Quote:
Originally Posted by absolutezero
Can you show data that supports that a significant number of today's turbos will need replaced within that time/distance?
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No one has any long term reliability data on modern turbos because, well, they're modern!
They haven't been around long enough to know.
I think it's a pretty safe assumption to say that a naturally aspirated engine should (statistically speaking) outlast a comparably engineered turbo engine. Turbochargers live a very hot and abusive life. They push the boundaries of material science. It's not unreasonable to say that they'll suffer failure before a naturally aspirated engine that is inherently simpler.
EDIT: That said, I'll take the surging rush of a turbo car over N/A any day of the week. I'm addicted to FI!