Quote:
Originally Posted by ShocknAwe
Interesting. I believe the 7k rev limiter on the N54/55 is set due to CFM limitations of the turbo. It's possible that turbos with efficient high rev flow could run to an 8k limit with the bore stroke, but then would see as many or more bearing failures?
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Absolutely! For shits and giggles the car could physically stand to rev higher until you run into things like valve float and injector window limitations (not sure where those come into play for this car as it's not a VW or Honda so people don't do that kind of stuff for the most part) but as the stresses increase exponentially with increased RPM reliability would decrease fast the higher you raise it, and not just the bearings! Who knows what would fail first in that scenario. And of course with stock turbo it would make less and less power as you go up, due to flow limits.