Hey Hollywood,

If you set up your engine and cowling per the manual and the way that jet22b did you will not have to worry about overheating the 91. One thing that most guys forget about is allowing the heat to escape the engine compartment alias the cowl. The way that the cowl is set up on this bird with all of the open space in the rear, overheating will not be a concern. I have a Hangar 9 P51 with an OS 91 in it and have never had the engine run hot. Of course I never run her lean.

jet22b: Read the review by Mike B and I think that the CG should be four inches from the leading edge on either side of the joint covers. If I read your reply correctly and you go 5.5 inches from the leading edge you are possibly going to be very nose heavy.

Later,
maddieone