Just checked a data log and it was less than 60 rpm over the set. on both shifts. This was a NA run.
With the stock tach it looks to be higher like you said xlrviii. I see much more to it than I knew.
man, dont get me wrong.. as much as I know, there is much much more that I dont know..And it seems the more I learn, the more I learn that I dont know...the learning process never seems to end.