Sorry I'm slow in responding Ed.  Us retired guyes are too busy.  I have a Catto 76X88 and static has been 5500 rpm.  I did fly the plane for over 1 hour Monday and noted the following info.  At 3500 feet ASL , 75 deg F. OAT - 21.3 in MP, 5330 rpm , 205 deg F oil, 62 psi oil press., 188 deg F. water.  I hope to get more time on the plane later this week.  My exhaust is probably too restrictive.  When flying alongside an RV 7A with a 180 Lyc.  noone on the ground could hear my plane as we flew over at 2500 feet.  The Lyc was much louder.  I believe the Renesis is quiet by design!