Quote:
Originally Posted by bur****jp
It is more a matter of chemistry and thermodynamics than mechanics.
Most of the reason people go richer is to compensate for knock and then try to edge out more power. The power you make in that manner is fragile at best, and catastrophic at worst. Cars tuned this way are temperamental and unpredictable.
In this case conservative tuning isn't running richer, it's running MBT and the appropriate ignition timing to suit.
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This is not always the case there are afr ratios that will produce the best power theoretically but on a boosted engine the cylinder needs to be cooled somehow. And timing and fuel determine how hot the cylinder will run and how high pressures will be so don't misinform people about afr's without looking at the specific setup the car is running.
Best advice here ask your tuner.