Boost does not cause increased heat, fuel does. That being said, Eddy, if you are not intercooled, there is very little point in boost levels above 15 psi or so. Above that point, unless you are getting rid of the heat of compressing the air, you're not getting much gain at all. Really just blowing hot air... Provided your exhaust valves are not leaking, if your EGTs never got above 1200°F pre-turbine and your engine did not overheat I doubt your rings got hurt. Also, boost will not push past rings, it will create higher cylinder pressures and push the rings more firmly against the cylinder walls.Really, if broken in correctly, the rings should mostly seat within the first hour and fully seat within 1,000 miles. That said, I seem to recall a fair amount of idling after the initial assembly...