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I don't have the engineering background that either of you two do, but Walter's assertion that the HP is the same does not match my practical experience. With American Aviation intercoolers on my 73 P337, if I used the stock MP/RPM settings, I would get higher fuel flows and faster airspeeds, indicating to me that the engine was putting out more horsepower. My mechanic gave me the same advice as Kyle's RTC instructor: reduce the MP until you get the correct fuel flow for the percentage of power that you are trying for. In my case, this was 2" lower. When I did that, I got book airspeeds (matched to book fuel flows). If it was only one engine that did this, I would think it could be guage error, but both engines were perfectly matched in this respect.
Kevin
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04-04-05, 12:10 PM
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