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View Full Version : Valve Float - Video OMG



dsp26
14-08-2008, 12:26 PM
we've all known what valve float is and the consequences, etc... this is the first time i've actually seen it in slow motion...

i cannot believe the retainers are rotating freely.. F*ck!

http://www.youtube.com/watch?v=_REQ1PUM0rY&feature=related

CRXer
14-08-2008, 01:42 PM
nice find ronny,id hate to click on your bookmarks tab,it must take at least 5min to load,lol.

u just scared me out of trying to push to 8700 to sneak across the line in 3rd,thanx:(

dsp26
14-08-2008, 01:47 PM
well.. is 13.8-13.7 worth it to you :p

that vid doesn't look like a severe case though.. i've yet to find one showing the rockers going back down before the springs get back up.. surely in that scenario the keepers would come lose and then dropped/bent valves lol.. well not really "lol" if it happens

CRXer
14-08-2008, 02:09 PM
well.. is 13.8-13.7 worth it to you :p



thats a difficult question when it involves less than 1 sec of over rev & not knowing what hondas safety factors are on the motor & the pure fact that im just plain greedy,lol.

CRXer
14-08-2008, 03:41 PM
regardless of whether its a case of bind or float,wouldnt it be more about the fatigue like they say of all 3 components working abnormally to there original design purpose & opening up angles that are not just simply straight vertical anymore?

nd55
14-08-2008, 04:27 PM
I think that's footage from a "Spintron" or similar gadget which the Nascar people use to try and get small block Chevies to spin to 9000RPM.

I think you'll find it is illuminated by a stroboscope so the camera only catches a single frame per revolution. Kinda like slow motion.

There's no denying the valve train is a miracle of engineering though.

Nick.

delsol9000rpms
14-08-2008, 05:00 PM
ive seen this video its very interesting... makes you think twice about cheapening out on valve springs loll

good thread very interesting

e240
22-08-2008, 08:10 PM
Desmo Valve system FTW
http://www.youtube.com/watch?v=0BwlJ39KYzc&feature=related

No Float!

DLO01
22-08-2008, 08:31 PM
Absolutly! What an awsome idea. So simple, so affective. Who thought of the spring?

e240
22-08-2008, 08:43 PM
Ducati engines have had them for yonks now...