simple as possible so u don’t have some expensive piece letting you down, out on a stage. It’s quite possible to carry all the parts to this system as spares for under 200$ and under 100$ if you don’t keep a spare pump.


The LED’s for the low tank=red, bottom green= pump power, next green =Stage one, next green Stage two


The solenoids and the adjustable boost pressure switches.

SteelSolutions Wrote:
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> What about running a snazzy oil cooler pennies to
> water injection might do the trick
> you just want it safe we know you don't want to
> push your motor to the limits buying
> new motors is not first on everyone's list, I
> just plumed my rx7 oil cooler today.
>
> http://www.tssfab.us/ eBay Store
>


This is what I was thinking. Could an oil cooler run "cool" enough to benefit the cooling of the air charge?

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Kirk Coughlin
Woodbury, MN and River Falls, WI

Quemadmodum gladius neminem occidit, occidentis telum est.