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N54TT

Specialist
Jul 21, 2020
87
30
0
California
Ride
2013 335is
Yeah still waiting to see the details of what happened with that one, quite a few sets sold, I'd estimate maybe 40-50 or so sets already, that one is the only one I've heard having any issues. Generally speaking with a turbo if there is an issue with the build or parts it'll show itself very quickly so the 200 miles doesn't surprise me, but I'll know more when we find out more. :)

Chris

Any updates on this or still haven't been able to dissect the turbo?
 
Oct 24, 2016
1,148
1,184
0
43
Scottsdale, AZ
Yep! We believe the cause was the extended bullet nuts we swapped to. There are some (minor) aero advantages to the longer nuts (and they do look cool), but they're heavier and the mass is further away from the supports, which can cause whipping at higher shaft speeds even if balanced perfectly at 120k RPM.
 
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