Black Stone Report

[maniac]

Either you or he has it the wrong way around. Limit the rpm and make sure the engine always has load for correct ring seal. The combustion pressure generated by the larger throttle openings is what creates the pressure on the rings and the force necessary to push them against the cylinder walls for break in. Highway cruising at steady low load rpm is the worst thing for ring break in or any elevated rpm with low load.
Phil

eek
You are 100% correct Phil ( serves me right to post whilst on the booze adn its been a while since i broke in an engine......my current supra had 3000 kays on it). I scrambled back to my notes from 2017 i was given........ ( last built engine was done by mostech in Brisbane - sent the car up there from Sydney)

It matches above but also to alternate rpms a lot and always engine brake.........avoiding highways with constant rpm. I remembered 1000km as they said rev it to wherever you want after 1000kms. Tight tolerances and was the mahle pistons that use the metallurgy that doesn't expands much as their drag type pistons. They have the same two types available for our b58 with the cut outs for the direct injection. Definitely sticking with mahle pistons and carrillo rods again.

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[Funkjaw]

Here's my first/baseline black stone. For context this oil change cycle was over the hot Texas summer. I daily drive the car, no track days - but I drive rather aggressively; full send touge runs, toll road showdowns, parking lot donuts, etc. So far so good. Nice healthy engine.