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hairbrained idea, using the ac system to contruct an air to water intercooler [Archive] - Toyota MR2 Message Board

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hairbrained idea, using the ac system to contruct an air to water intercooler [Archive] - Toyota MR2 Message Board Toyota MR2 Message Board > Toyota MR2 Generations > MK 1 MR2 - AW11 > hairbrained idea, using the ac system to contruct an air to water intercooler PDA

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Senko04-25-2006, 05:48 PMok guys,

I have been thinking of how to properly cool the intake charge of my twincharger project. so I thought about an air to water intercooler because it does not need direct airflow to cool the system. then I thought about, welll ac systems get air very cool, so why not utilize freon to cool the intake charge. what about changing the ac system to cool the intake system. canadam04-25-2006, 05:59 PMI've always wondered if it would be beneficial to use the AC system to cool the water in an A2W intercooler. Senko04-25-2006, 07:07 PMyeah, Im wondering the same thing myself. sept why even have the ac cooling water, instead of cooling the intake itself instead of an intercooler. AceX04-25-2006, 07:26 PMUse a heat exchanger. Gonna be just as effective at speed. Only benefit this could have is for when the car is stopped or at a very low speed. Doing this properly is going to be very expensive. SpeedballTrix04-25-2006, 07:33 PMIve thought about this alot... it doesnt really work (in my head) =P
The AC system in a car doesn't really generate any pressure... it just blows.
In order to cool the intake air you would have to run the AC air through a heat exhanger isolated from the intake air, which requires pressure. Even if you could get the AC to generate sufficient pressure to move the air quickly enough to actually cool the intake air, the power you would lose driving the compressor would kill any gain you get by cooling the intake air.

The best way to cool your intake charge is a water to intake air exchanger followed by an ambient air to intake air exchanger.
The reason a water to air intercooler works is that the water pump is driven electrically. Ncturnal04-25-2006, 07:39 PMThe Beast uses the AC system with the A2W setup. canadam04-25-2006, 07:43 PMWicked, I'll check out the website.


The Beast uses the AC system with the A2W setup. TheAmazingDave04-25-2006, 08:15 PMYou stole my idea!!! Well, I'm sure many have thought of this. My plan is to use a 12v RV refrigerator compressor so you're not draining excessive power from the engine. I was then going to use the evaporator out of the same refrigerator and build a coolant tank around it for the A2W IC piping. I don't see how a standard front-mount heat exchanger can match the performance of a 33 degree chilled water tank. SpeedballTrix04-25-2006, 08:43 PMAnd the Beast has, what, a billion hp? Ncturnal04-25-2006, 09:23 PMAnd the Beast has, what, a billion hp?

If was one of the forerunners of the high HP MR2s.....one of the first to hit the 400 mark IIRC. It is presently at 350 extremely well-tuned, smooth, reliable RWHP. I arranged a tuning session for several people in Atlanta with "The Hitman" (www.hitman.hm), the most renowned Haltech tuner in the world. I can safely say it's the smoothest 350 HP you will ever come accross. If you didn't know any better, you'd almost think you are driving an NA. tgidavid05-24-2006, 01:34 AMright on Ncturnal! I've been wondering about doing this as well but I shyied away from this idea for the following reasons(personal reasons BTW).

1) I figured the power gained would be lost running the compressor on a lower HP car
2) An AC cooled intercooler would cause condensation to build inside the intake charge and thus create hydrolock in certain situations.
3) I hate messing with the A/C circuitry and have no way of programming it to run when I want it to run.

