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Old 06-26-2008, 06:22 PM   #6
OCswedishM3
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Join Date: Jun 2005
Location: Manhattan Beach
Posts: 2,067
My Ride: E63 AMG
Quote:
Originally Posted by BimmerDude18 View Post
I doubt it, but there are enough FI S54's to kindof answer the question.

It will wear out the rings eventually. The S54 is high compression and has an efficient head, the rings are getting put under more stress because of the extra boost and will wear out faster (hotter temps don't really help).

How much faster will depend on more than just mileage, if you drive out of boost more of the time there won't be much effect, if you only drag race the car the motor will be shot pretty quick.

Any FI beyond 5 psi on any motor (unless FI stock) should be prepared for a rebuild at some point, even if just hone and new rings, the teardown is the $$.
What do you think if you only run 104octane? Will that increase the longevity of the motor?
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