194 Pages of pure Porsche heaven

[/////AMG]

WOW

2004 Model Line

http://216.73.106.70/Porsche%20PM-MJ_2004_GB.pdf

Gotta love: Auto-Spies

[Alpine Autowerks]

Sweet...and thank you

[92 Teg-B18A]

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great find!

[blacklade]

thanks for the link

[littledan]

VarioCam Plus
Two Engine Concepts in One
Porsche offers VarioCam Plus on all models throughout the range. Camshaft adjustment
on the intake side (VarioCam) is supplemented in this case by valve lift control also on the
intake side (Plus). Featured for the first time on the 911 Turbo, this soophisticated system
is able to optimise output and performance, on the one hand, while at the same time reducing
fuel consumption and exhaust emissions, and improving running smoothness and refinement,
on the other.
The valve adjustment system is made up of switching cup tappets on the intake side of the
engine operated by an electrohydraulic 3/2-way switching valve. With two different cam
contours on the intake camshaft, the engine always runs on the appropriate lift curve, with
the cams switching from one to the other. To be specific, the cup tappets are made up of
two interacting tappet elements locked one against the other with the help of a bolt. This
creates a direct link, first, between the inner tappet and the small cam, and, second, between
the outer tappet and the large cam. A hydraulic compensation unit for valve play is integrated
in all cases in the tappet’s force flow line.

is porche using vtec now that the patent has expired??

[ExtremeSi]

It's actually Porsche's own variable valve timing system that they have been using for a few years now. I think it's called variocam and it's similar, but not exactly the same as Honda's vtec.

[Alpine Autowerks]

just read the patent abstract, it was for o2 sensor degradation mapping in a engine with variable cam phasing. the mechanical element was secondary to the patent.