Originally Posted By: gregoron
1. Would cooling down the engine and turbos prior to shutting it off allow less current draw from the batteries?
Yes. More charge time, too. Probably wouldn't cure the problem, but would certainly reduce it.
Originally Posted By: gregoron
Some turbocharged engine's owner's manuals say to let the car cool down a couple of minutes after a hard drive prior to shutting down engine anyways.
Well, yes. Wouldn't be easy or prudent for BMW to rely on that as a defense, though. Maybe for a super-niche sports car, but not for cars that are supposed to be reliable daily drivers for non-enthusiasts.
They could just make the car leave the engine on after the owner requests a shutdown if it's too hot. That sounds like its own kind of PR nightmare, though. I'm just imagining incredulous calls from owners demanding to know why their cars won't turn off, or worrying about pumping their garages full of exhaust.
Originally Posted By: gregoron
2. Would putting vents on the hood allow for the turbos to cool down faster?
Maybe, though it'd be hard to design in any case. It'd have to keep exhaust heat in on a cold start, let heat out when necessary, and keep rain and debris out at all times, all without looking hideous or out-of-place.
Originally Posted By: gregoron
Just theories open to opinions.
Hypotheses, not theories.
1. Would cooling down the engine and turbos prior to shutting it off allow less current draw from the batteries?
Yes. More charge time, too. Probably wouldn't cure the problem, but would certainly reduce it.
Originally Posted By: gregoron
Some turbocharged engine's owner's manuals say to let the car cool down a couple of minutes after a hard drive prior to shutting down engine anyways.
Well, yes. Wouldn't be easy or prudent for BMW to rely on that as a defense, though. Maybe for a super-niche sports car, but not for cars that are supposed to be reliable daily drivers for non-enthusiasts.
They could just make the car leave the engine on after the owner requests a shutdown if it's too hot. That sounds like its own kind of PR nightmare, though. I'm just imagining incredulous calls from owners demanding to know why their cars won't turn off, or worrying about pumping their garages full of exhaust.
Originally Posted By: gregoron
2. Would putting vents on the hood allow for the turbos to cool down faster?
Maybe, though it'd be hard to design in any case. It'd have to keep exhaust heat in on a cold start, let heat out when necessary, and keep rain and debris out at all times, all without looking hideous or out-of-place.
Originally Posted By: gregoron
Just theories open to opinions.
Hypotheses, not theories.