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      01-06-2011, 06:38 PM   #1
5erman
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A/C Disengage on acceleration

Hey guys quick question. does the A/C pump disengage when accelerating at certain rate or at max rate? Also the alternator disengages at all acceleration points?

So basically no downside to running A/C from a parasitic loss standpoint (obviously still overheats on a track) but just on the roads.

I always used to drive with a/c off as I felt it suck the power out of my engine so this would be good to know.

Wish it had an electric water pump-that would have been nice
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      01-06-2011, 10:22 PM   #2
MysticBlue
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It has variably controlled compressor and in effect is "disengaged" when needed, so no need to turn it off. The compressor only operates when needed. Mine is always on, even on the track.
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      01-07-2011, 12:05 AM   #3
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I think the alternator disengages at WOT above a certain RPM, but not the AC.
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      01-07-2011, 03:37 AM   #4
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Quote:
Originally Posted by UNNATRAL View Post
I think the alternator disengages at WOT above a certain RPM, but not the AC.
I don't think that the US market gets the "Efficient dynamics" system of disconnecting the alternator and AC at full throttle.
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      01-07-2011, 04:50 PM   #5
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Quote:
Originally Posted by SenorFunkyPants View Post
I don't think that the US market gets the "Efficient dynamics" system of disconnecting the alternator and AC at full throttle.
I know certain that the alternator disconnects-says it on the bmwusa site for the m3 but its the a/c that is not to be found
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