Re: What about volumetric loss in blowers and fans at high altitudes
Harold,
An internal combustion engine will experience a change in its fuel/air ratio with altitude change. Fuel injection mapping can adjust and change to compensate. A carburated or natural aspiration engine will require jetting changes to compensate. These jets would need to be changed along with major altitude changes for optimal performance so if this is a moving vehicle that may not be possible. A "happy medium" needs to be reached depending on the altitude conditions most spent at. You are also on the right track with the fans. You could rig up a really easy fun test on this. Here's a link of info to get you stared on blowers.
Solving High Altitude Cooling Problems - Application Note
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