Does anyone know what is the HP loss of an AC Pump in operation?
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
Hired a Daewoo once on holiday in Greece that wouldn't go up hills if the AC was on
I did hear that above about 40 to 50, opening the windows loses more power by increased drag than using the AC.
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
Sounds about right!
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
On a Golf 100bhp TDI it's 7-10mpg of a difference.
42-45mpg becomes 52mpg.