Here is a quote from another post of mine in a thread called Confused on EGR
"I finally got off my butt and did some research in my old textbooks. Here is the answer which was eluding me. The following is from Introduction to Internal Combustion Engines by Richard Stone.
“The part-load fuel consumption is reduced because EGR leads to a reduction in the throttling loss-to admit a given quantity of air the throttle has to be more fully open, thereby reducing the pressure drop (and the loss of work) across the throttle.”(p.155)
I still wonder if this increase in engine efficiency will translate to an increase in vehicle efficiency. Has anyone noticed a change in fuel consumption (better or worse) when switching from EGR to without, or vice-versa?
As mentioned by others, another advantage of EGR is that you can run more ignition timing. In fact fuel economy is again improved if the ignition timing is optimized for power on an EGR vehicle, when compared to non-EGR. I would assume that Ford did a fairly decent job with the spark advance. "
You will not increase performance by running w/out the EGR. You will only emit more NOX and burn more fuel. Just want to make sure that you guys know the consequences of removing the EGR.