Timing Rule of thumb

[Ciciora Steve]

  Just read a rule of thumb in hot rod mag.  Something like "Spark
susceptibility to knock increases 1 deg. for every 10 deg. increase in coolent
temp."  What this means to me if I ever get my ignition controller finished is
I'll retard my timing 1 deg. for every 10 deg. the coolent temp. is over an
(adjustable) setpoint.  This setpoint will be the normal coolent operating
temperature of my car.  Sound good to you guys?
- Steven Ciciora