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jurhip jurhip is offline
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Join Date: Jul 2002
Location: SoCal
Posts: 643
Originally Posted by turboteener View Post
Wouldn't the airflow (mass) be lower at elevation though due to the lower atmospheric pressure feeding the turbo? Yes a turbo will generate the same level of boost at elevation as it will at sea level, it may take more rpm(turbo) for the turbo to reach that level. Your increased compressor outlet temps would come from the compressor working harder on less air, right?
Yes, you are correct. Temperature rise will be based on differential pressure (work done to the air). And the turbo will need to spin a little faster, so your lag will be exaggerated. However, a higher pressure boost spring will not change the compressor curves. Max pressure will be higher, but the time to max will be the same.

At very high elevations, the compressor wheel design would need to be modified.
Old 03-09-2008, 11:09 AM
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