Hol

iTrader: (1)

Im going to use the standard logic of the waterspray on my 03STI to run my water injection.

Because the auto function can map to boost & intake heat it will be a lot better than just an ERL boost switch. And aI get the benefit of a nice separate water bottle with a low level warning light.

johnfelstead

Pete, you sad ****, when you know something about a subject then your input is welcome, in this instance you know **** all, so shut your gob.

Only done castle comb a couple of times and didnt time myself, so couldnt comment on that i am afraid. It's not a circuit i like to be honest.

johnfelstead

for WI intake temp isnt a useful sensor input. That value is read at the airbox intake where the MAF sensor is located (its part of the MAF on new age cars), and is not a charge temp reading. For best results WI should trigger on at 42 degrees C charge temp and switch off at 38 degrees C charge temp, with a boost reading of 6psi and above, below those values WI will lose power. You can of course just use boost for WI triggering, but most of the time this will lose you power as its not that common to be over 42 degrees charge temp on a road car, once on the move.

Nick Read

I think I've mentioned this to someone before, but if you're interested in water spray, water injection, charge temps, cold air feeds, intercooler location etc then you could do a lot worse than look into some of the DIY thinking, testing and making that goes on at http://autospeed.drive.com.au/

It's an Aussie website and these guys really know their stuff - informative at all levels and they don't take ANYTHING for granted in the world of tuning turbocharged motors. Every idea is tried and given the thumbs up (or down). Definitely worth a look.

pslewis

Oh, dear ............ a SENIOR Moderator has got a little hot under the collar (could it be the description fitted just a little too well??? )

And who thought up the term Senior Moderator???? I admire your efforts and time freely given ................. but, do me a favour - jobsworth titles?????

Come on, we all know the water Spray thingy is a toy which does bugger all useful!! Anyone know how much power is drained by carrying around 20 Litres of water???

Pete

johnfelstead

Why dont you ask Nial McShae or Martin Rowe? They decided to haul that around with them on their Production World Rally Championship winning seasons in their Prodrive built production based Impreza rally cars.

pslewis

I very much doubt they would bother with such junk whilst taking little Jonny to school ............ do you??

I doubt they would wear helmets and a full body harness either ........... and the bump over the kerb at the Park wouldn't justify a Rollcage I am guessing??????

So, why really bother with something as pointless as a water spray unless you are trying to shave 0.0000002 second off a Rally Stage??

Like I said ..................... utterly useless piece of kit!

Pete

Nick Read

Pete, I guess you got the '20 l. of water' thing from my hypothetical example? Well for a start, carrying 20 litres doesn't drain your power in any way at all. You could pull a caravan behind you and you'd still have the same amount of power. But that would be pedantic as I'm sure you don't mean THAT.

I ASSUME you're raising the question of how an extra 20 litres (or 20kg in weight) would affect your power-weight ratio? Well if you're worried about an extra 20kg on top of a road-spec Scoob, which must be - at a guess - 1300kg if not more, then you're talking about a difference as insignificant as 0.000000002 seconds over a rally stage... that you yourself quoted as the reason why water spray was a waste of time LOL

The fact is that a road spec car does not need a 20 litre water tank because it's on-boost duty cycle is nothing like a competition car's. However fast a driver might like to go on the roads, it's impossible to drive around on full boost or full brakes all the time, therefore that amount of water is not necessary. A 2 or 3 litre reservoir will easily do the job and will provide that extra margin of engine safety in real world driving situations that you meet on the road - e.g. sitting at the lights for half a minute in the height of summer then you want full boost available when they go green, a fourth gear overtake to pass a long line of crawling traffic.

The difference it makes might be small in everyday driving but occasionally it can be handy, and the weight penalty it carries on a road car is so small that you might as well have it, rather than not. There is no downside to IC water spray, although there are certainly much better ways of controlling the 'auto' function and the key to correctly using it in 'manual' is to spray BEFORE you are going to cane it, not during or after.

