Originally Posted by Dan
Originally Posted by Mike Rainbird
The latest roller bearing T38 flows 44lb of air - ideal for 460+bhp on a good engine
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What's the Lag like on it Mike and again, how good is it in comparison to a GT30 that everybody raves about?
I have never seen a compressor map for the integrally waste-gated GT30, so can't comment. But the new generation ceramic roller-bearing core gives a big reduction in LAG (not to be confused with spool-up), due to the fact that the turbo keeps spinning freely for a lot longer than with an old style core. Obviously spool up is governed by exhaust gases produced, so this is improved by only a few hundred rpm at best.