Quote:
Originally Posted by cRiPpLe_rOoStEr
What do you expect from an external EGR on this engine? Are you considering a cooled or a warm EGR?
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It has hot external EGR already built in, it just looks underutilized to me, mostly relying on cam overlap to get internal EGR. Cam retard = less internal EGR and also less volumetric efficiency, add external EGR adds back the charge dilution with less pumping loss, and also adds timing to make up for the lower dynamic compression ratio and charge density.
The valve isn't very big, but at low load it can supply much more EGR than it does right now.