Variable Valve Or Cam Timing
Thread Starter
Drifting
Joined: Oct 2010
Posts: 1,972
Likes: 6
From: Chester Virginia
Variable Valve Or Cam Timing
Some of the new Ford engines, Porsche Panamera and others are not only either using or not using superchargers but they are incorporating variable valve or cam timing/opening height into single and double overhead cam engines to have more efficient engines. I went right to the ZR1 2011 website and couldn't find anything but supercharger and dry sump oil systems. Is this something that others are getting ahead of us on or is this something that GM just isn't marketing well but is already doing? It looks pretty complex but today's control sensors and precision must make it work. The Porsche Panamera four door sedan in V8 model can hit 196 mph and seats four.....'Does anyone know if this is in Corvette or coming or if it's not something a Corvette needs?
Drifting
Joined: Feb 2005
Posts: 1,879
Likes: 38
From: Los Gatos CA
The 90 ZR1 had variable timing; it used 2 cams per bank. The other cam came on at a certain RPM as I recall enabling high rpm/hp. There was a valet switch that disabled the 2nd cam. Hondas have had variable cam timing for many years. it's pretty commonn technology nowadays...
Burning Brakes
Joined: Oct 2008
Posts: 955
Likes: 50
From: Jersey Shore
Does the corvette need it? Probably not. The Z06 already gets close to 30 MPG with 505 HP and no VVT.
Thread Starter
Drifting
Joined: Oct 2010
Posts: 1,972
Likes: 6
From: Chester Virginia
That was my impression, that essentially the C6's had not tapped into vvt at all, favoring a more muscular though less efficient approach with superchargers and more multispeed trannies. I wonder if there is a C7 being developed what it's power plant will be like with the current forecast of gas prices in the $5.30 a gallon range over the next four years. It's $3.30 a gallon for premium here already. All those Chinese nationals buying cars and using gasoline!
