Yeah I checked them out--their "mildest" mechanical cam has a duration of 260, (haven't seen the overlap) which I would think gets into the range of not friendly at idle =) But that's why asking to see if people have some real-world experience with any of these cams. Thanks! Menko > You may try asking the folks at Clifford Research,6=8.They do nothing but 6cylinder engine work Doug B.