Jimmy17
03-23-2003, 03:36 AM
just wondering if its ever been implemented on any sort of race engine before and how well it worked
by springless valvetrain i mean a cam that opens the valve and another cam that closes it and keeps it shut
getting serious valves/pushrods/rockers that can sustain high rpm isnt difficult right, its the springs needed for high rpm need to push with a lot of force and are heavy and not durable etc...
also would love to know about the 'springs' used in formula 1 if anybody knows about them, i understand they use air/gas/oil pnumatic springs?
Bud M
03-23-2003, 11:40 AM
Ducati motorcycle engines work as you described, with an opening and a closing cam on each valve. The call it desmdromic valve actuation .
Mindgame
03-23-2003, 01:34 PM
Yeah, that's desmodromic valve actuation.... not exactly a low maintainance system though.
This pic may help you see what's going on with the F1-type actuation:
http://community.webshots.com/photo/52891229/67322176UZiltQ
-Mindgame
I'd really like to see Coates Spherical Rotary Valves come to aftermarket production on a V8.
Mikey97Z
03-25-2003, 01:59 AM
Originally posted by jmd
I'd really like to see Coates Spherical Rotary Valves come to aftermarket production on a V8.
Oh yeah baby ... everybody take a look (http://www.coatesengine.com/eGallery/pages/RotaryValveSystem.htm)
Not only does it get rid of the springs, it gets rid of all the reciprocating masses!
Maldo
03-25-2003, 02:37 PM
Boy I would love to get rid of the valvetrain... image the power potential. Imagine you can program your valve train like a fuel injector … man that will be the day.
sb427f-car
03-25-2003, 09:31 PM
Originally posted by Maldo
Boy I would love to get rid of the valvetrain... image the power potential. Imagine you can program your valve train like a fuel injector … man that will be the day.
Sweet. Meaning you should theoretically be able to hold the motor @ peak TQ and peak HP @ ever RPM. :bow: now that'll be something else. I know that the GM Gen IV sb that's been rumored to debute in the C6 is not even supposed to have camshafts.
Jimmy17
03-25-2003, 09:50 PM
the c6 will first get something along the lines of an ls6 with a tad more displacement, and two cams.... still in block pushrod, this will allow for cam phasing
then later the c6 will get a camless engine
...or so i hear...
sb427f-car
03-25-2003, 10:28 PM
Originally posted by Jimmy17
the c6 will first get something along the lines of an ls6 with a tad more displacement, and two cams.... still in block pushrod, this will allow for cam phasing
then later the c6 will get a camless engine
...or so i hear...
Cool. When is the C6 supposed to debut?? Another year or two??