Outer Limits 4x4 Board

Im interested inputting a water spray system on my intercooler but i dont want to have to turn it on manually.

After a bit of googling i cant find anything on them (even though the other night when i did it i found some good suppliers etc.) Is there such a thing as a pressure switch that is set to something like:

12PSI on
8PSI off

wouldnt you want to do it on a temp basis not boost?

for the boost control side - i think it is called a hobs switch.

Welchy

not sure why you would want it on/off like that. quite possible there are switchs like that. old washing machines and dishwasher i think had similar.

i would just use the switchs or pump speed controller off water/meth injection systems.

some electronic pyro guages (like the auberins one from group buy) have an output which can control a relay for buzzer etc at set temps. could easily wire this to drive spray pump when getting hot.

i was going to set one of these up using the rear washer pump on my mav.

i think doing with temp switches would be better than doing it with boost as if you did it with boost it would be turning on and off all the time where as if you did it with temp switch it would be on and off but not as much as a boost setup.
how long will the resevoir of water last?
how much power gain will this give you for the extra bit of cooling
wouldnt it be just as easy to fit a water to air setup if you are going to all this extra trouble

Pretty easy to do it with temp switches too as they are widely available in different temp ranges. Look in the tridon catalogue for a start.

The Boost controller i run can do it, and i'm pretty sure it can be set to a Pressure

There is a wire comming out the back of it, that can be used for triggering, i thought i might be able to do it by using that through a Relay.

Just need to work out what sort of pump would work with it

http://www.coolingmist.com/
have the swiches and kits your after
i have one spraying water meth into my in take to keap temps down

Of course why do you need water spray?
Is your intercooler too small or not getting enough airflow?

Are you doing donuts which require lots of boost but no forward movement?

the wrx sti's have this from factory.

I think its just a bit of a gimmick though...

For it to work properly you still need the airflow.

KiwiBacon wrote:Of course why do you need water spray?
Is your intercooler too small or not getting enough airflow?

Are you doing donuts which require lots of boost but no forward movement?

don't forget these guys are in hot, hot, darn its ***ing hot land
intercoolers don't work to well when being cooled by hot air. thats where evaporative cooling works very well.

try the autospeed website.

they had some good articles and a build up of a intercooler waterspray system and think they even sell a complete controller for it.

tweak'e wrote:don't forget these guys are in hot, hot, darn its ***ing hot land
intercoolers don't work to well when being cooled by hot air. thats where evaporative cooling works very well.

Well yes it gets hotter there. But the difference between 30C and 40C is far more important to the driver than the engine. A 10C different in intercooler outlet temps isn't worth a retune.

I'm wondering why this guy is soo worried. If it's not cooling well enough then more airflow or a bigger intercooler will be a lot less annoying than an extra tank to fill.

KiwiBacon wrote: A 10C different in intercooler outlet temps isn't worth a retune.

I'm wondering why this guy is soo worried. If it's not cooling well enough then more airflow or a bigger intercooler will be a lot less annoying than an extra tank to fill.

Im not getting it re-tuned, no wonder everyone over here thinks you kiwis are so fucken retarted, you cant even read The sprayer would not be on all the time so getting the car retuned would be a waste of everyones time and my money.

I havent said its not cooling well enough, i didnt say i need it because my engines running hot, i didnt even say i was "soo worried". I said i was interested in putting it on, if subaru reckon its worth putting it on a factory car it cant be that bad of an idea can it (remember they have way more money than New Zealand does in total )

I might not even do it but i am still interested in it.

Thanks to all the people who did reply with helpful info, it looks like i can put this together for about $150 and that might just save my $15000 engine on a long run through a sandy creek which last year the pyro read 650 basically the whole run

MickyD,

Just read all the stuff on autospeed as i was interested in doing this to my rear mounted heat exchanger on the water to air set up i have. Well worth a read.

They use a temp and a boost switch. So the spray comes on pre empitvly(before the heat) and stays on untill the heat is gone.

Welchy

mickyd555 wrote:

KiwiBacon wrote: A 10C different in intercooler outlet temps isn't worth a retune.

I'm wondering why this guy is soo worried. If it's not cooling well enough then more airflow or a bigger intercooler will be a lot less annoying than an extra tank to fill.

Im not getting it re-tuned, no wonder everyone over here thinks you kiwis are so . retarted, you cant even read The sprayer would not be on all the time so getting the car retuned would be a waste of everyones time and my money.

I havent said its not cooling well enough, i didnt say i need it because my engines running hot, i didnt even say i was "soo worried". I said i was interested in putting it on, if subaru reckon its worth putting it on a factory car it cant be that bad of an idea can it (remember they have way more money than New Zealand does in total )

I might not even do it but i am still interested in it.

Thanks to all the people who did reply with helpful info, it looks like i can put this together for about $150 and that might just save my $15000 engine on a long run through a sandy creek which last year the pyro read 650 basically the whole run

Getting personal on comments that weren't even directed at you. Well done.

