"FOD" it sure was,Originally Posted by MS-75
Be it the plugs that have died/ destructed from over boost and or the motor running lean and the combustion chamber temp sky rocketing, (this will also melt the tops off pistions)
Or from something coming in though your intake, turbo blades or rocks?
I had some arsehole at the drag's drop a hand full of steel ball bearings down the throat of my unfiltered turbo and the piston tops look much the same after one run.
Detonation is more likely to cause the pistons to fail by cracking, I have a set to prove it from a 1G that broke the ring lands.
That motor needed rebore and new pistons from the deep scratches in the bore from the broken pistons
hope you find the cause
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