5 cyl interference

[Peter Berrevoets]

I don't know if everyone appreciates that the penultimate Ducati bevel drive
was a Desmodromic cylinder head whereby the valves were mechanically opened
and closed rather than opened and sprung shut. Unique in design and very
distinctive in performance and sound.

My $.02

Peter Berrevoets
1990 200TQ
Toronto, Canada
  -----Original Message-----
  From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of JanDebL at aol.com
  Sent: Tuesday, January 30, 2001 8:59 PM
  To: l.leung at juno.com; cobram at juno.com
  Cc: JanDebL at aol.com; quattro at audifans.com
  Subject: Re: 5 cyl interference


  Everyone appears to have valid observations.  The bevel gear drive on a
  Ducati was a work of art.  Like the 4 cam Porsche Carrera engines, I'm
sure a
  significant amount of HP was required to turn the shafts and gears and the
  belts are definitely cheaper and quieter alternative. Also the timing
  procedure was elaborate.  The new Porsches with the variocam seemed to
have
  solved the problem with a reliable chain and a tensioning system that also
  optimizes the HP & torque curves.  Too bad they are out my price range.
  Jan Lahtonen
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