[Mgs] Overdrive Numbers

[WSpohn4 at aol.com]

And just because you have knock sensing doesn't mean that the car will  
automatically advance until it hears knock. It will more likely only advance  until 
a preset (by the ECM) limit even if further advance over that would have  
produced more power.  To take advantage of further advance would require a  
different chip or reflashing the PROM.
 
Lots of guys with modern management systems don't grasp that  distinction.
 
Bill
 
In a message dated 14/01/2008 1:48:18 A.M. Pacific Standard Time,  
paul.hunt1 at blueyonder.co.uk writes:

Many  modern high-performance cars use 
knock-sensing to continually fine-tune  the timing and they also get better 
performance out of higher octane  fuels, but automatically.  Others running 
on fixed maps will not get  any benefit.