Quote:
Originally Posted by automotivebreath
So the engineers at GM programmed the engine management system to
sense the increase in VE and engine load and respond accordingly to reduce
ignition advance. How does turbulence and burn rate factor into all of this?
Your turn.
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There's a third factor I totally forgot, that’s RPM. As RPM goes up , the time
for flame travel goes down, twice the RPM means 1/2 the amount of time for
combustion to complete.
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With increased throttle opening and increased rpm you now have increased airflow and turbulence this creates better air fuel mixture for better atomization so your burn rate speeds up, so now you don’t have to ignite the mixture as soon.