YOU Duh…
10 minutes of your time.
:io:
Fuck your Honda Vtec shit. Mitsubishi is where it’s at! MIVEC’s twice as cool as vtec! :lol: Har har. Get it?
no 
lol
lol
edit: u suck
troll?
Ugh someone find out who he is and kill him please.
I’m game.
:WTF: is with all the hate? KILL ME? Don’t you think that’s a lil strong and offending? sheesh. If you guys don’t like Honda’s just say so. All I was saying is I’m surprised more companies haven’t done their own VTEC. If you want to be constructive i’m all ears. I like fast cars and want to learn more. That’s why i’m here. Not to have people try to kill me.
Name me some companies that don’t have VTEC.
HEY STUPID FUCK
ALMOST EVERY COMPANY HAS SOME SORT OF VARIABLE VALVE TIMING
THAT WAS STATED MULTIPLE TIMES ALREADY
:bloated:
EDIT:
Fiat was the first auto manufacturer to patent a functional automotive variable valve timing system which included variable lift. Developed by Giovanni Torazza in the late 1960s, the system used hydraulic pressure to vary the fulcrum of the cam followers (US Patent 3,641,988). The hydraulic pressure changed according to engine speed and intake pressure. The typical opening variation was 37%.
In September 1975, General Motors (GM) patented a system intended to vary valve lift. GM was interested in throttling the intake valves in order to reduce emissions. This was done by minimizing the amount of lift at low load to keep the intake velocity higher, thereby atomizing the intake charge. GM encountered problems running at very low lift, and abandoned the project.
Alfa Romeo was the first manufacturer to use a variable valve timing system in production cars (US Patent 4,231,330). The 1980 Alfa Romeo Spider 2.0 L had a mechanical VVT system in SPICA fuel injected cars sold in the USA. Later this was also used in the 1983 Alfetta 2.0 Quadrifoglio Oro models as well as other cars. The system was engineered by Ing Giampaolo Garcea in the 1970s.[2]
Honda’s REV motorcycle engine employed on the Japanese market-only Honda CBR400F in 1983 provided a technology base for VTEC.
In 1986, Nissan developed their own form of VVT with the VG30DE(TT) engine for their Mid-4 Concept. Nissan chose to focus their NVCS (Nissan Valve-Timing Control System) mainly on torque production at low to medium engine speeds, because, the vast majority of the time, automobile engines will not be operated at extremely high speeds. The NVCS system can produce a smooth idle and high amounts of torque at low to medium engine speeds. The VG30DE engine was first used in the 300ZX (Z31) 300ZR model in 1987. It was the first production car to use electronically controlled VVT technology.
The next step was taken in 1989 by Honda with the VTEC system. Honda had started production of a system that gives an engine the ability to operate on two completely different cam profiles, eliminating a major compromise in engine design. One profile designed to operate the valves at low engine speeds provides good road manners, low fuel consumption and low emissions output. The second is a high lift, long duration profile and comes into operation at high engine speeds to provide an increase in power output. The VTEC system was also further developed to provide other functions in engines designed primarily for low fuel consumption. The first VTEC engine Honda produced was the B16A which was installed in the Integra, CRX, and Civic hatchback available in Japan and Europe. In 1991 the Acura NSX powered by the C30A became the first VTEC equipped vehicle available in the US. VTEC can be considered the first “cam switching” system and is also one of only a few currently in production.
In 1991, Clemson University researchers patented the Clemson Camshaft which was designed to provide continuously variable valve timing independently for both the intake and exhaust valves on a single camshaft assembly. This ability makes it suitable for both pushrod and overhead cam engine applications.[3]
In 1992 BMW introduced the VANOS system. Like the Nissan NVCS system it could provide timing variation for the intake cam in steps (or phases), the VANOS system differed in that it could provide one additional step for a total of three. Then in 1996 the Double Vanos system was introduced which significantly enhances emission management, increases output and torque, and offers better idling quality and fuel economy. Double Vanos was the first system which could provide electronically controlled, continuous timing variation for both the intake and exhaust valves. In 2001 BMW introduced the Valvetronic system. The Valvetronic system is unique in that it can continuously vary intake valve lift, in addition to timing for both the intake and exhaust valves. The precise control the system has over the intake valves allows for the intake charge to be controlled entirely by the intake valves, eliminating the need for a throttle valve and greatly reducing pumping loss. The reduction of pumping loss accounts for more than a 10% increase in power output and fuel economy.
Ford began using Variable Cam Timing in 1998 for Ford Sigma engine. Ford became the first manufacturer to use variable valve timing in a pickup-truck, with the top-selling Ford F-series in the 2004 model year. The engine used was the 5.4L 3-valve Triton.
In 2005 General Motors offered the first Variable Valve timing system for pushrod V6 engines, LZE and LZ4.
In 2007 DaimlerChrysler became the first manufacturer to produce a cam-in-block engine with independent control of exhaust cam timing relative to the intake. The 2008 Dodge Viper uses Mechadyne’s concentric camshaft assembly to help boost power output to 600 bhp (450 kW).
…
FUCK.
Jeez, sorry, it wassn’t stated before i made the OP, so back off. The question was answered, fine, but why all the personal attacks? I’m a person with feelings you know.
I’ve never been great at making friends, i thought this would be a cool place wto meet some other guys that were into fast cars and hoping I could learn something. That’s all. You guys don’t have to be so mean.
then quit being a stupid fuck and making stupid posts about “how cool vtAK is.”
And you wonder why you don’t make friends.
UUGGGHHHHHHH
DONE