My buddys LS1 camaro went 10.6 on spray and a stock unopened motor. He ran as much as 300, and as little as 150. The 300 caught up to him at the YR1 experience two years ago, as seen on "Rides" He was the car that burned up. BTW, we learned a stock B18B integ motor on the same 2 kit 150 each will go 12.4 on 3 cyls!
Nitrous is like any other drug, a little will do you, but a little is never enough.