Originally Posted by Grum.man
232 HP for an IO-550N. Fuel flow at 75% best econ is 88-90 lbs per hour. TQ isn't specified but calculated should be about 488 lb-ft
The IO-550G is better but is only 210 HP.
Impressive numbers, nearing diesel fuel burns. My numbers in the first post are at full rich (I think). I doubt that any leaning was done during the dyno runs.