Tell me I'm an idiot, but why wouldn't this work.

Discuss the RB20, RB25 and RB26 series engines.
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IowaRB240SX
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Joined: Tue Jul 05, 2005 3:03 pm
Car: 1991 Nissan 240sx

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Ok, your air conditioning blows warm air past a coil that is super cooled by the compressor, making your car or house sometimes way too cold. Why couldn't you build a box to put that coil in and hook it to your ac compressor and run your turbo piping through it like you would an intercooler? I think it would flow better and cool way better seeing you are using a chilled coil rather than just one cooled by outside air. Which sometimes can be over 100 deg. The coil could can get to below freezing anytime you have the car running.


Nowhere
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Joined: Wed Aug 03, 2005 1:56 pm
Car: Suzuki x-90, samurai

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The power required to do that would be MORE than the power gained by the colder/more dense air.


ehacker01
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Joined: Fri Feb 04, 2005 5:01 pm
Car: 1995 240sx
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Nowhere wrote:The power required to do that would be MORE than the power gained by the colder/more dense air.
exactly. that AC compressors soaks up a ton of power. Intercooler spray bar would be better.

T4 RB25det
Posts: 151
Joined: Fri Jul 22, 2005 11:47 am
Car: 1995 240

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i see what you are saying and it is true that the amout of power the ac compressor would drain off the motor would be more than you would make up with the cold air. but you would get less risk of detonation i guess.

one way to do it would be somewhoat like the intercooler spray by doing it at idle to cool down the intercooler before a hard run. like in the staging lanes at the drag stirp.

the work required to do that would be more than what its worth. it would be cheaper to do an intercooler spray bar

Slo_240sx
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Car: Mean Green LS1 S13. Caged and Backhalfed.

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Well here is your first problem. A/C requires a condenser in the front which is very very hot. More than likely if you have an RB the only spot you have to make a box is in the front so then you just canceled out your box you made. Second no one makes a coil large enough to cool all of that air, and you would never air seal a boosted box and still manage to have a evaporator core in it. Third, There are too many components to an A/C system for it to be worth while. Compressor, Evap core, hard lines, condensor, orifice tube or H block, some type of regulator.... just too much. And fourth, like everyone says, A/C drains power. I see where you are coming from the basic theory is good, Cool air = Power, but for it to be cost worthy and functional you are just spinning your wheels.-Alex

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Carl H
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Car: 1995 Nissan 240SX SE RB30DET

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heh, while impractical it would be cool to tell your passengers that you need to 'turn on your chargecooler' .i know im such a ricer.

'90_240sx_Lover
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Car: 1990 240sx w/ custom exhaust

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I'm not sure if anyone else noticed this, but with my 240 (completely stock except exhaust) i can feel the a/c kick on and off while i'm driving. Cruising at 55 i can feel it turn on, then i get a little kick of power when i click it off. I try not to use it for mpg and waste of power.

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Wulfgang
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Of course you can feel it kick on. Did you know that some luxury cars have as much as 5 tons of cooling? (Picture the A/C unit on a 3000 sq. ft. house in south Texas.) The unit on the 240 is not quite that big, but it still cranks out the cold. You use several hp when you turn the A/C on. And when you're cruising on the highway, you're only using about 50-75 hp anyway, so you can really feel the hit when the A/C clutch engages.

gawdzilla
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the new lightning is rumored to have an intake air cooling system which "charges" off the AC system that you can occasionally use to supercool the intake

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rbsileighty
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Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Just run a water to air intercooler instead... with a reservoir, small heat exhanger and pump to keep the water cool... could really shorten IC piping length... most likely get similar exchange temps as those coming from your A/C system if you ran ice water (of course this would be for short durations) without the drag on the motor

http://www.pwr-performance.com/intercooler.htm


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IowaRB240SX
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Joined: Tue Jul 05, 2005 3:03 pm
Car: 1991 Nissan 240sx

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Thnks. That sums it up. That idea is out the door.


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