Looks just a little bit scary. Engine is a BMW S1000RR superbike, with a 14k redline. So 7,000RPM for the camshaft.
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What a camshaft looks like, in an engine @ 14k
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Pretty sure someone posted that a couple months ago, but it is still baffling at how fast those are tapping.
It's moving so fast it's not moving at all.
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Is that JB Weld on the left edge of the casing?
The entire valve spring looks like its rotating!
There are 600 CC sport bikes that rev to 16K. This is the reason we now have titanium valves, reduce reciprocating mass. Didn't formula 1 go to electro-hydraulicly actuated valves?
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Man that`s INSANE!!!!!!!!!!! Sooooooooo cool!!!!!!!! Wonder what kind`ve oil it`s using :^)
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Wow. That's nuts.
It's amazing that any air is getting moved! What's the length of the time for the valves being open..... Maybe a billionth of a second?
The valve springs are rotating.
That really is amazing. Id like to see what the crank and pistons look like at that speed.
Its things like this that makes me love engines.
I believe formula 1 goes to 21k RPM
I know Yamaha's R6 Revs to 17k RPM (or atleast did a few years ago)
its crazy that it all stays balanced and does not rattle itself apart.
Its things like this that makes me love engines.
I believe formula 1 goes to 21k RPM
I know Yamaha's R6 Revs to 17k RPM (or atleast did a few years ago)
its crazy that it all stays balanced and does not rattle itself apart.
I'm surprised it has valve springs, a lot of high RPM motors do away with them.
Crazy seeing the valve springs rotating, yes! Awesome optical illusion at that certain RPM, too.
Smokin'!
Smokin'!
Originally Posted By: JetStar
There are 600 CC sport bikes that rev to 16K. This is the reason we now have titanium valves, reduce reciprocating mass. Didn't formula 1 go to electro-hydraulicly actuated valves?
Formula 1 uses pneumatic valves. They have an accumulator with nitrogen in it that is about the size of a soda can.
Current formula 1 engines are rev limited to 18,000 rpm but I've seen a Cosworth 2.4 liter V8 rev to 20,000 on the dyno in a you tube video.
Here is what one looks like:
There are 600 CC sport bikes that rev to 16K. This is the reason we now have titanium valves, reduce reciprocating mass. Didn't formula 1 go to electro-hydraulicly actuated valves?
Formula 1 uses pneumatic valves. They have an accumulator with nitrogen in it that is about the size of a soda can.
Current formula 1 engines are rev limited to 18,000 rpm but I've seen a Cosworth 2.4 liter V8 rev to 20,000 on the dyno in a you tube video.
Here is what one looks like:
Cool
Built very well!
Built very well!
Kestas
Staff member
I've seen slow motion films of valve trains operating at high rpm. At high speed you can see the secondary compression waves within the valve springs.
I guess this brings up the point whether the occasional high rpm WOT run is good for the engine. Some advocate it, some goes against it.
The point is, the valves are indeed designed to rotate above a certain rpm, which helps in maintaining an even sealing surface at the valve seat.
An engine that never sees higher rpms will have the valves wearing a certain pattern on the seats, which may hurt sealing efficiency and ultimately hurt power output?
Any thoughts?
The point is, the valves are indeed designed to rotate above a certain rpm, which helps in maintaining an even sealing surface at the valve seat.
An engine that never sees higher rpms will have the valves wearing a certain pattern on the seats, which may hurt sealing efficiency and ultimately hurt power output?
Any thoughts?
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