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Old 01 Nov 2009, 11:01 am
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Default what does vtec do? and is it avaiable in my 1996 honda civic vti sedan?

hi, im a noob but i was wondering what does vtec do? i hear all this natually inspired technology but what does it do and how do u turn it on? and does my 1996 civic vti sedan have a vtec? also, how to i activate a vitec? (can always try my mums 04 accord (accure) euro to see what vtec does if my civic doesn't have it) thanks.
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Old 01 Nov 2009, 11:16 am
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i'm not sure exactly what it does to the engine but you get a power boost at around 5000 rpms...you can have it tuned to kick in whenever though. if you look at your engine it will say VTEC on the valve cover in big shiny letters if you have an engine with vtec.































you don't turn it on...it automatically kicks in when the rpms reach what it is tuned to kick in at
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Old 01 Nov 2009, 11:31 am
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The American-market Civic Si of 1992-1995 used a 125 hp (93 kW) / 106tq single-overhead cam D16Z6 VTEC engine, which enabled the car to hit 0-60 in 8.9 seconds; and a quarter-mile time of 16.1 at 86 mph.[10] VTEC activated on the intake side and not the exhaust side, which was the result of the spark plug blocking the area where the cam follower would be. Standard equipment included 14-inch steel wheels with plastic wheel covers, front/rear disc brakes, tachometer, dash clock, power sliding moonroof, cruise control, power mirrors, power steering, and driver's side airbag. In 1994, a passenger side airbag and rear speakers were added.































Again, different regions adopted different powerplants - the European and Peruvian Si's used a 130 hp (97 kW) D16A9 engine. At this time, however, the Si was not the most powerful variant of the Civic in Europe; Honda introduced to the region the Civic VTi, which featured a 160 hp (119 kW) B16A2 engine. The JDM version SiR carried an even more powerful B16A engine, which made 168 hp (125 kW). Civics in Japan using the SiR name included the EG6 SiR-II (hatch) and EG9 Ferio SiR (sedan) Civics as well as the CR-X Del Sol.































en.wikipedia.org
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Old 01 Nov 2009, 11:46 am
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It allows the engine to vary the valves opening and closing for the best performance and effiecency. Otherwise the valve opening and closing is determined by the valve springs and rocker arms and is constant.
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Old 01 Nov 2009, 12:46 pm
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Variable Valve Timing and Lift Electronic Control, It basically allows the motor to use 2 cam profiles, 1 for low end torque and a more aggressive one for high rpm power. Your vti should have a b16 engine which has a vtec motor. To activate it just floor the accelerator.
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Old 01 Nov 2009, 01:01 pm
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wow you have a euro accord. i always wanted to see one. anyway technically its a technology that honda developed first that uses the intake valves. it was first on the dual overhead cam engines where one is mainly closed while you drive at normal speeds so torque and gas mileage is increased. based on what engine you have(regardless if its doch or sohc, turbo or supercharged) when you hit a certain rpm(mainly 5000) both valves open up so you get a increase in power.































Yours should have it, and all the main companies now use it. as time went one, the new vtec i is used to also save alot more gas than compared to before. if you want a more technical view and actually see it at work then go here.































































hope i helped. i love vtec. when your speeding and you hit 5000, boom your gone.lol
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Old 01 Nov 2009, 02:01 pm
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iam not trying to offend anyone but all these answers are wrong... vtec doesnt give you low end torque at low rpms or any of that and your accord doesnt come with a b16.....VTEC was designed to give you better gas mileage without having to loose power. when vtec engages-its not a switch, it engages between 4500 to 5800 rpm depending what motor you have-anyway, when vtec engages it switches from the low cam you use at low rpm to a higher cam increasing air to fuel delivery, more power. you would know if you had vtec by simply looking at your valve cover or whenver your flooring it there would be a certaing rpm range where youll feel the increase of power like a little tug. and vtec isnt engaged by the motor(mechanically) it is engaged by the ecu(the computer) i hoped i was helpful and clarified a couple things for you
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Old 01 Nov 2009, 02:16 pm
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VTEC, or Variable Valve Timing And Lift Electronic Control, controls and varies valve times, making for a better and more aggressive fuel flow, opening and closing valves at the optimum time, rather than just on fixed setting. you dont have to turn it on, the switchover (kick in) will be around 5,500 rpm, you will hear it activate and feel a 'boost' similar to that of a turbo kicking in, just not as strong.































your sedan should be EK3, or the USDM equivalent, being a VTI it will have the B16A2 engine, which is a fantastic engine, it should have ''DOHC VTEC'' on the rocker cover. check the VIN plate, it will say B16A2 on engine code. VTEC engines, especially the B-series and K-series are some of the best, most capable for their size normally aspirated engines out there.































check this vid, this B16A2 is heavily modified, but on the bit where it films the speedo, listen for the VTEC switchover at 5,500rpm































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