no more valve springs? - 460 Ford Forum
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post #1 of 11 (permalink) Old 11-20-2010, 06:39 PM Thread Starter
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no more valve springs?

I spotted this video on you tube, it shows an engine system for push rod engines that does not require valve springs. any thoughts on this?
here is the vid if you would like to see it.

http://www.youtube.com/watch?v=GXIdOTkJhEY&feature=fvw
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post #2 of 11 (permalink) Old 11-20-2010, 07:05 PM
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Good idea in thoery but too many moving parts to wear out, Once the links start to wear do you adjust thing to not shut the valve all the way or not open it all the way. Seems like it would be short lived at best.

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post #3 of 11 (permalink) Old 11-20-2010, 07:55 PM
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The lifter looks like it would fail rather quickly.
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post #4 of 11 (permalink) Old 11-20-2010, 08:43 PM
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why didnt they take it up to 8-9 grand to see how all that free horsepower would sound?
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post #5 of 11 (permalink) Old 11-20-2010, 09:37 PM
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I actually see that design capable of some serious r`s. With oil control technologies, this system I believe will take off. I`m game, but costs and machine work might be out of reach. The cam profiles are limitless! Say bye bye to roller cams and the "king of the hill" title. Ramps?, ha, gimme a lil more eccentric.

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post #6 of 11 (permalink) Old 11-21-2010, 09:06 AM
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Sounds like a sewing machine.

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post #7 of 11 (permalink) Old 11-21-2010, 09:42 AM
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I saw that about a year ago. It seems like there's some merits to it......
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post #8 of 11 (permalink) Old 11-21-2010, 11:14 AM
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http://en.wikipedia.org/wiki/Desmodromic_valve

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post #9 of 11 (permalink) Old 11-21-2010, 12:40 PM
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Quote:
Originally Posted by DFI429 View Post
WOW, I never realized Ducati uses this system. There were alot of pros and cons to it. China couldn`t get in this game due to poor metal qualities. I also never realized that Indy car uses a gas charged system that has virtually no reciprocating weight or kenetic energies. Very good read.

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post #10 of 11 (permalink) Old 11-24-2010, 10:49 AM
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Id be more interested in the Coates CSRV system:
http://www.coatesengine.com/csrv.html
I should think that would work better with high RPM's, your flow wouldnt be limited by the lift of your valve, and i would think you could run much higher compression as there would be no hot edges.
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post #11 of 11 (permalink) Old 11-24-2010, 12:15 PM
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I would say that a spring is probably more efficient than you would think when it comes to absorbing, storing and then releasing energy back to the valvetrain. Sure some of that energy is lost because it's converted to heat but those loses are probably minimal.

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