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does wiki stand correct:
In diesel enginesBy feeding the lower oxygen exhaust gas into the intake, diesel EGR systems lower combustion temperature, reducing emissions of NOx. This makes combustion less efficient, compromising economy and power. The normally "dry" intake system of a diesel engine is now subject to fouling from soot, unburned fuel and oil in the EGR bleed, which has little effect on airflow but can cause problems with components such as swirl flaps, where fitted. Diesel EGR also increases soot production, though this was masked in the US by the simultaneous introduction of diesel particulate filters.[6] EGR systems can also add abrasive contaminants and increase engine oil acidity, which in turn can reduce engine longevity.[7]
Though engine manufacturers have refused to release details of the effect of EGR on fuel economy, the EPA regulations of 2002 that led to the introduction of cooled EGR were associated with a 3% drop in engine efficiency, bucking a trend of a .5% a year increase.[8]
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ok, not to ruffle any feathers but, an EGR is used for emmision control right? and that only matters if you believe emmisions are a problem, which to some extent i can understand but it's not something I give a rat's @ss about. global warming and that whole nonsense doesn't matter much to me (since it's about the BIGGEST scam man has ever undergone-soley to bring about a carbon tax...) just research solar activity/history.... so an EGR valve is good for lower engine temps, lower emmisions, and it makes the tree huggers happy right? AND less power? so it's not really needed is it?
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