Bad for A/C?

[Mard]

Is it bad on the a/c compressor, when the a/c is on, to accelerate full throttle from a standstill or from slow speeds? I was just thinking about the hit to compressor and high rpms......probably nothing to worry about...right:confused:.

[JMan]

Although high RPM's are hard on things, your compressor shuts off when nearing full throttle. Of course this doesn't address the fact that it snaps back on at high RPM when you get out of it. It's an age-old dilemma! If you know you're going to be doggin' it, heck yeah, shut it off!

J

[ckadiddle]

It's fine if your A/C is covered under your ESP extended warranty.:)

[Bradley G]

I don't think you can hurt anything by doing that, or my compressor would be toast! :coolman:

[ScottB]

To get it to snap to a high RPM the car would have to downshift. To downshift you have to open the throttle. Opening the throttle cuts off the AC and it shouldn't come back on in open loop.

Try a dyno pull with the AC on. It is very interesting.

[JACook]

Older reciprocating compressors don't like the high-RPM clutch dump so much, but most cars built since
the early '80s use an axial 'swash plate' design. The pistons in these are double-ended, most commonly
with 3 cylinders either side of the rotating swash plate. There is no connecting rod. The pistons are very
lightweight, and the stroke is only about 3/4" or so. These compressors can easily take the hit, though
they still don't like to be over-rev'ed.

The compressor on the MM is an even better scroll design. These use two scrolls, one inside the other.
One is fixed, while the other moves in an orbital fashion. Think of an orbital sander, and you're close.
These have even less inertia than a swash-plate compressor, and can tolerate higher RPMs.

Which is all just a long-winded way to say don't worry about it. :)

[Mard]

Older reciprocating compressors don't like the high-RPM clutch dump so much, but most cars built since
the early '80s use an axial 'swash plate' design. The pistons in these are double-ended, most commonly
with 3 cylinders either side of the rotating swash plate. There is no connecting rod. The pistons are very
lightweight, and the stroke is only about 3/4" or so. These compressors can easily take the hit, though
they still don't like to be over-rev'ed.

The compressor on the MM is an even better scroll design. These use two scrolls, one inside the other.
One is fixed, while the other moves in an orbital fashion. Think of an orbital sander, and you're close.
These have even less inertia than a swash-plate compressor, and can tolerate higher RPMs.

Which is all just a long-winded way to say don't worry about it. :)

Wow....you must build a/c compressors during your free time:D. Thanks for putting my mind at ease....you folks are great!

[ScottB]

The compressor on the MM is an even better scroll design.

Cool! I didn't realize ours were scrolls!

Anyone got a junk one that still turns that they want to donate to a science project?