Quote:
Originally Posted by Ando140
I think you may have mis-understood me in the first part. I am a commercial pilot and I am very familiar with manifold pressures. As altitude increases the amount of fuel (as vapor) that can be supported in the air decreases. That's why the mixture must be leaned, so less fuel is injected into the cylinders for any given rpm vs the same rpm at lower altitudes. Unless these engines work differently than piston aircraft engines... and I don't know why they would (other than things being electronically controlled).
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I don't claim to know anything about the carburetion or injection of piston/propeller aircraft engines, other than the 2-cycle engine of my old ultralight, but I have driven lots of fuel injected miles at high altitude in my Tundra and Sequoia.