KUDOS to you! Perhaps I should revisit this idea. Ncturnal05-24-2006, 01:40 AMI didn't do it, Jim Griffin did. :) Senko05-24-2006, 08:33 AMwell that answers my question, anyway to contact the beast and ask what he used for his setup? Raptor13x05-24-2006, 10:31 AM1) I figured the power gained would be lost running the compressor on a lower HP car
2) An AC cooled intercooler would cause condensation to build inside the intake charge and thus create hydrolock in certain situations.
3) I hate messing with the A/C circuitry and have no way of programming it to run when I want it to run.
1) It does use more power than you get from it, but the advantage for performance is that you can leave it on before a race, then shut off your AC, and you have several minutes of super-chilled water running through there giving you sometimes lower than ambient intake temperatures and greatly improved performance until the water heats back up.
2) There's no way it could create that much condensation
3) The AC button on the dash is too complicated? SpeedballTrix05-24-2006, 11:24 AMI know the Beast and my point is that it is a high hp car and it's got quite a bit more hp than a 4A-GTZE is goign to have... which makes running the AC compressor more damaging to final power delivery.

Im not knocking it's ingenuity... it's a very neat idea and if you do it and it works then w00t for you. But there's nothing it gives you that you can't get some other way for less. Shinomori05-24-2006, 11:28 AMWhen Ford showed it's prototype for the next gen lightning, it had the system I believe they called a SuperCooler.

It used the A/C system to fill a tank with really cold air (less than 30 degrees F). Then on a push of a button it would spray it either in the intake or on the intercooler(don't remember).

It came out to about a 30 sec boost of around 50hp and took somewhere from 2-5mins to refill the tank(again don't remember the details).

Not what you're talking about, but a pretty cool way to get extra power out of the A/C. TheAmazingDave05-24-2006, 07:30 PM1) I figured the power gained would be lost running the compressor on a lower HP car.



My plan is to use a 12v RV refrigerator compressor so you're not draining excessive power from the engine. SpeedballTrix05-24-2006, 08:01 PM^^^ I also missed that.
Good call.
Thats actually exactly what I was getting at by saying "get some other way for less" but was too lazy to elaborate =P

Also... about that SuperCooler... you can easily get a much better effect which is instantly available by using CO2 (or other phase-change gas) sprayers.
The only downfall is that this isn't rechargable anywhere that there's air like that Ford SuperCooler =P Mekkahfire05-24-2006, 09:17 PM2) An AC cooled intercooler would cause condensation to build inside the intake charge and thus create hydrolock in certain situations.


Ummm.... And water injection does what? :O Senko05-24-2006, 09:27 PMpl, well I know I am about to get completely bombarded here, but what about using an alcohol based air to water intercooler setup?all I would really need is a carbed electric fuel pump, an exchange tank, a radiator, and fuel line. I think that this idea would be cost effective as well as benefitial to the engines performance, yes I do understand that alcohol is a flamable substance, But I also understand that it has a high heat disapation effect. Ever blow on alcohol on your skin? gets really really cold. SpeedballTrix05-24-2006, 09:32 PMHighly possible.
But like you said, alcohol is dangerous.

I would feel safer with a phase-change gas sprayer.
CO2 is pretty much harmless =P Senko05-24-2006, 11:09 PMyes but it would be higher upkeep as well to run co2. in a sealed system the alcohol would last as long as the system did not leak. and would only get better over time as ti would constantly be distilled over and over again in the exchanger, and holding tank. heck, put a tap on it for parties LOL Raptor13x05-24-2006, 11:37 PMI still think the best thing to do is just axe the whole A/C system. canadam05-25-2006, 12:43 AMWouldn't using alcohol be a poor choice for a heat sink in an A2W intercooler setup ? Ethanol has a much lower specific heat capacity than water (Ethanol: 2.460 J·g-1·K-1, Water: 4.183 J·g-1·K-1). This means that water can absorb much more heat energy than ethanol can before the temperature raises one degree celcius. This allows the heat exchanger to remove more energy from the liquid before the system becomes the same temperature as the liquid it's trying to cool- at which point you're doing no good. Heck, even "coolant" lowers the specific heat capacity of pure water. Senko05-25-2006, 01:48 AMtrue but you are only thinking about one side of the system, you are forgetting that the alcohol is being cooled by air rushing over a radiator type setup, the alcohol will cool faster then water, which means a more efficient setup. but this is all theory based off of backyard science LOL Powered by vBulletin® Version 4.2.5 Copyright © 2026 vBulletin Solutions Inc. All rights reserved.

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