Quote:
Originally Posted by ASAP
I dont understand the comment... this is not engine dependent but turbo sizing dependent. If the turbo can't hold boost past a certain rpm, it's useless to wind it out that far as you are actually losing performance. There is no way that they can size a turbo (whether 1,2 or 3) to be high revving, torquey and very responsive. Then comed the problem of gearing it right to take advantage of the spool... this would feel very weird if this thing really revved to 8k.
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So it's very weird that the McLaren MP4 revs to 8500?
Numbers are just numbers without the context of the whole picture. FI engines can be sized to run to high RPM, just depends on the configuration of the turbos, etc.
The S55 will have at least two turbos, and who knows what kind of technology behind them. Since BMW is moving hard toward single twin scroll turbos on their I6's, this is a significant departure and can't be overlooked in light of the "close to 8,000 RPM redline" claim.
Most turbo engines on the road are low redline simply because they can be, and because it's cheaper to do so. Resources are not blown simply to make a number in Top Trumps. If a car meets targets for performance and economy, then a redline point is pretty pointless. Let's face it. 99% of drivers out there don't rev their car hard on purpose.