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Old 07-22-2003, 20:06   #1 (permalink)
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Intercoolers

What is the best, Water - air or air - air?

Has anyone got a pre-AU and post-XF ford with a cooler?

I'm trying to get as much info as possible. Including power gains and boost loss.

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Old 07-22-2003, 20:18   #2 (permalink)
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Re: Intercoolers

IMO, water-air are better. A preperly set water-air cooler can be more efficiant than an air-air, as you can control the temp of the cooling fluid. With ari-air, you are depending on external temp to cool your charged air, and on a hot day, an air-air can actually increase air temp rather than decrease. With water-air, you can put ice in your header tank, or run an extra ice box to run the water over, and you can also set it up with an aircon type system to cool the air, so it is much more efficient than an air-air.
The other reason i like them is there is usually less plumbing. As an air-air needs air flow to work, it generally needs to mounted in the front of your car, so you have long pipes from turbo/blower to the cooler, with can atract heat soak, and slow air speeds due to bends, then the intercooler/interheater in front, and then more long bendy pipes, with more heat soak, and then finally into the TB.
With a water-air, you can put it directly between the blower/turbo, and the TB. Less bends, less heat soak, more direct travel for charged air.

But as i said, this is just my opinion.
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Old 07-23-2003, 05:55   #3 (permalink)
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very informative mate
what do these water-air coolers look like?
radiator looking like the usual ones or sorta like a muffler type thing that ive seen before?
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Old 07-23-2003, 06:38   #4 (permalink)
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Re: Intercoolers

LTDHO, you have a PM.

Sorry guys if I had the info in a digital form I would post it.

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Old 07-23-2003, 15:23   #5 (permalink)
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water-air coolers have 2 type radiators, plus pump, container. 1 is in engine bay in the path of the air from the blower, the second is up the front of the car that is cooled by the atmostphere (sp??) air.

Mick, PM replied.
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Old 07-23-2003, 18:49   #6 (permalink)
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Re: Intercoolers

Here is a picture of a vortech water-air cooler fitted in an engine bay. Sorry its a holden engine bay, but i could not find a pic of a ford engine bay woth one.
As you can see, the air flow goes thru the cooler in one direction, and it has a water-air core inside from which you can see the water line on the radiator side coming out.
The water flows from a water tank into a front mounted cooler ( trans cooler is the most commonly used item ) then into the water-air cooler core, and then back to the water tank.
Fill that tank with ice water, and cool charge all day.
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Old 07-23-2003, 23:01   #7 (permalink)
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Re: Intercoolers

Pros and cons both ways. What happens when cold water runs out??? But yes ideal for drag racing etc..A good ecu should be able to tune for hotter air and protect you're engine.Thats if it is set up right....
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Old 07-23-2003, 23:20   #8 (permalink)
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how much would a water-air or air-air system cost to set up?
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Old 07-24-2003, 01:03   #9 (permalink)
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Re: Intercoolers

ebxr8240 is right on all counts. Water does eventually get hot, and a correctly tuned ECU does compensate for hot intake temps, but i have seen tests done on cars where the same car, on 2 consecutive days, of equivelant temperature, day 1 with air-air cooler, 2nd day with water-air cooler, both coolers were equivelent to each other, and the water-air cooler returned cooler intake temps and higher power figures on dyno. I can not remember what the difference was, but i can remember that it was not heaps, maybe 10 kw's and 10 degrees diff.
At the end of the day it comes down to personal preference, front mounts look cool, but have heaps of pipe work, water-air have less pipe work, but do give that sleeper look on a stockish looking car.

I personally would go the water-air, but thats me.

On the other side though, archies's mazfix series7 RX7 runs 7's onthe qtr, and runs frount mount air-air, the fastest water-air cooled car is only in the 8's ( Form memory )

As for cost, depends how far you want to go with it.
CAPA are a good place to start for ford kits, of rine PWR Coolers for a nice custom job.
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Old 07-24-2003, 05:11   #10 (permalink)
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Re: Intercoolers

I think that's to do with weight. But most drag cars also have no rear view mirrors or radios......
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