water/air intercoolers?

Simon

No experience, but curious why you would want to ??

CheersFidei defensor

Rosco

Simon,
I'm curious too. I have not heard of a water/air intercooler. Would it use a separate water reservoir or the vehicle's original cooling system?
I had some over-warming issues with my 4.2GU T/D too, but after changing my viscous hub for a new genuine Nissan jobbie, putting a bonnet scoop (off a 3 ltr Patrol) on the passenger's side over the turbo, and also re-fitting the plastic air ram to the bottom of the chassis just behind the radiator, I seem to have cured my problem.
During my investigations, I came across a mob in Qld that make alloy radiators, oil coolers and intercoolers. I can't think of their name at the moment, but I know one of the forumites with a 4.2 Patrol did lash out the $1100- for one of their radiators. It was all covered about a month ago...do a search and you'll find their name. Another possible solution would be to stick with the air/air intercooler; but use a top-mounted one.....and place an electric thermo fan over the top of it, which you can turn on at any time (eg: when you're going too slow to get any air-ram effect through a bonnet scoop. I've seen photos of that done successfully.
Let us know how you get on, please.
Cheers,
Roachie

Like these ones ?? A good write up here.

http://www.are.com.au/Inter/air_to_water.htm~

Talking to a few blokes on outerlimits with it on various vehicles. It works well... You need another form of radiator, waterpump of some form, and other things.

All depends on what you want the truck for.. if its short course comps then its a good idea..

They create heat issues, as your radiator for the intercooler sits infront of the radiator, and heat is transfered into the normal radiator... They do give more power... But is the expense worth it is the question...

Another option is a water sprayer onto the intercooler, such as windscreen washer bottle, pump, and extra jets like for the screen to spray water onto the cooler. This works VERY well for the cost of it!

As someone else said the www.are.com.au site is good for turbo info.

thanks guys

i might give the water sprayer idea a try wont cost much too give it a go

Simon
Personally i would stay away from the water to air on a diesel, because the two dont want to mix or it is an expensive job to put the leg back in bed .........having said that, alot of heavy duty diesels use the water to air coolers when they are stationary or constant rev alternators etc.
Use of a garden spray nozzle coupled to a washer bottle and pump, coupled to a switch on the throttle gives some good benefit for little outlay.
Andrewwheredayathinkwer mike?

Simon.
What you propose is good in theory but a bit messy to construct, the main problem is excess heat under the bonnet. THe simplest way to solve the problem is to replace the oil cooler with a bigger unit, but dont place it in front of the radiator, place it where the hot air will not end up under the bonnet that way the heat load on the radiator will be reduced by 30%. This is well proven on trucks and bathurst race cars. Eric.

simon
As far as I understand
The hole idea of liquid to air aftercooling/intercooling is that your engine output power will be constant through out the power range, engine coolant is used as it is at a constant temp. keeping the air temp constant, but this is old tech. as it cost power to keep coolant at this constant (larger radiator, fan, coolant pump etc.) so thay changed to air to air intercoolers to gain the use of the free air as the vehicle is moving.

Regards

Richard

Water/ air is excellent if you use it on a boat!
I worked for cat, on lots of big boats.
The sea water stays at a constant 20 degrees, and theres plenty of it, so you could imagine the cooling capacity of an aftercooler used in a boat, this is why you can always get more hp's out of the same engine in a boat compared to a truck.
The radiator water in your truck will sit at 80-85 deg, which helps enormously, as the compressed air is much higher, but is it worth the cost? An air/air is still the best for long highway runs.

pwr do a kit with their new 'barrel' air to water intercoolers, has a small radiator with a thermo fan and a circulating pump etc. have a size that can easily support 400Kw petrols so should have one to fit your diesel . Won't be cheap though, if you can you could try to fit a slim thermo from davies craig under your existing unit and switch it manually or on a temp sensor.Just killin time till easter...............go and play in the dirt, instead of workin in it......