I am running a 572, intercooled, 10-71, 8.5 to1, at around 6 pounds boost, with two dominators with boost referenced power valves, locked out dist at 32 degrees.
The boat runs great, except if I am pulling a wakeboarder or tuber at low speed. It reallly runs fat between 2000 and 2800 rpm. So much so that when I stop and restart, after running in this zone, there is a four foot ring of black soot in the water. The motor is sputtering at this rpm. If you throttle thru it no problem, only a sustained slow pull at this rpm does it load up. To the point that it appears I washed out a cylinder wall and am now getting more blow by.
Do I keep the power valves and adjust them to come on a little latter or junk the entire boost referenced system and eliminate the power vavles?