View Full Version : IC water spray

04-20-2003, 01:16 PM
Was watching some show on Speed Channel and they did a special on the Imprezza STi. They started talkin bout a Water sprayer the sprayed the intercooler with a switch from the inside "for an extra boost of power".
Would this actually work or is this more of a gimmick thing?

pro street rich
04-20-2003, 04:10 PM
Last year I posted some pic's of a sprayer for the inner cooler to bring down the temp.. It was a simple deal and the cost to make the system was less than $20 and a few hours in the garage....Rich

04-20-2003, 04:12 PM
yes it works... its actually doing two things to boost power... initially before entering the combustion chamber it cools the charge, second during combustion, water expands greaty when heated... especially to those temperatures, and the extra expansion of the water vapor in the combustion chamber on top of the regular combustion of the fuel and air pushes down on the piston with greater force... i.e. more power

04-20-2003, 10:14 PM
this actually sprays water internally or did i misunderstand your post?

04-20-2003, 10:19 PM
yes... its sprays internally... I misread your post... I see now that is says sprays the intercooler.... my bad... but... that kind of sprayer does exist... it comes stock on a Pontiac GTP... my neighbor has one

04-20-2003, 10:22 PM
Wouldnt spraying water internally ruin the engine...Does the external IC sprayer actually work....might be a fun project if its worth it

04-20-2003, 10:26 PM
its a regulated amount of water.... if too much is sprayed in... yeah... it might ruin something... but this small amount acually gains power.... the small amount will expand... but if too much goes in... there wouldnt be enough energy to turn it all into vapor..... the water is also "atomized" that is... its sprayed in a fine mist.... so dont be adding water to your gas thinking its the same thing :rolleyes: Im not sure on the amount... its not like its dumping buckets in that it will hydro-lock or anything

04-20-2003, 10:29 PM
You know if the external sprayer makes a noticable difference...ever driven your neighbors car and used it or sumthin

pro street rich
04-20-2003, 10:52 PM
Like I said before, I made and posted pic's of a sprayer. I have it on my daily driver and if you are pounding it you can really cool off the inner cooler with it. They are eazy to make and like I said, less than $20 to build.....Rich

David Neibert
04-20-2003, 11:02 PM
... but... that kind of sprayer does exist... it comes stock on a Pontiac GTP...

It does not come stock on GTPs. If your neighbor has one, it is an aftermarket add on.


04-20-2003, 11:17 PM
Hey, I couldn't find your original post but found some pics and some instructions you posted. would you need some kind of pump? I'm not very mechanically inclined but like to think i am...help me out please? :D

04-21-2003, 12:56 AM
nos has a kit that sprays nitrous on the intercooler. it's pricey though, i think about 450. my friend has this on a golf 1.8t and he siad it feels like he added about 50 hp.

04-21-2003, 01:26 AM

04-21-2003, 01:50 AM
i think your friend with the gtp is taking about his water injected bong he smokes with

04-21-2003, 02:09 AM

04-21-2003, 07:38 AM
I dunno... thats what he told me about the GTP... probably is on crack... but thats how the water works... I knew about the water before he told me about the GTP....

Aaron Pedroza
04-21-2003, 12:07 PM
1) You can spray water on the outside of the IC, I had one and it does help when the IC is really hot but won't do much for the drag strip.

2) You can also spray water inside the intake which works really well to cool the charge but it is pretty detailed on the amount you spray in and should use a high pressure pump and some kind of injector nozzle for good atomization. I use alcohol for even better results.

3) N2O on the cooler works too, much like the CO2 sprayed on the IC to actually supercool the charge going throught the IC. Problem with that is it is really hard on the metal. Frozen, then hot, then frozen, then hot really stresses the metal and WILL crack it eventually.

04-21-2003, 05:36 PM
it didnt work for me, I just got funny looks when I left water everywhere, so I took it off:confused:.

pro street rich
04-21-2003, 06:25 PM
I took a windsheild washer bottle and pump and used that for the pump and for holding the water, or alcohol whichever you want. I hope this will help you....Rich

04-21-2003, 06:27 PM
thanx rich, ill give it a shot when i have some time

Scott Long
04-21-2003, 11:36 PM
Since when did GTP's start coming from the factory w/ intercoolers?

04-22-2003, 12:02 AM
I dont think they have an intercooler... this is an internal spray in the intake that I was talking about... if it even has it... I dunno... never really looked at the car close... its freakin GM!! who cares!

2 Hot 2 Handle
04-22-2003, 01:01 AM
Uh, Duh... geese..I think I have one of those thingy ma-jigs on my SC!
Really though, I do.
I have an alcohol/ water injection system on my 92. Its setup on a adjustable boost reference switch & an adjustable MSD box...so when I get a preset Boost level & rpm (13psi & 3800rpm) together, it activates the system.
I have a high pressure pump in the fender under the battery, and I'm using a 93-95 style washer resevior. the nozzle is in the lower IC tube mounted near the lower intake adapter. Notice the nozzle & solenoid in the photo.

It does work...If the car is on the knock sensor it will effectively deter detonation...but...Its very hard to get predetermined performace results, in other words sometimes it will help 1/4 ETs while other times it seems to slow the car down.
Its very hard to get the desired amount of injection the the point where its needed most, without handicaping you....tooomany variables.
I need more time on a dyno with the system, to get things worked out...nozzle size, and the best rpm/boost level to activate the system. I recently had the car on the dyno but chose not to use the system as there were several SCs that were in line to use the dyno that day, & I knew it would take some work to even begin to utilize the system.