Posted for "George Braly" <gwbraly@gami.com>:

 Scott,
 
 
 Could you gather a little data for me?
  
 
 I know that the big bore TCM engines - - if set up properly LOP at high
 power at altitude,  will always operate nicely with no mixture
 adjustment after a long descent.
 
 
 But I don't have any recent experience (I owned a Mooney for 1500 hours
 - - years ago <g>) with the  fuel system on the Lycoming engines.  What
 happens to your engine if you have it well LOP at altitude and then
 descend without adjusting the mixture and power up after a 10 or 15K
 foot descent ???
 
 
 Regards,  George