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Originally Posted by Beav
If one wanted to go to the trouble they could retard the exhaust cams one tooth and not have to worry about an EGR or NOx. Of course the perf and mpg would take a little hit...
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My interest would be centred on firstly advancing the inlet cam and as a secondary experiment, additionally retarding the exhaust. Both would increase the overlap at TDC, but accepted, would reduce same at BDC. The idea being to gain information relative to grinding special cams to move power output up the rev range. Percentage wise the adjustment at TDC, is greater than at BDC and the results could be interpreted accordingly.