Cylinder wall problems ( never seen anything like it)
Okey gents, lets sum up.
The causes:
1. Bores out of roundness ( lack of torque plate? ) All the scars and bold spots.
2. Gas washed the oil of the walls ( flooded last burnout )
3. Discolour on walls made by heat (no oil on walls ) and chemicals in octane boosters.
4. Dents with white rings below piston rings at the bottom in cylinder walls = MYSTERY
Does this sound right?