I'm rebuilding my K26 and got it back from ballancing.
I need to know what the torque spec is for the 4 compressor housing backing plate bolts.
And the torque for the shaft nut. (on the compressor wheel).

I had it ballanced by Turbo and Electric in Phoenix. I'm glad I had it ballanced. There is quite a bit of material that is removed to ballance it. They also cleaned and pollished the shaft and ring lands. all for only $60 incldung shipping.

 

I've never seen a torque spec published by Porsche for the turbo itself ... maybe a turbo rebuild house can give you their specs?

 

I know Porsche does not have a spec in the workshop manuals.

I will try to call a rebuilder.