2010 BMW S1000RR cut engine 4 valve action 14000 rpm

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  Autos & Vehicles

[andywhiteley1]

sounds more like 13999 then 14000 to me

[Aäron Destoop]

Valves does rotate, if a valve doesn't rotate, it will be bended during the lifespan of the engine. Every piston engine has rotating valves, make your homework first ;)

[islandrider19]

Most sports bike engines do at least 14 000RPM, and are not even in the redline. Some even redline at over 18 000RPM (i believe the one i saw was a Yamaha R6, back in 2007). And yes, it will hold up for a fair amount of time, even at very high revolutions.

[nhhytf hjghyuhjimk]

I don't think the engine would hold up to that high rpm. But I honestly that it'd float the valves before it blew anything. Because, at that rpm, things are moving so fast that if anything gives way or breaks, It's gonna be carnage.

[janderson robriques]

sonho



[dennismeukens]

now touch it.

[sportsmanpride]

so id like to understand how this engine is running.

[daniimatt170409]

The shiny patch on the top of my valves where the roller tip runs is in line with the rocker arm, which would indicate to me that my valves are not rotating. I dont have siezed roller tips, poor valve train geometry or wrong spring hieghts either. Anyway, its no big deal.

[jwg22]

Um, I've never heard of keyed valves. Single groove locks do a good job of positively locking the valve to the retainer, but the retainer rotates. And Springs rotate as they are compressed, which is the driver for valve rotation. Every drag race engine and Sprint Cup engine has rotating valves.

[I'm TheSteadyCamel]

no you re wrong that phenomenon is known as valve floatation and its not a positive thing

[vegaquarker]

Nice, thank you for the upload.

[daniimatt170409]

Most standard engines i know of have rotating valves, the reasoning behind this is to try and keep the valve seating face cool. However in saying this, most high performance or race engines i have seen have single groove valve locks which stop the valve from rotating. It seems favoured in race engines to do it this way, i know the valves in my drag engine certainly dont rotate.