Posted for "Frederick Moreno" <fredmoreno@optusnet.com.au>:

 Rick:
 
 Thanks for clarifying all the "xxx-ignition" types.  I know there are
 many, and not all are known by me.  Not even close. And then there is
 cycle to cycle variability and other additional complexities.  This
 combustion stuff is complicated.
 
 I would love to attend a combustion seminar.  Maybe next time they are
 in Western Australia.
 
 I agree: cool is good when making lots of horsepower.  A constant flow
 of gin and tonics over the cylinder heads can probably allow an
 additional 5 inches of manifold pressure, depending on the gin to tonic
 ratio. I have a curve somewhere in one of my books, GPH of anti
 detonation fluid (gin and tonic that is) vs. inches of mercury....
 
Fred