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I installed a Stock m106 setup on 5spd swapped car. The turbo had ZERO shaft play with no smoke under boost which would seem to indicate it was healthy.
Stick with me here... I'm thinking the m106 charge pipes are less than optimal for a 5spd car. Under high boost situations, the throttle plate closes between shifts causing compressor surge. This is much less an issue with an auto car. I hypothesize this in large part killed my otherwise healthy turbo. With the m102, TCD, or BOV setups any surge is eliminated or minimized due to the design.
Discuss. Thoughts?

I think you need a BOV. Cheap insurance. That's what I did on mine but then again mine is a 7 psi setup. How high did you go?

demetk wrote:I think you need a BOV. Cheap insurance. That's what I did on mine but then again mine is a 7 psi setup. How high did you go?

Stock tired WG, so maybe 5 if I was lucky. Can the .013 compensate for dumping to atmosphere without the motor dying?

You can try dumping to atmo. Contrary to other people's recommendations, I'm doing that with the b35 and the 179 ecu and it has been working fine.

TCD kits use a bypass valve. I doubt that killed your turbo so quickly. Probably just old junk The newest m106 k27 is 30+ years old.

Used the M102 bypass valve on an M106 with a manual trans. The turbo started smoking after a couple months. Prob an old turbo.
Replaced that with a new Mellett center section along with the M102 piping and after four or five months there was seepage from the bearing area.
Most precautions taken: Wired in the cooling fan, duct work, timing box, used synthetic oil, pre-lubed the new turbo before starting it up and the same
behavior occurred.

The demise of this engine was that at some time in the life of the M106 it had its stock pistons changed out with piano tops. Not knowing this I ran
91 octane without a shot of Toluene at a lower boost and broke the ring lands in 3 psitons.