Originally Posted by Sharif@Forged

The spooling benifets of BB vs. journal are vastly overstated, IMHO. It's the size and structure of the turbo, and the displacement of the engine that has a much greater impact on turbocharger spoolup characteristics.

We just a BB turbocharger on XKR's car take a dump after 3000 miles. Garret could not determine the cause of the failure. With Greddy, I have had modified turbos go bad, but haven't had any factory Greddy turbos go bad.

I am not suggesting that journal is more reliable than BB, but I am stating my experience to show that textbook discussions, can vary wildely from practical experience and application.