Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
Question for RickyMK7R - was your tune running particularly rich when the turbo failed? I followed all the previous discussion, but none of it really fits with what the photos show. Obviously there is plenty of impact damage from bits of the turbine flying around, but the photos actually show erosion damage on a few of the blades as well. Most of my failure analysis experience is with industrial steam turbines, but it definitely looks like moisture impingement. A small amount of fuel going to the turbine won't usually hurt it as it stays in vapor form, but put enough in and it will form droplets when the pressure/temp drops across the turbine and erode the blades, especially if it's pulling timing and still adding fuel, this is a real possibility. The moisture also causes extra stress on all the bearings by adding lots of vibration, which could have led to blades contacting the housing.
Solid analysis. Thanks.