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      12-16-2013, 01:48 PM   #132
solstice
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Drives: 2015 M3 6MT
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Can someone explain to me the notion that the turbos will work at +18 psi at high altitude and several psi lower at sea level? I get the physics with thinner air and the need for higher boost to make the advertised hp what I don't get is why would BMW not run a psi that the engine obviously has been designed and tested to handle at all altitudes? Yes it means that it would make more power than advertised at sea level but so what? It's not like that is a bad thing, why program the ECU to always generate the same hp at all altitudes instead of the same psi, doesn't make sense to me?
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