are they on to something here? no springs?

sounds like my ducati

Makes sense!

Desmo

:supz::supz::supz::supz:

how about a little oil on them rockers. I cant imagine that they like being run w/o oil.

Bob

cool deal... i was wondering how long it wold take for someone to do this with a cam-in motor

What keeps the lifters against the cam lobes ? or did I miss something ?

Yullose said:

What keeps the lifters against the cam lobes ? or did I miss something ?

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Nevermind... I watched it again.

1badnova said:

http://www.decuirenginetechnologies.com/DET.html

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This has actually been around for a LONG time... I remember hearin about it in the 60's...
OLDDAWG

there was a prostock guy caught with those he lost 3 tenths going back to springs

FUCK YEAH!!!!!!!!!!!!


1" valve lift on my small block street car.........

That's pretty phuckin cool. Only question I have is if it's so great, why haven't more people tried it? According to that video, valve spring companies should be out of business by now.

SWeiser31 said:

That's pretty phuckin cool. Only question I have is if it's so great, why haven't more people tried it? According to that video, valve spring companies should be out of business by now.

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becouse its highly unreliable.. and super expensive to produce. otherwise yah, that technology has been
around since the 60s.

Sounds like a good ass idea to me. Not only more power, but not having to replace springs every season !

No prices though, hurry up and patent that thing dude!

Im with maliboost, didnt look like there was much oil coming out of those rockers...but kinda makes sense b/c with the springs gone you wont need as much oil there to cool them down...just enough to keep the rockers moving.

I talked to the guy responsible for that system at PRI. He is a ball buster. He had some other cool ideas like the internal supercharger. They are looking for people to invest in the deal. I think it could work.

F1 Tech! They have been doing it for years! Sounds like a great idea. Hope it is cheap? LOL!

Call me in 20 years when its cheap and reliable.

F1 uses pneumatic valves; The only way you can achieve 20,000 rpm for extended periods of time. I think I have also seen systems that use electro-magnetic-actuated valves. Ducati has used the Desmodromic system for along time.

springs are cheap and plentiful, they would just outlaw the shit anyway..

F1 uses conventional cam followers to open the valves, and pneumatic springs to close them. They do this because at extremely high rpm there is so much energy stored in conventional metal springs that the valves literally "bounce" off the seats when they slam shut. Electromagnetic valve actuation and pneumatic poppets were basically banned from the sport before a feasible system was ever fully developed.

This system is much more like the Ducati Desmo system, as was noted earlier in the thread. Until I see them buzzing it to 9500 on the dyno, I'll stick with springs.

actually, desmo and semi-desmo valvetrains have been around since the early 30's...deusenberg used a semi-desmodromic system in 1932.
http://members.chello.nl/~wgj.jansen/desmosys.html