Tuggs and Maxam,
Thanks for the replies. I'm fairly certain now that the overheating and sagging was due to ground running too long.
Others with this plane are not experiencing overheating with no mods to the cowl.
Temps should be OK with the 7 louver vents around the cowl. Each opening for a vent is 2 1/2" x 2 1/8".
This is in addition to the exit area that surrounds the back of the cowl.
The louvers do an excellent job of extracting heat.
The ignition module is inside the fuse away from engine heat.
The carb is drawing air within the fuse. I have a velocity stack on the carb.
I will try rotating the prop. Will reduce voltage to ignition to 4.8v the next time I have down for service.
Could the mid range missing may be a carb transition issue between the L and H jets???????
Regards - J Tab