Garrett PowerMax GT37R Dual Ball-Bearing Turbo
2008-9-5 · A bb turbo has steel or ceramic bearings instead of a brass bushing. They are suppose to spool 25% faster than a journal bearing turbo. They get feed less oil pressure because the shaft is supported by the bearings unlike a journal bearing turbo which relies on oil pressure to suspend the shaft in oil to keep it from touching the brass bushings.
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