Posted for Walter Atkinson <walter@advancedpilot.com>:

 Craig:
 
 You should be able to add MP to about 31.5 - 32" with great success.  That
would give you about 17.5 - 18 gph in GoFAST mode and still be adequately LOP.
 Above that MP, LOP, we have noticed that soem engines simply won;t run
smothly even with exceellent F:A ratios.  We have not identified the cause.
 
 Walter