[StanDiego]

Originally Posted by t0pless

Possibly. I had this discussion with my friend about this. I’m no law expert, but these are considered for off road use only, and there is usually an acknowledgement about limited liability. This goes for tuning as well.

When you mod, i imagine you assume all risks barring gross negligence. If I could prove they knowingly sold me a product that was defective, then maybe.

Either way, I would never sue a company over something like this.

I've noticed recently that some of the tuner products that once offered a "warranty" on the engine no longer do so.

[Balr14]

Maybe I'm too "risk adverse", but it certainly makes me think twice about buying a Pure 800.

[t0pless]

Originally Posted by Balr14

Maybe I'm too "risk adverse", but it certainly makes me think twice about buying a Pure 800.

I’m with you on that. It’s mode of failure was pretty dramatic and I wasn’t even pushing this turbo that hard. I’ll still give them one more chance though as any turbo upgrade has its pros/cons, especially hybrids.

Anyway, turbo is coming back today. Apparently the failure was not tuning or oil related which is what I anticipated. During boost, there are axial forces on the turbine and compressor wheels. This force is also referred to a thrust. To counter this thrust, there is a thrust bearing that limits the in/out play of the turbine shaft.

Apparently when the turbo went off throttle, there was an “inverse” flow of air (not sure if I believe that) that caused the compressor wheel to thrust out and into the compressor housing. You can see the exducer wear marks on the compressor housing which had to be completely replaced. I’m lucky that the blades didn’t break and send metal into the intercooler.

[tracer bullet]

Obviously the engine isn't suddenly spinning backwards but maybe they're saying that instead of pressure relief the normal direction, blown off, diverted, etc. that it somehow went towards the intake? I see the potential evidence for it* but it stills sounds odd. You'd think if this was a thing, they'd have seen it on other B58's.

* It's always possible they have misdiagnosed it. It could have been reversed airflow but it also could have been something else that simply looked like it. Often more than one cause with similar symptoms.

Or if it is indeed a reverse airflow issue, stating the obvious, you'd have to consider what else may have happened or would be in need of an upgrade to prevent it in the future, if this turbo is overwhelming some other factory component? Or it's a tuning issue, not reacting fast enough?

[t0pless]

Originally Posted by tracer bullet

Obviously the engine isn't suddenly spinning backwards but maybe they're saying that instead of pressure relief the normal direction, blown off, diverted, etc. that it somehow went towards the intake? I see the potential evidence for it* but it stills sounds odd. You'd think if this was a thing, they'd have seen it on other B58's.

* It's always possible they have misdiagnosed it. It could have been reversed airflow but it also could have been something else that simply looked like it. Often more than one cause with similar symptoms.

Or if it is indeed a reverse airflow issue, stating the obvious, you'd have to consider what else may have happened or would be in need of an upgrade to prevent it in the future, if this turbo is overwhelming some other factory component? Or it's a tuning issue, not reacting fast enough?

I was thinking along of turbo surging/overboosting during shifts, but my logs are clean with 0 boost spikes. Other than that, not really sure 🤷‍♂️

Received the turbo back yesterday and got most of it installed. I forgot how much of a pain in the ass it is to reinstall the turbo vs removing it was… and I just did this 2.5 months ago.

Working on trying to remove the oil cooler without disassembling the intake manifold and all the other crap. TIS suggests to tackle it from underneath the car after removing the undertray covering the trans pan… but it’s tight.

Battery was dead after all the engine priming. Hoping to get this back on the road this afternoon.