Art -

They teach, in the APS Seminar, Wide Open Throttle (WOT) all the time and vary the mixture in the LOP range and rpm for speed. They are having a live seminar in early May in Ada, OK if anyone is interested. I highly recommend it. IMHO, it is the most cost-effective insurance one can have with respect to the care and running of your engine. You can also take it on line. I have not done that one. George, Walter and John - all have taken IO & TSIO 550's to factory recommended overhaul times and sometimes beyond; with little or no cylinder problems. I may not be completely accurate on this last statement, but close. Another point is that the turbo temperature is a key indicator for setting and running LOP. I did not have a turbo, so I did not pay close attention to this part of the seminar.

My apologies to Walter, George and John if I have mis-stated something here. Just trying to get folks to your seminar. :-))

John Schroeder




On Sat, 14 Mar 2009 07:32:47 -0400, Art Bertolina <artbertolina@earthlink.net> wrote:

Re: [LML] LOP vs ROP Climb: Time and Fuel Burn (LIVP)would like to hear what George or Walter could add to
this conversation. It was my understanding that higher RPM
is better for the engine, as long as the prop is not driving
engine
Art
  ----- Original Message -----
  From: Colyn Case at earthlink
  To: lml@lancaironline.net
  Sent: Thursday, March 12, 2009 4:30 PM
  Subject: [LML] Re: LOP vs ROP Climb: Time and Fuel Burn (LIVP)


  Chuck said,
  So, if you are going to reduce power, between MP or RPM, it is better to reduce MP since higher RPM keeps PP lower, at least that was their general conclusion, supported by engine shop experience.

  I agree at high power settings for the reasons cited,  but once you get down to cruise power settings, if you are going to reduce power further, reducing rpm removes some friction component while reducing mp does not.  therefore you should get better mileage by lowering rpm.

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