l0rd
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| posted on 21/3/09 at 11:20 AM |
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Anybody Know?
Does anyone know what is the HP loss of an AC Pump in operation?
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eccsmk
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| posted on 21/3/09 at 11:41 AM |
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IIRC, the average AC unit in a car takes 10-12hp off the engine. So if you have a 100hp car, it makes a big difference. If you have a 200hp car, you
barely notice. At 300hp, well, it's a joke. Keep in mind that there is also a torque issue. In my old 147hp Jeep wrangler, it didn't make
much difference in the AC was on or if you were towing a boat; it just went. Never faster then 120, but it went.
So, having he AC on in a 90hp super compact.....not the best for hills.
taken from here
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rusty nuts
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| posted on 21/3/09 at 01:44 PM |
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Hired a Daewoo once on holiday in Greece that wouldn't go up hills if the AC was on
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SteveWalker
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| posted on 21/3/09 at 01:47 PM |
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I did hear that above about 40 to 50, opening the windows loses more power by increased drag than using the AC.
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David Jenkins
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| posted on 21/3/09 at 02:13 PM |
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quote:
Originally posted by rusty nuts
Hired a Daewoo once on holiday in Greece that wouldn't go up hills if the AC was on
When in my wife's Matiz, we call turning off the A/C "turbo boost"!
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rusty nuts
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| posted on 21/3/09 at 03:10 PM |
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Sounds about right!
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daviep
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| posted on 21/3/09 at 05:03 PM |
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I don't know the answer but I'd bet my bottom dollar it's not 10-12hp.
I just checked the air con unit for my living room and it is rated at 840W (1.1hp), now my living room is a good bit bigger than any car I've
been in so I can't see how it would take 10hp to cool a car, plus a house AC unit also has to run a cooling fan in addition to a compressor.
Also I think the poly vee belts that drive most AC compressors would struggle to transmit 10hp but I've not bothered checking this.
I'm guessing less than 2hp
Cheers
Davie
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zilspeed
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| posted on 21/3/09 at 05:05 PM |
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On a Golf 100bhp TDI it's 7-10mpg of a difference.
42-45mpg becomes 52mpg.
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