Barry_R Being an multi year engine builder for engine masters, One would think that you would have alot more knowledge of power band and curves than most anyone here. Tire spin with 400 HP in 4th or 5th gears at 5,800 rpms?? Come on. If I knew how to get a couple of my dyno sheets on here you could look at them and see the same issues as Brems motor in the 5,800 rpms with erson rockers. With stocker rockers and the same everything else, I pushed the motor to 6,200 rpms before valve float and a dip in power. BOTH DYNO SETUPS ARE IMPORTANT. I like to know how much power I am making at the flywheel and how much loss at the rear tires. We all guess about drivetrain drag being from 18-25%. It would be nice to know within 2-3%. Some changes can be made like changing clutches and flywheels, blueprinting transmissions to spin over easier. Differents between rotating the motor in short block before and after assembly. Less drag more power.
Oil sprayer on the bottom of pistons helps cool the piston, you can run higher compressions and stops detonation also. LS9 motor runs them and is also a drysump motor. There maybe a higher vacuum inside this motor than others without a drysump setup. Opinions due vary but the real world doesn't bench race. What works for some doesn't work for others, no answer as to why. Rick L.