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

 
 The term  Max Brake Torque - - (for any arbitrary MP and RPM)  is normally a
function of only two variables,  timing and F/A ratio.
 
 You can get off MBT timing by 1 or 2% and create conditions that will
probably double, triple, (or more)  the operating life of the engine operating
at very high power settings.
 
 At lower power settings,  it doesn't make much difference.
 
 Regards,  George
 
 "It is not how hard you run the engine, rather, it is how  you run the engine
hard - - that matters most."
 
"""
 <<Max Brake Torque >>
 
 Back in Detroit (also in the SAE standards) MBT meant "Minimum advance for
 Best Torque."  A good way to approach the subject, as George implied, is to
 set the advance for some torque loss, say 1%.  Then it would be "Min adv.
 for a 1% torque loss".  That would probably be safe for all engines not
 octane-limited.
"""