Quote:
Originally Posted by JoeFromPA
Because you aren't normalizing for ambient air pressure in your thinking. The dynamic cylinder pressure under boost is also a reflection of ambient air pressure's. Thus the turbo can boost higher, but cylinder pressure remains the same, as altitude increases.
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No, I get that. But I didn't think there was a difference between cylinder pressure and turbo pressure. I thought 18 psi boost meant that 18 psi boosted air is loaded into the cylinders. If not, where is the 18 psi pressure?