Since the 2007 Titan has this technology I thought it would be nice if we understood it.

Valves control the flow of air and fuel, into the cylinders and exhaust out of them. When and how long the valves open (timing) and how much the valves move (lift) both affect engine efficiency.

Optimum timing and lift settings are different for high and low engine speeds. Traditional designs, however, use fixed timing and lift settings, which are a compromise between the optimum for high and low speeds. VVT&L systems automatically alter timing and lift to the optimum settings for the engine speed.

Potential Efficiency Improvement of this is 5%.

By the way, General Motors patented the first variable valve timing and lift or smart valve system in September of 1975.

This link will take you to a hardcore PDF on this.

i remember when i had my civic ex that had VTEC! whenever i hit about 5200 rpms you can literally hear a change in the sound of the engine and feel a rush of power, kinda like a mini-turbo! it was cool, but d@mn little 4 cylinder had to be pushed at high rpms for power!!

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PRGbuilt
born 12/3, purchased 1/4 '04 Smoke SE KC PRG MT kit, CST spindles, PRG Spec'd SAWs 2.5" C/Os w/Eibachs, SAW Airbumps, CST carrier bearing, 37x12.5x17 Pro Comp Extreme All-Terrains, American Racing Mojave Teflons, HID low beams, Magnaflow custom exhaust, Injen CAI Filter, ID FRP prerunner fenders, front windshield tinted, Optima Yellow Top, Pioneer AVH-4100DVD w/ipod adapter connected to 80gb iPod, Sirius, HD radio tuner, Hertz 6.5" Components front, Boston 6.5" rear, Boston G1 10" subs, tech12 sub enclosure, Alpine amps, Eclipse BEC106 backup camera, TrueTrac, regeared from 2.94s to 4.11s, CTW TT prerunner fiberglass bedsides, Giant Motorsports under axle conversion kit w/64" deavers (21" rear travel) with Giant custom built rear bedcage and KING 3.0 bypass shocks...

VIDS!!! http://vimeo.com/groups/h00ligan/videos

My YZ80 had a high RPM powerband that was very impressive .... is that kind of what VVT does for a 4 stroke ??

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'04 SexySilver KC XE ....120k miles....the usual mods.

Hmmm. This seems to be the subject of the week!
I went to the local dealer and checked out the new 07 Titans and they now have the VVTi.
I got me a little video of it right here! http://videos.streetfire.net/recentv...3c0143dba4.htm
Listen closely at the end of it and you can hear the retard dealer trying to tell me that the Crew Cab has 506 HP and the King Cab has 317HP! LOL

Damn work blocking streaming media!!

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2010 Smoke Crew Cab 4x4 w/ SE Value Truck Package

Mods:

Extang Trifecta Folding Tonneau Cover ~ Nitto Terra Grapplers LT275/70/18 ~ 15% Tint ~ Aries SS Bull Bar ~ Warn W650D Wireless Driving Lights ~ Magnaflow OEM muffler swap ~ SuperChips Cortex 93 Tune ~ Volant Powercore CAI ~ 2* Timing Advance

I still like the comments.

This looks like confirmation.... a TSB on it!

http://www.nissanhelp.com/Ownership/.../NTB06-079.htm

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05 KC SE Smoke
01 Suzuki 600 GSF
88 Fiero 2M4

I thought this was new on the '07 Titans? This TSB is listed under the '04 TSBs
1996-2007 ALL NISSAN MODELS; DTC FOR VARIABLE VALVE TIMING CONTROL FUNCTION

Also one of the engines listed is the VK56

Well my Titan has one new rattle and it's been doing it for about 2 months and only under a slight engine load under the hood.
Sounds like this rattle from the TSB!

Attached Thumbnails

 

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3-29-05 Born ...4/09/05 Adopted... SEKC...
4 x 4 Off Road with Big Tow and no E-loc... Blizzard...Graphite/Titanium Interior, Popular Package, Bench Seat.

Bilstein front/rear shocks, Deaver Mini-Pak Springs, Total Chaos Shackles, Hellwig Anti-Sway Bar, TrueTrac, Mag-Hytec "Honeypot", HK Axle Vent Mod, Frozen Rotors-Hawk Pads.
ARE Z shell, OEM bug/rock/gut deflector, Lund AVS Ventvisors, Bushwhacker- notched-Fender Flares, Burtman Stainless Steel Titan Door Sills, Black Vinyl Door Edge Molding on front doors and vertical sides of Tailgate, Spoiler Direct Chrome Tailgate Trim, Utilitrac System, OEM Dual Lower Sliding Trays, OEM under-seat-storganiser, Silver Star Low Beams, White Night Backup Lights, CT Windshield Sun Reflector, Drawtite Activator II trailer-e-brake control, Super-Z-Winter Traction Cables, Dueler AT REVO Tires-3rd set, Nitrogen in tires, NISSAN I-POD adapter, Bosch Icon blades, Optima Red Top Battery.

Amsoil: SEVERE GEAR 75-140W Synthetic In Rear and Front Differential, ATF Synthetic in Transfer Case,
Signature Series 0-30W synthetic engine oil, EAO13 oil filter, EaA104 Nano-fiber engine air filter
6 x 10' low bed/rails trailer with E-brakes, 100 year old rebuilt 4,000 lb. road roller/packer

JFK on Climate Change/Energy Revolution http://www.youtube.com/watch?v=J8dLHZ6jKFc
JFK JR. "We Have the Capability and Technology to Eliminate 100% of our Needs for Persian Gulf OIl" http://www.youtube.com/watch?v=Heku9oTLysg
"PEACE TO THE PEOPLE OF ALL NATIONS" The TRUTH is still EVERYWHERE...I said this ~!!!~

It was applicable to all Nissans with VVT. The vk56 is just one of them now. I think the qx56 has always had it?

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05 KC SE Smoke
01 Suzuki 600 GSF
88 Fiero 2M4