...  
  Overall it looks like I am running rich and or it is a thirsty engine.  More
power settings up to 29 inches and leaner runs etc. down lower might  reveal
faster speeds .
 
  I suspect that I could cruise at same speeds as before and really save on
fuel with the increased powerplant and propeller efficiencies.
 
  Please give me your thoughts.

Bob,

 

I Just came across some numbers Arnie gave me.  He has a blueprinted Lycon IO 360 with a MT 2 blade prop, ram air and Dual P-Mags.

 

@5500 MSL, 18C, 25.1 MAP, 2500 RPM, 195 KIAS, 218 KTAS, 12.8 GPH

@6500 MSL, 24.4 MAP, 2450 RPM, 190 KIAS, 215 KTAS, 12.3 GPH. 

 

I think his indicated is a bit fast (he thinks mine is a bit slow).

 

Before I did some speed mods, my Lycoming IO 320 with a Hartzell CS 2-blade prop and LSE ignition.

 

@9500 MSL, 14C, 22.1 MAP, 2510 RPM, 168 KIAS, 198 KTAS, 9.2 GPH.

@4500 MSL, 13C, 25 MAP, 2510 RPM, 183 KIAS, 195 KTAS, 10.8 GPH with

 

  CHT  EGT

1 360  1280

2 350  1300

3 360  1280

4 370  1290

 

Hope this helps with comparisons.  I am sure there are more if you search the LML.