ignition advance curves

[Mike Dillon]

The optimum advance is just before the "onset of pre-detonation" in the 
optimum setup you would never have pre-detonation. In the Chev setup 
with knock sensors it will backoff the advance at the onset of 
pre-detonation.

Mike D 

> From: Robert Wilkinson <rw at ccwf.cc.utexas.edu>
> 
> Just trying to clear this up in my head.  Would an optimum ignition
> advance curve be at the onset of detonation throughout the entire advance
> curve, or only at WOT, or neither??  Seems like high advance (but not
> setting off knock sensor) during cruise conditions makes the engine run
> rough.
> 
> '86 Z28 350 DFI 6-speed
> Robert Wilkinson
> http://ccwf.cc.utexas.edu/~rw
> 
> 
> 
>