Quote:
Originally Posted by Boss330
Not sure why you call a twin turbo "in-efficient"? Are you saying that the BMW M5/M6 engine uses in-efficient turbo design? A smaller turbo has lower inertia, quicker spool up etc. It's also easier to keep exhaust gas speed higher with smaller diameter tubing and inlet (can be done on a big turbo as well with advanced interior design of exhaust tubing).
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Apologies for not being clear, I am talking about multi turbo systems on a single bank, like the BMW tri turbo inline 6. These systems have complex plumbing systems which lead to in-efficiencies.
Yes turbo's have lag, but no different to the NA engine that has lag from idle to redline, as it never experiences the torque wave produced by FI.