Quote Originally Posted by Mojo
1 and 2 nd problem can easily be solved by gear ratios, High RPM and low torque can be converted to a high torque low rpm through gears.
true but the RPM range will still be very wide.

And if you do use gear reducers, won't it greatly decrease the efficiency of the system and increase it's need for maintenance as well? Gear reducers will require lubricating oil which would require periodic maintenance as well. Then there will be a problem of packaging of the entire system compactly under the hood with weight comparible (or less) than a standard a/c compressor system.

And the last thing... cost of the system might be 3 to 4 times more than a standard a/c compressor. I'd rather have that added cost into producing more engine power.