The EGT's seem to be getting higher all the time. At WOT today (peak
power mixture)and 5500 feet, turned 5800 rpm for a TAS (best I can
calculate with data available)  of 190 mph and 9 gph. The rotor 2 EGT was
indicating 1826 degrees F. Oil temp was 178 and the water was 208.
Supposedly the high water temp would help efficiency, but hurt power. Am
not sure why the high water temp would hurt power?? The OAT was
indicating 81 degrees. The water pressure is running about 16 psig so do
not think I am close to boiling and Tracy does not think 212 would hurt
the engine. Anyone else got any ideas about 200+ water temps.

Bernie;

I don't recall; are you running 50/50 water/EG?  If so, with the pressure
cap you should still have pretty good margin at 210.  I've let the coolant
get up to about 225 for a short period and pressure is still below the cap
pressure of 21 psi.

But I would try to figure why the EGT is that high at max power mixture;
which would generally be about 100F rich of peak.  Seems about 150F higher
than it ought to be.

Other than that it sounds like you are doing really well.

Best,

Al