Something bad happened (overrev): How catastrophic?

[1000hp]

Originally Posted by TopJimmy

This is the best analogy I've heard yet on a money shift over rev!


On the case of a spun crank hub your legs are the valves getting banged.

Haha thanks.

[EricP3]

Originally Posted by 1000hp

Like stevenc said, the limiters are electronic, not mechanical. The engine limits revs by cutting either fuel or spark, or both, to stop the engine from revving.

Ever go down a hill on a single-speed bicycle and try to stop the pedals with your feet? When the pedals kick the shit out of your feet and legs, that is what's happening to your engine in a money-shift situation. When you money-shift the car, the engine is being driven by the drivetrain instead of the other way around, and unless you react quickly enough to immediately put the clutch in, there is nothing you can do to stop the overrev.

Yeah that makes sense but OP said this happened to them while they were in neutral and just hit the gas.

[1000hp]

Originally Posted by EricP3

Yeah that makes sense but OP said this happened to them while they were in neutral and just hit the gas.

Not possible unless his tune raised the rev limiter to 8200+. The computer will not allow the engine to overrev itself.

[jfritz27]

Originally Posted by jfritz27

Tommy/MadM2C: The 8200 overrev definitely happened, confirmed by RaceChrono's RPM log during the lap. I must have grabbed the wrong gear and don't remember (my GoPro died before that lap so I can't visually confirm, but there's no other way).

See above

[Kuervers]

either way no engine damage just made the CBC bolt loosen off. I didn't I'd the problem right away and mine had same fate

[fretchh]

Wheww, glad to hear its all good!