"Shock cooling"

[JeffAxel]

big difference between the drag from the gear doors on a P210 and the doors on a P337. I probably wouldn't take the doors off a 210, but would consider it on a P337 if you fly in marginal situations a lot. That said, if you don't cycle the gear until you have altitude to loose, it shouldn't be a problem either way. The plane will climb okay (200fpm or so) on one engine with the gear down and the doors closed.