Linusloh Clutched February 17, 2003 Share February 17, 2003 Hi, Seems like no one answer ur qn properly. I'll try to explain a bit.. MIVEC, if u read sunday times, they did give u the full name of MIVEC, I cannot remem everything, but it's just a fanciful name lah to a similar concept. Impt is getting the concept correct, then heck care all the fanciful names. Anyway...MIVEC, VVTi and VTEC is variable valve timing (VVT) which means the timing of the valve intake and output(exhaust) is electronically altered to give better performance of the cylinder...get it? VVL is variable valve lift...lift means the depth{paradoxically} of the valve opening, ie more air in/out of the cylinder. more air in means more power (if done right..something like turbo/supercharged engines) So far most cars now have VVT...including honda, mitsubishi, nissan, toyota...just diff names...usu the VVT kicks in at a certain RPM eg 4000 for the nissan sunny. ie 2 stage honda steam got i-vtec...3 stage, which means got kick in at 2 diff rpm, dunno wat. VVL? Got.., Not sure, but mebbe honda stream got, but only for the intake valve. got VVTL also...more advanced...but perhaps in some higher end cars. Hope tt helps. Quote Hi, anyone cares to talk more about these 4 differences in LAY MAN TERMS >.. what I know is that for Mivec and Vtec they are using 2 cam profile where at 5500 RPM (can be adjusted) it kicks in and open the 3rd cam to allow more fuel and air to combust ... is that true? But cannot find anything for VVL leh ... By the way anyone know which car in singapore using VTEC, Mivec, VVTi and VVL ? ↡ Advertisement Link to post Share on other sites More sharing options...
Vtim 3rd Gear February 18, 2003 Share February 18, 2003 Hi LinusLoh, The weblink provide by Esky have a more detail explaination on this, VTEC works differently from VVT http://www.mycarforum.com/forum/gforum.cgi...t=113928#113928 Link to post Share on other sites More sharing options...
Andrewkb Neutral Newbie February 18, 2003 Share February 18, 2003 Mitsubishi MIVEC - Variable Lift only Toyota VVTi - Variable Timing only Toyota VVTL-i - Variable Time and Lift Nissan VTC - Variable Timing only Nissan VVL - Variable Lift only Honda VTEC - Variable Lift only Honta iVTEC - Variable Lift and Timing Link to post Share on other sites More sharing options...
Andrewkb Neutral Newbie February 18, 2003 Share February 18, 2003 (edited) Heheee ... a bit of insight into iVTEC ... since I drive one Honda iVTEC uses: Variable Lift: 3 stage (Intake only) 1st stage - Economy ... one valve is disabled, thus a swirl in the engine is created like the Surbo. Total 12 valve operation for fuel economy during cruising 1st stage to 2nd stage is at 2200rpm 2nd stage - Normal .. 16V operation where the most torque is 2nd stage to 3rd stage is at 4700rpm 3rd stage - Wild cam ... more power lah Variable Timing: Unlimited Variable Intake: 2 stage. When below 4700rpm, the intake uses a longer route. Above 4700rpm, a valve closes and the intake uses a shorter route. Will find a website that explain in details and post here.... Edited February 18, 2003 by Andrewkb Link to post Share on other sites More sharing options...
Andrewkb Neutral Newbie February 18, 2003 Share February 18, 2003 (edited) More on the iVTEC and iDSI engine http://dwolsten.tripod.com/articles/apr02.html Edited February 18, 2003 by Andrewkb Link to post Share on other sites More sharing options...
Saaber Neutral Newbie February 18, 2003 Share February 18, 2003 Use advance editor so that the link is hyperlink...... Link to post Share on other sites More sharing options...
Andrewkb Neutral Newbie February 18, 2003 Share February 18, 2003 ok .. done-d Link to post Share on other sites More sharing options...
Saaber Neutral Newbie February 18, 2003 Share February 18, 2003 Link to post Share on other sites More sharing options...
Vtim 3rd Gear February 18, 2003 Share February 18, 2003 Link to post Share on other sites More sharing options...
Vtim 3rd Gear February 18, 2003 Share February 18, 2003 Hi Andrew, Did a test drive on the Stream 2.0 i-Vtec & all I can say it's consider almost full load There were 5 person onthe Stream: me (75kg) + Foo (60+kg) + Ahleong (80+kg) + Ahleong's friend (60+kg) + SE (90+kg) & all I can say is when using the Manual Shift, but if using Auto & Link to post Share on other sites More sharing options...
Andrewkb Neutral Newbie February 18, 2003 Share February 18, 2003 (edited) In fact, the car feels more energetic when full load ! Guess it's the Variable Timing that have adjusted based on the load. If the car has 2 person, the engine feels lethagic One thing for sure, with full load, the car can still climb up a slope without feeling breathless ! Edited February 18, 2003 by Andrewkb Link to post Share on other sites More sharing options...
Vtim 3rd Gear February 18, 2003 Share February 18, 2003 Link to post Share on other sites More sharing options...
Saaber Neutral Newbie February 18, 2003 Share February 18, 2003 The wonders of VTEC.... Link to post Share on other sites More sharing options...
Guyver 1st Gear February 19, 2003 Share February 19, 2003 Quote Mitsubishi MIVEC - Variable Lift only Toyota VVTi - Variable Timing only Toyota VVTL-i - Variable Time and Lift Nissan VTC - Variable Timing only Nissan VVL - Variable Lift only Honda VTEC - Variable Lift only Honta iVTEC - Variable Lift and Timing May i know what's the difference between the VVTi and VVTL-i?? Link to post Share on other sites More sharing options...
Andrewkb Neutral Newbie February 19, 2003 Share February 19, 2003 VVTi is only variable timing ... VVTL-i is variable timing and lift .... very similar to Honda's iVTEC engine. ↡ Advertisement Link to post Share on other sites More sharing options...
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