Quote:
Originally Posted by travislambert
Lean fuel conditions can cause detonation and potentially destroy an engine. By running the engine a little rich it helps guard against poor quality/low-octane gasoline and aftermarket mods such as cold-air-intakes. If GM knew nobody would ever mod there car and nobody would ever use poor quality gas, there wouldn't be a need for them to tune them to run rich.
(Many cold air intakes simply increase the diameter of the air tube going to the engine which throws off MAF reading. In other words, more air enters then engine than what is measured. This causes the engine to run leaner and therefore produce more power (at the increased risk of detonation)... This is where almost all of the power increase comes from... not the increase in airflow. There are a couple exceptions. Quality manufactures of aftermarket intakes, such as Rotofab, will provide a dyno graph which includes air to fuel ratio readings. If the A to F ratios are close to stock and horsepower is improved, this proves their intake actually works and isn't just a MAF hack.)
|
Well said, thank you for not throwing us in with the rest of the pack!
Michael