J performance

78 M20J at 11500' full throttle and about 30 LOP

Good news: I'm making book numbers, TAS was 152K, not bad.

Bad news: I have every speed mod: internal antennas, fairings, hinge&gap seals, 1 piece belly, low drag gear doors...according to marketing dept I should get an extra 16K, maybe it was because my plane was dirty :-)

Bottom line: Don't waste your $ on speed mods for J or later models (my plane came with them).