Jeff

What piston skirt to wall clearance and ring end gaps did you use for the Wiseco's? Are these cast or forged? High silicon?
Not experienced with Wiseco's, don't have a dino and do not hog the launch ramp. The variable loading to push the rings to the wall is the important part and some cool down. Pretty much similar process Mike notes except I do out in the water. When I break in new Merc cast pistons and rings (with proper clearances) on the race engines with a used bored block (or just new rings on seasoned pistons on used block), very little idle just to verify cooling, leaks, etc, ignition retarded some, extra non syn oil, plane over quick watch revs doing this then do the variable rpm loading to mid rpm with short blasts to full revs back to mid, do several cycles for 10 min or so. Come in for a cool down. Then repeat several times, then I do full revs. Never had a failure and engine works well, even compression in cylinders.
Have fun
Pete