Quote:
Originally Posted by RUQWIKR
Remember, these engines have the AFM / shifting lifters on cylinders 1, 4, 6, & 7. Even though AFM is not active on any ZL1 nor manual SS's, the hardware for AFM is all there. The AFM lifters do not take high rpm's as well as the regular lifters and are more prone to internal damage on over rev's. That's why they are replaced, typically, when aftermarket camshafts are put in because of the lobe profile differences along with the typical increase in fuel cutoff rpm put in aftermarket tunes.
Either way, over rev's causes valve bounce, valve spring bind & rotation, lifter over travel, etc. As TrackClub and others have pointed out, a single over rev can cause component failure - or not. Multiple over rev events can cause a component failure - or not. Any way you cut it, try not to over rev on up or down shifts.
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Words of wisdom! And ya, i forgot about AFM as another weak point. Regardless, failures can happen immediately due to a catastrophic event, or due to fatigue over time.
Tons of examples not only motor wise, but also other components. Run slicks on a street car long enough and one will be replacing hubs and control arms - guaranteed. Rotors and wheels can crack due to metal fatigue over time, etc. Bottom line: the fact nothing let loose is no guarantee it won't in a near future if it has been stressed beyond its operating specs.
So the OP can get lucky, or his luck could run out at a next track event. Or one after that. Or whatever.
In any case, i would caution against proclaiming everything is peachy, because that would be way premature a verdict imo and for whatever it is worth.