3 bolt .85 compared to 4 bolt?
I recently installed a 6766 ball bearing with the E cover and .85 exhaust housing, it will spool from 4100 RPM to 30 # in less than a half a second. Looking at the datalog from Wednesday at BG it picked up from 70-108 in 3.5 seconds. Unfortunately I had boost controller issues the rest of the event.