Crowning glory however, is not being able to spell "retarded".

WelchyGQ wrote:MickyD,

Just read all the stuff on autospeed as i was interested in doing this to my rear mounted heat exchanger on the water to air set up i have. Well worth a read.

They use a temp and a boost switch. So the spray comes on pre empitvly(before the heat) and stays on untill the heat is gone.

Welchy

got a link to it, i cant find it on there website??

just search "intercooler" on their site. heaps will come up.

Welchy

WelchyGQ wrote:just search "intercooler" on their site. heaps will come up.

Welchy

thanks dude

KiwiBacon wrote:

tweak'e wrote:don't forget these guys are in hot, hot, darn its ***ing hot land
intercoolers don't work to well when being cooled by hot air. thats where evaporative cooling works very well.

Well yes it gets hotter there. But the difference between 30C and 40C is far more important to the driver than the engine. A 10C different in intercooler outlet temps isn't worth a retune.

i'm not to sure with IC spraying but it should get the outlet temp down to ambient air temp if not below it !
i know guys in the tropics where removing the IC and running water injection as the IC's don't do stuff all in their heat.

i would just use simple boost. that gets the IC wet before the heat builds up and the IC will remain wet for a bit even after the water stops.
just be aware that if your on boost a lot (typical for a diesel) that you can go through large amounts of water. i would be fitting anything from 20l to 60l water tank.

tweak'e wrote:i'm not to sure with IC spraying but it should get the outlet temp down to ambient air temp if not below it !
i know guys in the tropics where removing the IC and running water injection as the IC's don't do stuff all in their heat.

i would just use simple boost. that gets the IC wet before the heat builds up and the IC will remain wet for a bit even after the water stops.
just be aware that if your on boost a lot (typical for a diesel) that you can go through large amounts of water. i would be fitting anything from 20l to 60l water tank.

There's no way an external intercooler spray is going to get you below ambient. It won't get you near it without throwing litres of water at it every minute. In high humidity like the tropics water injection and water spray is of less use than in dry climates. Look up "wet bulb temperature". As humidity rises the wet bulb and dry bulb temps converge. At 100% humidity you can't evaporate any water so there's no cooling effect.

No matter how hot it is, an intercooler still does exactly the same job. Your turbo heats the air up a lot higher than ambient, your intercooler cools it back down.
If you start with 20C, have 115C into your IC and 40C out it's the same as 40C to 135C and back down to 60C.

20-60l of water is a significant penalty. The stark reality is either displacing 20-60L of extra fuel capacity or adding 20-60kg of completely unnecessary weight.
Get a better intercooler. If it's all about copying subaru (who apparently have more money than NZ) then I recommend some low profiles and a dump valve too.

dunno on that. IF IC is big enough (surface aera) and humidity is not to high, simply because of the huge airflow over the IC you should get large amount of evaporation.
try it and see, washer pumps are cheap enough.

WI is not hurt as much by high humidity (or even using hot water). simply because it turns to steam, you still get the phase change. if it doesn't evaporate by the heat of the turbo, the heat of compression inside the motor certainly does it.
down side of course is its more expensive than spraying an IC.

the weight penalty of the water can be bad on a light vehicle. on a 3 ton 4x4 its not to bad. the hardest thing is simply finding room for it.

tweak'e wrote:dunno on that. IF IC is big enough (surface aera) and humidity is not to high, simply because of the huge airflow over the IC you should get large amount of evaporation.
try it and see, washer pumps are cheap enough.

WI is not hurt as much by high humidity (or even using hot water). simply because it turns to steam, you still get the phase change. if it doesn't evaporate by the heat of the turbo, the heat of compression inside the motor certainly does it.
down side of course is its more expensive than spraying an IC.

the weight penalty of the water can be bad on a light vehicle. on a 3 ton 4x4 its not to bad. the hardest thing is simply finding room for it.

Yes evaporative cooling can have a cooling effect, dependent on the conditions. Remember we're heading into winter.
If WI isn't evaporating due to turbo heat then you're running water into your engine. Not for me thanks.

I'm still struggling to see what the point is.
In a petrol every fraction you get the charge colder results in more fuel and more power. Hence the STI with the water spray for traffic light racing. Remember it's got a factory top-mount inter-chimney so the water spray is probably to counter the heat-soak it's just gained from sitting still above a hot engine.

But not in a diesel. A cooler charge does not give you an instant power surge.
In a diesel you've got to either tune it for the worst conditions and put up with some performance loss or tune it for more go and drive by the EGT gauge.
If you're continually hitting high EGT's, then more boost and/or better intercooler is the solution. If your engine/turbo can't do more boost then less fuel is the answer.

Carrying 20-60kg of water as a performance enhancement doesn't make any sense, especially when it needs refilled.
Carrying the same and refilling it often because your EGT's are too hot at cruise makes even less sense.

I think the OP needs to install a diesel shift light and be done with it.