Charlie,

Full throttle was used with the mixture set to about 60 degrees lean of peak EGT.  Running rich of peak gives significantly more power at the expense of higher fuel consumption:  higher speed but smaller mpg.

The performance of the two blade Performance Propellers and Aymar Demuth wood props were similar to the 3 blade Warp Drive prop.  I didn't like the fore/aft flutter of the wood prop at low power settings which may have contributed to the RD1A front bearing coming loose in the housing and slamming fore and aft to the point where aluminum from the casting and front plate were welded to the sides of the outer bearing race leaving pits in the casting and plate.  The bearing never did spin in the housing.  This may not have happened if more crush had been applied to the bearing by the front plate.  A 0.010" thick brass shim behind the bearing and a new front plate seem to have held up so far.

The two AC cores that were located behind the stock cooling inlets have been removed.  The radiator in the cowl is in the location under the PSRU where the oil to air heat exchanger was originally located.  This minimized the weight change from adding the scoop system and the CG is still fine.  The intent was to eliminate all heat exchangers from inside the cowl and this may be possible with the two cores in the scoop.  Warm weather testing will tell, but that is months or hundreds of miles away.  There sure is a lot of empty space in the forward cowling area now. 

Steve