BMW S1000RR Titanium Valves at 14,200 RPM - Page 4 - SV650.org

yorkie_chris · 23-02-10, 10:49 AM

Hydrodynamic bearings just same as main bearings on your bike, yup oil works.
Some use ball bearings or ceramic ball bearings too.

Oil shear depends on the oil film thickness, the oil doesn't care about absolute speed.

23-02-10, 10:56 AM

No idea what the speed of the actual valve is when the cam lobe pushes it. Rather rapid I imagine. Anyone got a guesstimation?

yorkie_chris · 23-02-10, 10:59 AM

See if you can find specs about valve lift and duration and you can work out an estimate

07-03-10, 04:04 PM

More BMW S1000RR valve action

http://www.youtube.com/watch?v=Ed-l2Ot_d9c

Shows just how much rotation goes on

squirrel_hunter · 07-03-10, 11:41 PM

Thats interesting nice to see it from the other side.

23-02-10, 10:49 AM	#31
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: BMW S1000RR Titanium Valves at 14,200 RPM Hydrodynamic bearings just same as main bearings on your bike, yup oil works. Some use ball bearings or ceramic ball bearings too. Oil shear depends on the oil film thickness, the oil doesn't care about absolute speed. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat Last edited by yorkie_chris; 23-02-10 at 10:50 AM.

23-02-10, 10:56 AM	#32
sinbad Guest Posts: n/a	Re: BMW S1000RR Titanium Valves at 14,200 RPM No idea what the speed of the actual valve is when the cam lobe pushes it. Rather rapid I imagine. Anyone got a guesstimation?

23-02-10, 10:59 AM	#33
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: BMW S1000RR Titanium Valves at 14,200 RPM See if you can find specs about valve lift and duration and you can work out an estimate __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

07-03-10, 04:04 PM	#34
Alpinestarhero Guest Posts: n/a	Re: BMW S1000RR Titanium Valves at 14,200 RPM More BMW S1000RR valve action http://www.youtube.com/watch?v=Ed-l2Ot_d9c Shows just how much rotation goes on

07-03-10, 11:41 PM	#35
squirrel_hunter Member Mega Poster Join Date: Apr 2005 Location: Sunny Swindon Posts: 3,579	Re: BMW S1000RR Titanium Valves at 14,200 RPM Thats interesting nice to see it from the other side. __________________ "A little enthusiastic?" May I add here, GG is awesome and I think I am in love with Stretchie...he rocks my world! SH2 \| 2MA \| GROM \| YSR

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