well it sounds like a oil starvation issue due to excessive load. was your crank cross drilled and chamfered? that usually helps the the oiling issues . Another thing we used to do with high performance 510 and 240z engines was put on higher pressure and flow oil pumps. In fact Nismo sells kits for that. At least for the L series engines. Probably for the SR too. Anyways you got boost crazy and you paid the price I feel for you. I know its the toughest thing knowing that you could have held yourself back but did not. No engine is bulletproof regardless of how its built.
There is always a driver out there that can blow it up. Thats why you see F1 drivers shelling their engines a part way into a race.
Comes with the territory you play you may pay. may sound cold but its true .
You do have my deepest sympathies though . It sucks and I hope to never be in your shoes( steps back crosses chest and looks upwards).
Oh well there is the possibility you might be able to just polish the journal and put in a new bearing because you caught it early . Good luck
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