Here is more data.
I have redone my pitot/static system. I switched over to using the sweet connectors and red piping that you can get from Stein. Ground testing is less then 100 ft in one minute with alt at 2000 ft. The airspeed dropped only 2 kts in one minute at 160 kts.
Now for the flight data ( hope the formating work in the post)
add periods in the hope that the columns would work)
Presure Alt...MP.... RPM....OAT gph peek bearing GS ASI
8030...........22.....2690....67 10.7 100 141........169 144
8030...........22.....2690....67 10.7 100 44.........166 145
8030...........22.....2690....67 10.7 100 283........163 144
8030..........22.2....2590....67 10.5 100 282........161 142
8030..........22.2....2500....67 10.2 100 281........160 141
8030...........22.1...2500....67 7.6 -13 281........155 136
8030...........22.1...2500....67 7.5 -26 172........158 136
8030...........22.1...2500....67 7.5 -26 51..........156 137
8030...........22.2...2400....67 7.3 -34 251........154 134
8030...........22.3...2300....67 7.3 -44 191........156 134
8030........... 22.....2210....67 7.5 .... 190........156 132
8030...........21......2090....67 7.7 .... 161........146 127
8030...........20......2000....67 6.8 .... 161........139 120
8030...........18.9...1900....67 6.2 .... 161........134 114
8030...........17.9...1790....67 5.6 .... 161.........127 108
This worked out to 166 kts at 2700 rpm and 10.7 gph.
Or
156 kts at 2500 rpm at 7.5 gph.
Kent