It's basically a free of charge power restorer; I can't understand what possible argument there can be against that. It would be like if Optimax was the same price as normal unleaded and you chose not to use Optimax because you didn't think it was necessary. You won't make more power than the engine is tuned for by using Optimax but you'll sure as hell lose power if you don't. The actual amount that you lose isn't the issue - it's whether you're happy to lose it or whether you'd rather use something that's free of charge to get it back.

automodellistagt

but there is no homogolation rules now, because of them moving to WRC rules rather then the groups. ?

Its half and half: a gimmick and a useful mod.

When sitting in traffic on a sunday blast following that campervan doing 10mph, spraying the water will lower the temps, meaning that you can get back on boost quicker and enjoy the rest of your drive

pslewis

To get on boost quicker????????????? What are we talking?? 1 second???

FFS it DOESNT matter on normal roads unless you are driving like an absolute PRATT!!

Like I said earlier ................... pointless!!

Pete

johnfelstead

There are homologation rules, for the Production WRC Group N cars, thats what the Spec C is built for.

The spec C carries a 20L tank, the other STi's have aprox 5 litres of capacity to reflect their lower requirement of water usage.

pslewis

Does the EVO have a water spray system??

Pete

Gary C

Yes

Never really used the EVO V manual system, more than enough power without messing with a little switch.

Never noticed the difference in using it on my EVO or my STi. The GT4 did not have it and I did not miss it.

johnfelstead

They have a FMIC.

JTaylor

Really sorry to highjack (briefly).

JOHN,

would you mind having a look at this

http://bbs.scoobynet.co.uk/showthrea...83#post4952383

please.

Thanks in advance

stevie boy

makkinens defo has water spray, don't no if all VI do? and was it not the VII that used some form of condensor (or something) so you didn't have to fill it up with water.

stevie

MadMark

"Oh look Sammy - its a flying Pig"

automodellistagt

To add to that an intercooler is air to air

a chargecooler is when they use air-to-water-to-air

a little radiator is added, this cools the water, that then goes to a reverse radiator that cools the charge air

Gary C

And water spray too

Generally manual up to EVO VI and auto after that,

Some of the Toyota GT4 CS's (often called the GT4 CS'WRC') had extras which included a water spray system, but it was never connected by the factory. Not needed on the road car, only really there for homlogation.

Their is no doubt that it worked on rally cars, but I think their is also little doubt that it was included on many of the non-homlogation road car versions to give an aura of 'rally car' specialness as 99.9999% of the drivers would have no idea when to use it.

pslewis

The IC Water Spray Discussion Group:-

http://img.photobucket.com/albums/08...SNAnalClub.jpg

Pete

Gary C

Oh, go wash your incontinence pants

EBRWRX

I'm in the strange position of actually agreeing with young Mr Lewis on this point. Reading through the bs, catfights and views the simple explanation seems to be that for 95% of Scooby drivers this is about as useful as a dysfunctional **** at a suicide bombers reward in heaven.

I include myself in that 95% bracket, along with that other worthless pile of poo split diff thingamejig. Both of mine haven't been touched from new. However for 5% of drivers these things are important, are used and most importantly are UNDERSTOOD what they are being used for, so PS is (as usual) less than constructive in his response.

wakeboardar

ok this lewis guy is a *** but have to say he is very funny

Gary C

PS Lewis

Its like big brother

You know most of it is crap, and bound to annoy, but you just cant resist checking up on the latest episode

TonyBurns

iTrader: (3)

Pete, its not there to increase power, just decrease charge temps, but in your opinion its like the turbo on your car, useless

Tony

a1oku

gem!!!keep up the good work!!!nerds dont like bein pictured!!!they neva recognise themselves!!!gota go and squirt my nozzle.

DPat

If you sit in traffic and the intercooler gets too warm then max boost is reduced (noticably and significantly), only when the intercooler temp reduces after forward motion (increased airflow through the IC) does max boost return

Much more than 1 second

So tell us then, being a Pratt, how do you drive

pslewis

Let me guess??

You're the one on the far left in the nerd/geek photo above? right??

Pete

ScoobLou

iTrader: (21)

This guy rocks are u single

turbo it

iTrader: (-1)

thats bull believe me when your using the car on track on hot days it makes a massive diffrence to how the car performs, ive had mine mapped in to spray on charge temps etc and would typically use over a litre of water in a 15min session, but as ever in mho. cheers Rob