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Originally Posted by Mr. Kite
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Originally Posted by natchris
The science hasn't changed. Less air, less power. Feel free to Google if you need proof.
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I did google it. If I had found anything I would not have wasted my time asking you for your proof. Obviously, you have none.
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What, pray tell, did you feed Google? I tried "engine power altitude" and got back 300k hits, with this calculator as the first --
http://wahiduddin.net/calc/calc_hp_dp.htm which also corrects for temperature and humidity. 3% reduction in power per 1000 feet of altitude is a pretty standard approximation.
I think carburetted engines of old lost power due to both the thinning air as well as the fuel/air mixture going wrong, whereas modern automotive FI does a better job of compensating the mixture with altitude. They still lose power due to altitude.
Benton 3may08