Turbo not level or balance

[Gtti_LAN]

I tried to do my own research but still not satisfied..
Can a turbo performance drop due not level.
Last time i did my banana its 'tapak' was not really level (see picture) i had 2 turbo change..due to not proper oiling but the oil preasure was good.
can this be the problem.

 

[SDF]

do measure your oil pressure via a gauge during idle and during running... alot of times the pressure on idle is good, but when you rev it on the road..the pressure either stays the same or drops...this means the oil pump may have it's problem or something is blocking the supply...

the angled turbo won't have performance drop.. the other thing we can't really tell is how is your air intake system and is it tight ? your picture can't tell too much mate.....

 

[hanslin]

that true and search leak on your pisang too!
can tell what r&d u trying and what u did?