My Gt61 spools fully by 4k in 4th gear. Its hard to compare that with an auto though. In 1st gear I never really looked but I would still think its at full boost before 5k. The small turbos do seem to hit quickly though whenever then start it takes less time for them to get to full boil. You should see from a roll at 60 mph when full boost comes at what rpm in a higher gear.