Quote:
Originally Posted by mikeyjd
In theory I think it would make more sense to run the a/c during heavy acceleration so as to get your alternator charging during peak bsfc. I could be wrong though.
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Other way around. There is an abundance of engine power, but not enough times to use it. Better to run accessories when it's lightly loaded. If you run the AC when the engine is running very slowly at low load, the engine might be in a poor BSFC area but the amount that you increase the BSFC is huge because you're putting load on the engine when it has very little load.
The exception would be if the engine speed is increased significantly to run the accessories, but that's what "pulse and glide" is for (as in, cycle the AC on and off, preferably on when braking).