"Personally it has much more to do with air density than temps. You could live 5k ft above sea level in 50 degree weather and i can be on florida at sea level at 90 degree weather and my car would still make more power thsn yours. It mostly comes down to how much air can be forced in or is available not SO much on how cold it is...."
Well here we go.
Flying, at 10k feet, beyond that point you had better have a way to lean out the mixture of even a carburated engine so as not to burn rich....and -LOSE POWER-.
Air is quite a bit less dense at that altitude. Surpasses the temp dependent thing at the -SAME- density altitude.
Why don't you study why a helium balloon sinks when the room air gets warm???
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