Jorgen- typically I'm flying in the 8-11k range at altitudes at 2550 rpm and around 13-14 gph. and vary between ROP and 10-20 lean of peak on the leanest cyl. depending on winds and temps. I've found that the factory 3 probe egt will show 40-50 lop when my GEM 610 shows less. The descriptive of the chart for the M20R that we are to use is attached. It shows 190 knots at 2500 rpm. Thus it would stand to reason that 2550 would give more speed even though this chart is ROP and 7500'. In addition since I fly alone 90% of the time I am well below the 3368 lbs which also increases speed. As you know the temp will also effect the TAS and I fly more in the cooler times of the year so that also helps. However I might suggest you check your rigging. It can make a huge differance. There should not be that much differance in our performances when compared to book. Currently I have 425 hrs TT on th A/C and had the rigging checked at time of purchase by an MSC. it was pretty much dead on although one gear door was tweaked. In the past I have picked up 6 knots or more with Mooney's that were out of rig. Just something to consider.
MOONEY M20R - OVATION 2 GX SECTION V PERFORMANCE
5 - - 26 AIRPLANE FLIGHT MANUAL ORIGINAL ISSUE - - 12-11-2007
M20R OVATION 2 GX - SPEED POWER VS ALTITUDE
EXAMPLE: PRESS ALT 7,500 FT OAT 10 C POWER 75% AIRSPEED 190 KTAS
SPEED, POWER VS. ALTITUDE GEAR UP , FLAPS UP , 3368 LBS