Quote:
Originally Posted by LiquidZ
How do the more turbo savy people here feel about the 20G and its journal bearings? I'm no expert, but people have convinced be that ball bearings are always better for turbos.
Thoughts?
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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 had 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.