Water injection etc help an idiot?

[scooby_si]

Just wondering as i dont have funds for the intercooler i want (ie V mount or charge cooler etc) & my intake temps do like to go up somewhat on the stock intercooler when giving it a portion of the ole WOT.
Anyway bottom line what\'s the crack with water injection &/or any alternatives in terms of pros, cons & costs etc? My brain is hungry for knowledge (although limited in understanding it http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm824AXGB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/3/3_3_103.gif\' border=0> lol)
Basically would it be a wise & cheaper addition to current stock cooling system &/or performance goodies.....?
Cheers
Si

[kev-yorks]

Hi Si
       If you go on the Ausrotary site there\'s a big section in Tech reference on water injection. Those Guy\'s down there have been using it for some time and seem to know what there doing.

Regards Kevin

[memski]

Had the aquamist 1s system on previous car (will put it on the fd when I get a chance ). The one I\'ve got comes with a solonoid which detects boost pressure and activates the water injection once the preset pressure has been achieved, hence the cooling effect once you\'re on the go. Quite a cheap bit of kit when compared to a fmic kit.

Pros: lowers inlet temps when on the go, relatively inexpensive, can be used to tune around det and achieve higher performance

Cons: if the car has been mapped for use with water and you run out of water... goodbye engine    Makes no difference to inlet temps when stuck in traffic/ driving off boost, i.e smic still suffers from heatsoak.

[yonner]

re works have a realy cool watter intoercoller its about 700 bucks tho it has a rad and its like a normal pipe with a watter jaket around it

[maximtaylor]

There is no reason why you cant replace the intercooler completely with a water injection kit, you\'ll save no end of pipework and weight........

Make it 100% reliable though, boost cuts off if water out etc, as memski said.

Tim runs this way on his 1st Gen

[scooby_si]

sounds like the charge cooler your on about Yonner but cheers anyway. Hmmmm so to cut to the chase who does what & what is best on the WI front with what limitations & budget requirements......http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm824AXGB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/7/7_15_7v.gif\' border=0>
Ta
Si

[FD3Typer2]

I have a coolingmist.com kit on the way which I picked up in an RX7club.com group buy. $425 inc shipping. It\'s 2 stage with sensors to detect the water is flowing and adjust the boost levels the jets activate. i went for this one cos its cheap, and also cos he developed it on an RX7 and there is good support for DIYers (like myself!)

Can let you know what it\'s like when I get it if you are interested


Some interesting threads but loads more out there to read

http://www.rx7club.com/showthread.php?t=202767

http://www.rx7club.com/showthread.php?t=408283&highlight=water+injection

[scientist1968]

Just to add to ealier post (memski)


...the primary purpose of water injection is not to reduce intake temperatures (...thats only if you spray it onto your interrcooler).

Adding water to the combustion mix will reduce detonation and result in a more controlled burn through absorbing heat and other funky chemical stuff.
So it is useful even if you have been sitting in a bank holiday trafiic jam behind a eddie stobart lorry for an hour and you hammer to WOT on full boost !!

[Laeeq]

I\'ve got Power Development  WI System from Dragon and it does what it should.  The boost pressure sensor triggers the pump and water solenoid valve at preselected  boost and keeps the inlet temps at safe level when im giving that ole WOT;)

[FD3UK]

I had my water injection, just past the SMIC and saw a drop of 30C under full boost. I am in the process of fitting a T78 and charge cooler but will still be using water injection as well.

When set up properly it will reduce intake tempratures as well as allow higher AFR.


Kev

[scooby_si]

OK then folks who sells what variety of WI etc & how much are we talking? I\'m kinda sold on the idea/theory anyway just wondering where from now & couldn\'t at first glance see anything on the main sponsors links.
Those that have it how much have you spent on it & setting it up?
PM me if you dont wana post here.....http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm824AXGB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/4/4_18_6.gif\' border=0>
Ta
Si

[John Yorke]

I know REworx have a custom kit made up using the same pump as mine and as I understand quite a reasonable cost. You have yer Aquamist kits [I\'m sure if you type in http://www. ....... you will find it] other than that have a look round, but, it might pay you to have a chat with Geff 1st though.

Hope this helps

PS: since fitting my WI my temps under booooost are a revalation [sp] :o

[Hawkmoon]

I fitted an aquamist kit to my last car, a MR2 Turbo.
Very easy to fit, kit even included a tap to thread the hole you have to drill.
The advice i was given from the guy selling them was to get the nozzle as close to the inlet butterflys as possible as if it is put just after the intercooler you lost a lot of the cooling effect.
I also fitted a washer bottle with a low level warning light (got that from a scrapyard) so i would know when to water level was low and not drive to silly.
You may have to get the car on a rolling road afterward, i certainly did on the MR2 as it ran like cack after fitting, once it had been set up it drove lovely.
Dunno what the total cost was, kit was about £300 then the set up on the RR, probably about £400 in total.

hope this helps

Nick

[bnaellis]

Primary purpose is  to lower combustion temps.
You can use two nozzles one on the pipe just after intercooler
to kill intake temps and one in or as close to the throttle body to kill combustion temps.
I tuned a car to 1.4 bar of boost with water injection and the max knock at peak torque was 14 either side of peak torque was around 3 & 4.

rgds

[Hawkmoon]

If you do go for an aquamist system, get the more expspensive one, it has a warning system to let you know if the jets are blocked.
Dunno if any of the other systems on the market have a warning system, but if i ever do buy another it will be a feature i would want, as it was allways at the back of my mind when i was booting the car.

Nick