Quote:
Originally Posted by chris719
There is no such thing as protection from mechanical over-rev. You can cut fuel or spark or whatever you want, but the engine is going to reciprocate faster than it's supposed to.
Some engines just have more margin built in or you get lucky.
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This margin you speak of is design safety margin for me. The V8 in my Mustang revved up in the money shift situation but only to a point. It stopped at the rev limiter and then I heard squeal from the rear tires. So at 7200rpm the engine had enough drag to significantly slip the rear wheels. I’m honestly not sure how Ford did this, but I’ve done it 2 or 3 times over the 5 years I owned and tracked the car with the same result. The engine never once over revved.
But the exact same behavior more than once is not chance. It’s design. Too bad BMW can’t do that. Perhaps the inertia of a 5L V8 was enough with fuel cut and spark retardation. Perhaps there was more to it. I don’t know. But it’s possible to do.