It seems that the UK models with the headlight washers have an ideal place to take for an IC water spray - with all the electrics plumbed in. Anyone done this? Suggestions on nozzles and extension hose to use and where to mount?

Hi John,

I've seen some UK cars posted on here before with the w/spray fitted. MRT sell kits (STI, I think). Usually, the water tank is fitted in the boot (next to light cluster on r/hand side).

The switch is usually next to the fog switches on the right of the steering column. There's two little blanks which can accept the OEM switch directly.

If only search was working :(

Stefan

P.S. Did you get through to Michael on his e-mail address. I might still have hios original one from way back.

have you looked at the nozzles available from ERL? they are available individually as spares. only problem i think is that i think the ERL pumps are very high pressure, considerably higher than that of the washer pumps.
what about, i know it sounds stupid, but fuel injectors? would these work, as the fuel is not too high a pressure (50ish psi?). you could then control the rate by pulsing the injectors?

may be a rubbish suggestion, but ive tried :)

cheers, ian.

The ERL WI jets work pretty well with a standard washer pump, BUT, to be honest, I found very little benifit with water spray, max of maybe 5deg'C. Barely worth the time, and effort.

John, bite the bullit, see a few more patients, get a FMIC ;) and WI :D

Mark.

John,
go to www.autospeed.com (sorry dont know how to do a link). go to the bottom of the page to 'search' and type 'water spray'. bring up loads of articles on tests they've done.
think there are some done on scoobs. remember looking a while back, one of their tests showed a 4 degree reduction in temp.

5 degrees would be welcome for such a simple modification. It will just help a tiny bit on hot track days if I keep it the good side of 45 degrees. If I turn the boost down from 6000-7000 RPM it does not seem to go too hot in road use. Maybe I should change up a bit earlier too :D

Like this Autospeed Water Spray Articles

Stefan

thats the one ozzy :rolleyes: :D

It's the only thing I'm good at ;):D

Alan has pointed out two nice little indentations on the scoop which seem made for the job :)

John,

get the STI Type R intercooler plate for the bonnet - comes with proper holes - I got mine for free (I wonder who from....thanks Mark) also got the STi nozzles for free from Park Lane - so all it cost me was a washer motor or two.

Do NOT get the cheap universal pump from Halfords - everytime I go on track it lets go in about four laps! Get the next one up - drenches the intercooler and lasts a few minutes longer.

Trout :D

PS Also has nice Forge water tank in the boot, and WI which is lovely!

Come on John... Knock up a circuit that will control water Injection and WaterSpray as I want both... then youd be saving me a job...

David

Thanks guys, I'll start with manual control from the headlight washer motor which Subaru kindly provide. Will try to get some nozzles.

For a circuit I think the next one will be alarms for high EGT or intake temperature set at 850 and 55 C so I don't fill the car with gauges.

Loosening off the actuator has dropped the top end boost only slightly from 6000-7000 RPM but had a substantial effect on intake temperatures. Midrange boost doesn't seem to make anywhere near as much difference.

I would be interested in seing what you do for nozzles...

David

Don't you guys have micro-irrigation in the UK?
Just use a 180 degree nozzle. Works like a charm.

Also, remember to fit heat resistant hoses, else they tend to come loose...

Electronic controller is simple, and much cheaper than MRT charges. Monitor boost, coolant temp (although, EGT might be a better idea). When both exceed preset values, spray... Think it might not be a bad idea to use a timer to let it spray for at least 2 or 3 seconds at a time...Else it will toggle the whole time when you are driving in the target boost region...Other cool features you might want to add: Manual Spray switch, and de-activate switch (to deactivate spray controller).

Bruce,

Have a read of that Autospeed article, it's very interesting.

John, I'm sure you've already thought of this but you're not going to spray water and washer fluid onto your intercooler are you??? :eek::eek:

Matt :)

No washer fluid is for winter when it is raining - when it is raining I don't need spray. The bugs can just **** off :p

Dont GGR do a kit? (everything i think!) think its on their site somewhere but dont have the address :(

Tony:D

Here's the link to the MRT one.

Are you looking to make a DIY one ??

Stefan

NB. Michael mentioned on his website that his splitter will prevent the spray from reaching the back of the IC when the air flow is split.

[Edited by ozzy - 5/7/2002 4:04:09 PM]

A good one to use is a headlight washer pump as these pump much higher pressure than feeble winscreen washer pumps. I used an audi headlight pump in a car ages ago, and it was able to generate over 70psi. Check first though in case there is a safety cut off if pressure gets too high due to the small water flows that might be used for WI, as these pumps are also designed to flow a reasonable amount of water. Also if possible use a container that you can pressurize as your reservoir. That way you can feed boost pressure into it as well, so spray pressure will always be x psi above boost pressure. Some plastic header tanks can be useful for this, although modify the cap so it doesnt vent above 15psi ( or whatever it happens to be )
The autospeed setup does seem to be prety good, esp the intelligent intercooler water spray, although this is a different ballgame to water injection.
But all this is only messing about. Go for a good FMIC. It will be more reliable, give better temps, freer flowing, no water to top up ( or more importantly run out ) pipes to burst, pumps to fail. the list goes on...

[Edited by ustolemyname??stevieturbo - 5/7/2002 10:59:15 PM]