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914World.com _ 914World Garage _ Variable cam ... Has this been done on Type 4

Posted by: johannes Nov 24 2011, 08:03 AM

I have read that adapting the cam profile to the engine rpm gives more power / efficency / economy
Has something like that been made / tested on a type 4 ?

https://www.youtube.com/watch?v=0uiDmcPEekc

or

https://www.youtube.com/watch?v=5NUtwAaJcJw

or

https://www.youtube.com/watch?v=R14JOaA1Tjk

or

https://www.youtube.com/watch?v=iKo28HMLhK0

or

Posted by: Series9 Nov 24 2011, 08:35 AM

That Helical cam design is very interesting and original.

Posted by: 76-914 Nov 24 2011, 10:36 AM

Oh, You mean like this..............................

Attached Image

Posted by: johannes Nov 24 2011, 02:25 PM

QUOTE(76-914 @ Nov 24 2011, 08:36 AM)

Oh, You mean like this..............................

ha ha ha ! I saw this picture when making a search prior to post this thread.

Posted by: Jake Raby Nov 24 2011, 03:47 PM

The layout of the engine doesn't promote a true VVT arrangement. After tearing into and beginning development of the 2009 and newer Porsche DFI engines I have gained some knowledge and figured out some ways that would allow TIV VVT arrangements.

The downfall is no one could afford to buy it, so there isn't any use in doing it.