Quote:
Originally Posted by Diesel911
The percentage of Oxygen at any altitude and temp (in the Air) is always the same.
It is the partial pressure of Oxygen and the other gasses in the Air that is different at different altitudes and temps.
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That is what I think... was wondering if everyone was going to let Brian get away with that ' yes '... LOL
For gas engines when the air temperature is lower more can fit into the same bore .... thus more power is available since the ratio of air to fuel is assumed to be the same...you are both able to and do burn more fuel per revolution.
On our diesels... unless one has a ' mass sensor' to change the amount of fuel ifuel injected... I do not believe more power is made at lower ambient air temperature... I do think our machines may have a pressure sensor which will do some compensating for altitude... but do not think that is related directly to temperature ( and thus density ) of the air.
I am referring to NA engines.... I do not know about the others....