Interesting new (to me) valve technology

[Heath Vogt]

Yes and Yes.  Piston too heavy with too long of stroke
(and rod ratio plays in too) and the forces are too
great at higher rpm to hold together.  On the valves,
Ducati uses cams to close the valves rather than
springs (Desmonic Valves?).  You need both to pull
rev's to the stratosphere.

Heath

--- "geo3@earthlink.net" <geo3@earthlink.net> wrote:
> BiH wrote:

> >It's piston size and stroke more than valve design
> that determines redline.

> Is that right?  I always thought valvetrain
> harmonics were more of an
> issue.  The only reason we have 18,000 rpm F1 car
> engines is because of the
> pneumatic valves.

=====
Heath Vogt BSME
'69 Baja Bug - Brutus "the wonder bug"
'01 Isuzu Trooper
'98 Nissan Sentra SE