How many rpms before damage to the crankshaft??

[mauricioxm]

Is a rally car..

[severous01]

you're valves will float and you'll backfire/pop a piston first. crank jsut spins...

[cali yaris]

stock limiter is 6250. I have mine at 7300, with stronger springs.

So, the answer is "it depends on what mods you've done to the head".

[Bluevitz-rs]

My stock limit is 6500 for an '05 Echo