Quote:
Originally Posted by ewicky
FYI our compressors are clutchless style that don't create any noticeable sound/vibration/pull when engaging. They are always engaged, 24x7. The compressor vanes just vary to adjust the compression stroke of the pump from 2% for aircon off, all the way up to 100% for max AC. The HVAC system can command any point in that range. They don't pulse on and off like traditional clutch types.
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I agree that my e90 doesn’t have that shuddering engagement moment that I know from older vehicles. But I swear you can hear/feel the load on the engine. I have a long, steep hill to drive up about 1 mile into my commute and the car definitely sounds different on the days I don’t have the ac on.
I have performed the intake vapor filter delete and I have a PE so my car is fairly communicative.