I never heard of anything like that. I am new to forced induction, so, I am woefully ignorant of the whole scenario, but I have been around fast cars with modified engines since 1955 (no typo) and retarded timing was never a factor in the mixture's rich/lean scenario as far as I ever heard, and the only "lifting of ring lands" I have ever experienced (or, seen, or heard of,) was the result of too little end gap on a supercharged or turbocharged engine, which resulted in the ends of the ring coming together, making it impossible for the captured ring to grow in length any further, so then, when additional heat tries to expand it further, it becomes forcibly locked in position in the bore, and the next trip down, the crank pulls bottom of the piston pulls so hard that the piston separates and the ring land is "lifted" off the piston.
I don't understand the dynamics of combustion BELOW the ring land making that happen.
Please educate this old-timer, who obviously doesn't "get it.":oops:
