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  #1 (permalink)  
Old 09-29-2008, 03:35 PM
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springless heads revolution or disaster?

i have been following the developement of springless heads. to me, stock spring type heads, the method is too antiquated. by now there is a better way. spring seat pressure can hold your car back , driving around, robbing your low end torque. could a springless head be a step in the correct(not neccesarily, right) direction?

pics coats type..


youtube video idling decuir head
http://www.youtube.com/watch?v=GXIdOTkJhEY


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Old 09-29-2008, 03:43 PM
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Spinn,

The idea has merit. They even used this technology back in the 1920's in steam engines.

Check out the photo gallery on this site for a user by the name of the "Inventor". He has some interesting works!
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Old 09-29-2008, 04:58 PM
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It sounds a bit noisy on the video .

I kept thinking adjust them valves!

But It might be OK with a Valve cover on it & in person.


Kool Idea



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Old 09-29-2008, 05:06 PM
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Ducati has been using a Desmo for decades. Ford built a set of heads for a sb( I believe) to test the idea. Desmos, which is what that one looked like, have 2 clearances, one for the opening cam and one for the closing. Springless valves are far from new. The examples shown are both attempts at revising existing ones. Duke has been refining theirs for a good period of time and seem to be pretty good. They are, however, on bikes that are high end with more than the usual maintenance.
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Old 09-29-2008, 05:14 PM
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duke has , ill check it out.

its still queiter than a mechanical cam.

i cant wait, if this is the future of racing..
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Old 09-29-2008, 05:20 PM
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20,000 rpm V8

renault
winding to 20k rpm

http://www.youtube.com/watch?v=AKyP1...eature=related

Last edited by spinn; 09-29-2008 at 05:26 PM.
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Old 09-29-2008, 05:59 PM
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Just watched the 20,000 rpm clip, absolutely incredible.
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Old 09-29-2008, 06:39 PM
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DAMN that is one pissed off chainsaw.

Be kool to see it in action where the rubber meets the road.

Too Kewl



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Old 09-29-2008, 07:13 PM
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I believe it was Willys-Knight? that had a sleeve valve 4 cycle automobile engine in the 20s. it was also in a truck, but I am not sure of the name. I had a salesmans sample desktop size cut-away working model of one...maybe I sold it or lost it. it had 2 sleeves running at different times, but the piston was in the middle of those sleeves. Slots would line up for intake & exh.


I have always wondered about the force required to run all the valves, even with stock springs.....makes you wonder how any cam can last at all with that force.


We are using 100+++ year old tech. There must be a revolutionary engine right around the corner....from an out of the box thinker.
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Old 09-29-2008, 07:29 PM
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Quote:
There must be a revolutionary engine right around the corner....from an out of the box thinker.
He he, yeah it's called an electric motor!

I love internal combustion, but man, it may be on the endangered species list soon.

It's almost like gun control for engines. We'll be a bunch of rouges with our 'smokers' stinkin' up the place.

They will not take MY guns, they will not take MY engines.
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Old 09-29-2008, 08:28 PM
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@4,99 a gal, its more full scale model building for me.

they have fleets worth of electric cars/scooters ready to change the world.
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Old 09-29-2008, 09:20 PM
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Quote:
Originally Posted by spinn
@4,99 a gal, its more full scale model building for me.

they have fleets worth of electric cars/scooters ready to change the world.
Maybe so & Maybe I will be willing to convert my old General Motors product over .


Maybe.

I like hydrogen better.



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Old 09-29-2008, 09:31 PM
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Only problem will be when we learn of a new energy source other than gasoline, we`ll have to find a way to be bullet proof as the billionaire oil tycoons that run this whole show will surely pay nicely to have us whacked.
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Old 09-29-2008, 09:31 PM
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This vid has a peculiar thing happening if you hadn't noticed. That being the suspended fuel cloud? over the bell mouth. Clearly fuel is being injected, and at the same time the air is entering the bell mouth feeding those 20k RPM cylinders. Interesting no?

Now, listen to this Renault F1 engine play We Are The Champions through the exhaust.
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Old 09-29-2008, 10:12 PM
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You got a leaky spark tube...
 
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Sorta off topic, but really cool:
http://www.youtube.com/watch?v=i_Npz...eature=related
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