posted June 08, 2010 08:05 PM
Ok, girlies might not care but motor heads might cool video of BMW valvetrain at 14,200 rpm. http://www.youtube.com/watch?v=nsa6kq-qqIE ____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
posted June 08, 2010 09:30 PM
With the valve springs and retainers rotating like that, shouldn't the valves be floating or coming close?
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2007 ZX-14 black
Brocks s-meg exhaust
PCIII w/track map
BMC race filter
Flies removed
16 tooth front sprocket
Speedohealer
APE cam chain tensioner
Vortex rearsets
posted June 09, 2010 09:00 AM
Thats cool, as far as taking a long time to spool up, that was done on purpose, that thing will shoot up to redline reallllyyy quick!
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07 ZX14 bmc filter, muzzy m14, 16/44,66",auto shift, 6'3, 204lbs/1.54/3.99/6.03@120/7.8/9.32@147
biggmo@aol.com
quote:With the valve springs and retainers rotating like that, shouldn't the valves be floating or coming close?
Its similar to other over head cam valvetrain but no the same.
Ypu can see the followers, acting on the valves driven by the cam lobes.
They act as levers and accellerate the valves to wfo position much faster than conventional buckets on a cam lobe do, which means the valve is wfo for more crank duration.
A cam acting on buckets would have to have rectangular shaped lobes to have the same effect, which mechanically is impossible.
This superior valvtrain design and head porting / combustion chambers are what allow the bmw to make so much power in comparison to the others.
KTM uses very similar design as well, and the allows their bikes to make superior HP to the Jap 4 stroke motocross bikes. cc per cc. as well.
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
posted June 10, 2010 12:55 PM
I love that goddam BMW, to bad Im 6'3" 325 and I like to take longer rides!
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2012 ZX14, Ceramic Coated Brock's CT Meg, PCV, throttlemeister
posted June 10, 2010 09:18 PM
Hmm, where are those things sold at? I'd like to take one for a spin!
____________
2007 ZX-14 black
Brocks s-meg exhaust
PCIII w/track map
BMC race filter
Flies removed
16 tooth front sprocket
Speedohealer
APE cam chain tensioner
Vortex rearsets
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posted June 08, 2010 08:05 PM
