806709-30 , Scania OEM turbo, boreless. It lasted about 300 000 km, about 200 k stock 450 hp , rest about 660 hp, boost was stock 32 psi, tuned 35 psi and backpressure was under boost at max torque, at max hp a little bit higher than boost.We have no trouble out of the Garrett journal bearing stuff. Which wheel is it you are running? Boreless or a through bore?
Intake side, stock factory setup. Garretts are just built wrong. Cheaper than Holset, that's why Scania started to use them.Is the majority of the wear on the exhaust side? Do you happen to have an oil restrictor?