fill it with bubble making liquid. after it spray's on the intercooler drive fast.

 

I didn't weigh the system itself, probably only a few pounds, but the liquid weight is significant, I'd say 5 or 6 pounds.
Anyway, it was a great trade-off for the cold air intake, especially since I never used it.

 

I think somewhere in ther service manual cd it says the ecu actually controls it in auto. It pulses it on and off. But it probably looks at outside air temp and intake air temp along with barometric pressure and compass heading. Who the hell knows.
With the ecu controlling it, it proably needs to see situations where the intake charge would be the highest temp. Hot day, high boost condition, etc.

 

You are probably right, but I have done some very hard mountain road driving and never heard it come on. In fact, I spent an entire day at The Streets of Willow racetrack and never heard it come on.
Even though I believe in the concept and am sure it would help performance if it worked, I had no problem chucking it.

 

OK, here are the Dyno Charts I promised.

The Dynos were done within a few minutes of each other. The car was stock at the time. First run Base run... second with no filter, open airbox (Simulating open element filter) ... third run Filter and Airbox back together but soaked the intercooler for a few seconds before dyno run then on auto. It was July in Miami and it was hot and Humid ... Like 95-100 degrees and 110% humidity.

 

and again, not to be a kill-joy but you can't get more than 100% humidity, and that would be in some form of precipitation, rain, snow, fog, drizzle, etc.

standard pyschrometic charts for air don't show more than about 70 % relative humidity at 100 dry bulb. That would put your wet bulb temp at around 90. (its hard to read at the edge of the chart. Not much of a temperature improvement to be had using the intercooler spray.

The real bonus of using it would be when the humidity of course is low. that would bring the wet bulb temp to be way lower than the dry bulb (or ambient temp).
Example: If on an 80 deg F day, the humidity is low, at say 25% RH, your wet bulb (or saturation) temp would be about 57 deg F. Spraying water on your intercooler that day could result in 23 deg lower outlet temp (if your intercooler was 100% efficient).

 

I was really just *****ing about Florida heat and humidity as I am originally from New England and hate Florida heat... but since you didn't get the sarcasm in the last line just look at the charts and take them for what they are worth.

 

well, I got it, just didn't find it funny. Sorry.
But I really would be interested to know what the real humidity was that day. It would make trying to understand the gains easier. Also help people in other locations calculate what they might expect.

It's worth knowing when it can do the most good. Might make the difference for someone on race day.
I'm actually in the same boat. fron NE and now live in NC. July and August here are pretty horrible (especially Aug). Very high relative humidity here in the summers.

 

I just converted mine to a alky system with a coolingmist pump.

 

Checked with a local TV stations historical archive and I got 84.0 degrees at 74% humidity on that time and date. That was taken at the airport. Don't know if it was higher where I was... remember Miami is built on a swamp... seemed higher as everybody lost water like nuts that day... I think we emptied out the man's soda vending machine that day. Of course the heat from all those 4g63s didn't help much.

 

ding your right..

Also I dont think the J-spec evo's have the water spray.

 

if theres anyone that would sell thier sparyer kit PM me so we can talk

 

I would like to take it out... but it's so cool. lol

 

I've always had the habit of starting the car and putting it on auto immediately.
and it does work under spirited driving.
It was also rally inspired in that any dust etc on the intercooler would be sprayed off allowing for a better flow of air.
It has a purpose no doubt but it wont hurt that much to remove it.

 

NOw thats the most believable answer.......damI m not sure what I want to do either....cuz it is on the wya of my HKS RS intake .....but it is a cool factor to have....