Intercoolers

[blade7]

Me too, though if I built a 968 turbo I'd do it.

 

[944Turbo]

I had always planned to use the redundant rear wiper wiring in my coupe to power a tank in the rear wheel well that would spray the intercooler. I figured the contents would stay nice and cool that far back and I could run a pipe under the full length of the car quiet easily.
Tony

 

[PSH]

Damn Tony....don't give the game away.....
So, this afternoon I placed an order for an intercooler water jet kit..I read all the bumph and thought, this sounds good, perhaps to good to be true. I asked a man who would know, my son, he said blow on your hand and feel how hot it feels, he then said wet your hand and blow again. That was good enough for me, his point was proved very well in laymens terms. The normal method is to have a water tank, couple of jets, pump and tube, all operated via a simple switch. I asked if he could do something more automated, he said leave it with him, may try to wire in into something so it fires the jets when needed most...
We shall see what transpires...

Pete

 

[Dan944t]

Damn Tony....don't give the game away.....
So, this afternoon I placed an order for an intercooler water jet kit..I read all the bumph and thought, this sounds good, perhaps to good to be true. I asked a man who would know, my son, he said blow on your hand and feel how hot it feels, he then said wet your hand and blow again. That was good enough for me, his point was proved very well in laymens terms. The normal method is to have a water tank, couple of jets, pump and tube, all operated via a simple switch. I asked if he could do something more automated, he said leave it with him, may try to wire in into something so it fires the jets when needed most...
We shall see what transpires...

Pete

nice one pete??

this is also something i had in the pipe line further down the road when i was happy with the cars mods.

Cant remember now who i was speaking to, but it was a friend that was heavily into real power,....and discusing my car and it’s mods , i remember him saying some thing thats always stuck with me, and he said "when you want real power come talk to me and i’ll tell you about putting water injection to cool down your engine "

never really looked into it much further than a few youtube videos but that’s always been tickling my mind from time to time. i’m not really ready for that yet got way too many other power mods to worry about to harmonise everything i e done so far together, so will be very interested to hear how you get on.

and for the record,, i’m also not in any way interested in a manual button if i was to have it, it would have to be automatic otherwise i just wouldn’t entertain it at all, it would take the pleasure out of me enjoying the car withought turning into a fast and furious caractor pressing a noss button! no thankyou not for me, i love the power but that’s my line and i won’t cross it as i like to just enjoy the power in a normal manner. disnt even want the boost gauge cluster in my car but needs must to be in my eye line.

be very interested in how your son can get it to work automatically ??

 

[PSH]

nice one pete??



and for the record,, i’m also not in any way interested in a manual button if i was to have it, it would have to be automatic otherwise i just wouldn’t entertain it at all, it would take the pleasure out of me enjoying the car withought turning into a fast and furious caractor pressing a noss button! no thankyou not for me, i love the power but that’s my line and i won’t cross it as i like to just enjoy the power in a normal manner. disnt even want the boost gauge cluster in my car but needs must to be in my eye line.

be very interested in how your son can get it to work automatically ??

[/quote]



Oh, I don't know Dan, it could be like the turbo boost button in the single-seat Palmer race cars from the 90's, push the button, instant 50bhp kick.... a bit like a video game...

There are two types of water injection, your friend may be talking of direct water injection into the cylinders, this is used instead of an intercooler and much more involved although still something that can be done. I'll be going the water sprayed into the intercooler air path which instantly cools everything down, I just didn't realise how efficient this method is until reading into it more yesterday.

Regarding making it an auto-feed, this may be possible via a temp sensor in the intercooler outlet pipe. with some electronic trickery I guess the water jet system could be set to fire when a certain temp is read, a little R&D would be required to ascertain what this should be set at?
The other thing is keeping the water as cold as possible, Tony's suggestion of putting the tank in the boot makes sense but I wonder if the water can be direct through one of the A/C pipes or would that cause issues with possible freezing?

Looks like there's going to be some more R&D on my car, my son loves this type of stuff and once he gets the bit between his teeth anything is possible, plus I have a fully equipped engineering workshop to make anything required...Things will probably happen in stages though, the first job is to get the kit and get it installed, I've not had confirmation of my order yet which may mean they are currently closed due to Covid-19, hopefully I'll hear from them soon...

Pete

 

[blade7]

Just fit a boost pressure switch on the inlet manifold, set to spray around 10 lbs or whatever. I was going to do this on my old Capri Injection turbo, but got sidetracked by a Sierra Cosworth instead. Feed it from the windscreen washer bottle, cool and big enough.

 

[Dan944t]

im remembering more now you mension it of people having to fill up with ice in there tanks! ,....i think that’s one main thing that put me off pete if i’m honest , just couldn’t be ar@@d with doing all that. if it was just a water tank and no ice needed then yes

 

[PSH]

Just fit a boost pressure switch on the inlet manifold, set to spray around 10 lbs or whatever. I was going to do this on my old Capri Injection turbo, but got sidetracked by a Sierra Cosworth instead.

that won't work Paul, well yes it will work to read boost pressure but that's not what you need to read when spraying water onto the intercooler. The highest heat can actually be found after closing the throttle from a heavy load session as all that energy is then dumped back into the intercooler which then becomes a heatsink. Under boost, there may be much less heat but yes the cooler the air under boost the more power produced. There are water spray controllers on the market which can work all this out and fire the jets when needed most, but these are not cheap. I believe they all take air temp measurements but don't hold me to that. there are some interesting video's on YT, from DIY tests to proper installs which are very informative.

 

[PSH]

im remembering more now you mension it of people having to fill up with ice in there tanks! ,....i think that’s one main thing that put me off pete if i’m honest , just couldn’t be ar@@d with doing all that. if it was just a water tank and no ice needed then yes

even common tap water is going to have a big effect on the intake temp when sprayed onto the intercooler. I'm just thinking out of the box re-combining it with the A/C, that's just my engineering mindset in play...look at some of the YT video's to get an idea of what it can do.

 

[blade7]

Just fit a boost pressure switch on the inlet manifold, set to spray around 10 lbs or whatever. I was going to do this on my old Capri Injection turbo, but got sidetracked by a Sierra Cosworth instead.

that won't work Paul, well yes it will work

Pete, you're squirting your car up and down the local dual carriageway. I suggested a simple solution to a issue you don't really have, or are ever likely to. I was modifying my RS Cosworth 30 years ago, what were you running back then? Anyway Mitsubishi and others did the water spray thing years ago, so it's not that hard to work out.

 

[PSH]

Sorry, Paul, didn't mean to offend you... there's nothing new about water spraying the intercooler, just as there's nothing new about direct injection into the cylinders. There are plenty of kits available which will do the job 'out of the box', trouble is I have never been able to just build 'out of the box' always wanting to improve on things. All I was trying to say is that controlling the system via boost is not the way to do it but yes it will at least give an automated reaction to a given boost level. Hopefully, once I have something up and running I'll be able to give before/after temp readings. There are plenty of water injection controllers on the market but they aren't cheap, I'll see what my son comes up with when he has time.

Pete

 

[blade7]

Not offended Pete []. Just reminded me of something a very well connected race engine builder told me about 35 years ago, he said "You read too much". Back then I mopped up every tuning article the likes of CCC published, and he laughed when I quoted some of the stuff I'd read. Your car already has enough power for old duffers like us, get some decent brakes and sticky tyres on it, and I guarantee you would be faster than adding more power. Corners are a lot more fun than straights.

 

[PSH]

As a last resort, I could always resort to the DIY garden hand pump method...

https://www.youtube.com/watch?v=O0MY0diHo4U