Was recommended that launch RPM should be between 1600 to 1800, Hubby actually brought it as high as 2000. Flash over was expected to be around 3800, I honestly don't know where it occurred. I launch off of idle without a difference in our 60 fts though. Another puzzle/concern...
It didn't seem to have any problem with aceleration, it felt good. 60 fts were slow though, last one was 2.24. It's snapping through the burn outs better than it ever has too.