don't know pressure but those sound high to me.
what happened to the old turbo ? did it fail in use ?
did you confirm oil flow at the block before fitting the feed to turbo ?
did you fit a new feed pipe or at least clean out the micro filter in the original feed pipe bolt(very carefully mesh is tiny)
was the turbo primed before fitting with fresh oil to flood the bearing and confirm oil path was ok before fitting feed pipe?
where are you looking for oil from turbo from underneath with drain/return pipe removed, also was this pipe clear and clean.
Right, I've borrowed a car data disc and found that the max oil pressure @ 4000rpm should be 4-4.5 bar (65 PSI). I'm hitting 100 PSI which can't be good.
The turbo was reconditioned as the insides were catching the casing and it was noisy. It's had bearings replaced and balancing done etc and now sounds better.
Oil flow at the block was checked prior to connecting up the turbo. The filter was cleaned and the turbo primed with oil by hand prior to running with oil flowing through the turbo without any obstruction. Return pipe was also checked and clear.
The main reason I ended up reconditioning the turbo was due to a sound whilst driving that's been annoying me for months. It's a jittery pressure release kind of sound that generally only occurs when I labour the engine under throttle then put the clutch in to change gear (though it can happen occasionally without clutching). It's almost akin to a dump valve noise but more high pitched and jittery rather than one continuous release of air.
So the latest theory is that the high oil pressure I'm experiencing is responsible for movement in the thrust plates in the turbo and causing "end float" which has caused the turbo to scrape the inside of the casing etc. I'm also thinking the oil pressure relief valve might be the cause of the pressure release sound I'm hearing when driving the car..
Has anyone got any knowledge of the oil pressure relief valve, it's location and any tendency for failure?? Or any other reasons why my pressure might be so high?