As it says , what could be some causes of lifted ring lands on a procharger motor ? This was a fuel injected motor

The only thing that will lift the ring lands is detonation. Why did it detonate is the magical question.

What was the timing? Boost? Compression? Cylinder heads? Camshaft?

Cast iron world heads , timing don't know, it was a stock MpI motor, May not have had a good tune on it then.

This is a friend of a friend that had this issue, I don't know all of the details.

Just getting some possibilities for him. I thought detonation also when he said he had cast iron heads and too much timing or no boost retard set in the program.

TurboJack wrote this on a duplicate post

Detonation.

Detonation is caused by too much timing, engine to warm/hot, too much boost, lean afr, and octane of fuel.

Give us more details and we can figure out why.

I learned back in the late 70,s what detonation was when I blew a hole in a piston with a 850 HP gale banks twin turbo setup.

Too much timing, not enough timing, too little fuel, too much fuel, too much boost, too hot of intake air charge (clogged intercooler), too hot of a spark plug, too hot coolant temps, intake tract sucking oil in from somewhere, all things that can contribute.

I heard it was only 7-8 lbs boost on an M3

It was not a stock MPI motor.

So, if the tune was for a stock motor, that may have needed changing.

Furthermore, the ATI method of 'tuning for a supercharger' has always been a lackluster, not too mention their fuel systems themselves.

The stock 502 pistons and rings can usually take quite a beating....the headgaskets usually can't...but again, the heads and headgaskets have been changed to something stronger than OEM.

Funny. This all seems that it has nothing to due with the procharger, These are normal issues you need to deal with on a forced induction motor, He is removing and going NA this time around.
He just wants to from a to b and doesn't want to deal with the extra hassles of forced induction

Me no comprendo.