Ohhhhhh Dear!!!
Sorry folks I have to retract that Chocky Frog offer........can't afford that many frogs
For what could have been a good article, and some of it was, it has been trashed.
So NIK320......be careful of all the good info out there....including mine
Aerozep, yes the PPP does move closer to TDC but at the typical RPM range 2100-2500 used in cruise power settings this is not an issue unless a minimum RPM is specified for your engine.
Setting 1700 maybe and a very high MP and a 50ROP mixture might get you pounding the piston right at TDC (you could work it out based on combustion time and ignition advance, but I am not keen to do that right now). That would be something to be concerned about.