Quote:
Originally Posted by Old300D
EGR valves on gassers won't hurt performance as the recirculation is only done under partial throttle. But fuel efficiency may indeed suffer a small amount.
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The EGR hurts "performance" in the sense that it detracts from throttle feel. It's like losing the power of 1/2 cylinder on a V8. Disconnecting it will give you a "noticeable" feeling of additional performance for about two minutes until you accept that new level as the standard.