"Mea Culpa!" I was relying on an obviously erroneous Wikipedia reference for that bit of info, and it didn't sound exactly right when I wrote it. Dad said his plane could take off with a P-40, and outclimb it to 10,000 feet at full military power. There was a "war emergency" setting for the turbos that boosted the power considerably, but they were cautioned not to use that setting unless it was absolutely necessary!
Jerry