Cascade Crew

BigDaddyVu · Posted: Sat Feb 05, 2011 10:18 pm Post subject: springless valves

http://www.youtube.com/watch?v=GXIdOTkJhEY&NR=1&feature=fvwp

aaron_sK · Posted: Sat Feb 05, 2011 10:29 pm Post subject:

They've been messing with crap like that for years:

http://www.jalopyjournal.com/?p=8559

http://en.wikipedia.org/wiki/Desmodromic

Laughing

Alphius · Posted: Sun Feb 06, 2011 8:21 pm Post subject:

I think Ducati is the only manufacturer still using desmodromic valves. A friend of mine had a Ducati Hypermotard with that system.

QwkTrip · Posted: Sun Feb 06, 2011 8:29 pm Post subject:

If you want to see something really cool look at the Coates rotary valve head. They make such a big deal over the Ford small block swap and then never made it in production for any car. Morons.

http://www.coatesengine.com/csrv.html

Twilightoptics · Posted: Sun Feb 06, 2011 8:35 pm Post subject:

Cummins has been working on it for a while too.

I guess the biggest problem is that the solenoids that run the valves are too strong, and snap the valve stem off. Technology isn't quite there for widespread use.

Dewey316 · Posted: Sun Feb 06, 2011 8:59 pm Post subject:

For a while Lotus was working on an electro-hydraulic valve operated system, that allowed for fully computer controlled valve timing. Would be pretty interesting to have a fully programmable system for that. Could make a car idle like it had a small cam, but scream up high like it had a monster cam, with complete control in between.

Twilightoptics · Posted: Sun Feb 06, 2011 9:02 pm Post subject:

Definitely. Emissions will love it too. VGT was a huge step in that direction.

blue89 · Posted: Mon Feb 07, 2011 12:02 pm Post subject:

Coates is sweet! I remember seeing on a while back but it was not near as cool at Coates.

QwkTrip · Posted: Mon Feb 07, 2011 12:50 pm Post subject:

The Coates heads make a normal engine into a monster.