Water Spray

[Dom]

hey guys,

Has anyone gone to the trouble of adding water spray to their cars? Is it worth the extra weight the water adds? I know the evos have it from stock.

Any ideas thoughts would be great.

cheers Dom

[AGIT8D]

Tre-Cool on here has fitted or is in the process of fitting a meth/water inj kit to his blown commodore, he might be able to offer you some info if he's had time to test it out mate.

[Dom]

yeah i saw that thread, not to sure if i can go down that path as i am running straight lpg.

I was thinking more sparying onto the intercooler.

[Lump]

best way is to have it activate with a hobbs pressure switch when you reach a certain boost level (preferably just before to give time for intake temp to drop) but imo its all not worth the hassel.
just have a good sized fmic, cold air induction, heat wrap/turbo blanket/ceramic coating & especially a proper tune/ecu.

[tinto]

I've been looking at this for a little while now. This kit looks like it would work off all the right sensor parameters.. i.e. only when you need it and not before (or after)...
http://autospeed.com/cms/title_Intelligent-Intercooler-Water-Spray-Part-1/A_0527/article.html

[Lump]

cbf reading past the first page but im guessing its going to get complicated to get any worthwhile result?

[Saf]

I have made many kits over the years where surface area cooling has been limited, and it works great. However unlike the majority think, its not used for on the fly cooling. IE, having it boost activated doesnt do its proper job.

Water hits IC, it coats the fins, thus creating a insulator. It then absorbs the heat and evaporates. Meaning, if your IC temps are high enough to trigger it, they will only rise, before they fall. One of the best circuit systems ive devised ran off a delayed brake switch. It would spray under brakes, thus removing the heat and cold ready when the motor comes back on boost.

On the street manual spray is still pretty good, with a little LCD temp monitor next to switch so you can see whats going on.

Food for thought.

[Dom]

I have ceramic coating on the manifold although the dump and turbo were not coated like i had asked, thinking of taking it off in a bit and getting it done. (I am unsure if the exhaust housing can be taken of at this stage)

Yeah i read that article and hence why i thought i would suss it out.

I actually have a rpm meter from jaycar on which i was going to use to trigger the spray and add a hidden shift light. Although by the sounds of it i may have to rethink my plans.

ideally i would like to switch to liquid injection but after the hassles just to get the lpg i doubt it will happpen

[Dom]

saf what temp difference have you noticed??

[Jiblet]

mate did it to his Suby, took the water from the water spray o nthe bonnet, top mount, MAximum Motorsport in Malaga do it... not sure on the price..

How could it not be worth it? lower temps = more powerrrrrrrrrrr
Haven't done it on my car cos couldn't be arsed...

[Lump]

ive had it on 2 cars (both manualy operated) but ecu tune was not done with it on.
first one was running haltech & i could see intake temps drop 15deg or so but performance seemed the same.

also it didnt have a low water level alarm & the thought of it running out when not wanted is enough for me to look for reliability/performance increases elsewhere.

[Dom]

15 degrees sounds like a reasonable difference, i wasn't quite to sure what to expect.

i will have a tinker and post up here :)

[Nic_A31]

hey guys,

Has anyone gone to the trouble of adding water spray to their cars? Is it worth the extra weight the water adds? I know the evos have it from stock.

Any ideas thoughts would be great.

cheers Dom

With my Ceffy (the bigger project), it used to have a rear windshield wiper.
Windshield and wiper were swapped out, the line running to the back was looped and ran into a sunroof drain pipe....because both front and back wipers come off the one water reservoir, there's no extra weight. The rear wiper/jet is controlled by a switch near the steering column, so what I'm going to do is cut down that line running to the back, and run it out onto the intercooler and use the normal jet. The existing switch still works, so no need to wire anything up, no need to get a big bling out-of-place switch, no extra weight, etc. Easy for me :)

[Fukushima]

autospeed has quite a few good articles on this

eg http://autospeed.com.au/cms/A_1840/article.html

joe posted some good info in the last thread about intercooler sprays so maybe give the search function a bash


How could it not be worth it? lower temps = more powerrrrrrrrrrr


The spray will be most effective when the intercooler actually gets hot in use. (If the intercooler is cool to touch after the car has been working hard, then a spray won't add much efficiency.) In use on the Maxima, operating the spray and fan dropped intake air temps by about 10 degrees C when the intercooler capability was being pushed, for example when climbing a long hill. (In short bursts of boost, the intercooler doesn't get hot enough to make the spray worthwhile.)

Summer, small intercooler (eg stock), hot track leading to heatsoak- might be useful

Winter, big intercooler (FMIC) - not much point