P337

[JimC]

Don't forget your Mirage had 5.5 psi differential, and the 337 has 3.35. That means much more fatigue buildup per hour The Mirage runs an 8,000 ft cabin at FL250 and the 337 runs a 9,200 ft cabin at FL190. You'll also get less of a tailwind 6,000 ft lower.

Published max climb at FL200 for a T337G is 870 fpm at gross. You're going to have pretty hot engines trying to get that rate on anything warmer than an ISA day.