Greg Taylor wrote: > Hey guys, I went back and re-read the paragraphs on this. 16:1 > pistons are installed and the cam makes the compression cycle on the > intake act like 8:1. ... http://en.wikipedia.org/wiki/Miller_cycle AHA! OK, that makes more sense! So the short answer is, the intake valve stays open until back-flow occurs -- which is very late -- 20% into the start of compression -- IF! there's a big-a** supercharger pushing air in. WIthout the compressor it would be reversion. With, reversion is delayed. _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list