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

 I once pulled  10 consecutive sets of data from a refinery.

 Avgas ran all the way from about   5.7 lbs/gal up to about 5.9x lbs/gal.  I
routinely use  5.82 lbs/gal as it was the average of that data set.

 The peak magnitude of the EGTs don’t change a lot with the last couple of
inches of MP.

 This doesn’t have to be down to the last degree or even 10 or 20 or 30
degrees.

"""
 Arrrrgh................  I don't know what the HP is - It has been my
question for years.  Is there a conversion of gallons to pounds based on
temperature?  Ok, if it is 160 HP (even at 1000 feet) at 15.4 Gallons per hr.
then, at the inaccurate 6 pounds per gallon, that BSFC is .5775.  Maybe I
should fly at some LOP setting, get the fuel flow and back calculate the HP
from the fuel flow.
"""