Toyota's VVT-i vs. VTEC
11-22-2002, 03:41 PM
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Toyota's VVT-i vs. VTEC
What is Toyota's answer to the VTEC....VVT-i? Does that a feature that comes in the Solara V6's. From Toyota's website, it doesn't seem so....the V6's are just standard 198hp.
Thought I'd get some knowledge before going up against one. Every time a damn Solara pulls up, they always jet off when the light turns green like they wanna get some.
Thought I'd get some knowledge before going up against one. Every time a damn Solara pulls up, they always jet off when the light turns green like they wanna get some.
11-22-2002, 06:48 PM
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VVTL-I is the variable cam that you guys are thinking about... and yes.. im preety sure that it is comparable to Vtec.. but still.....
honda has been working on the VTEC concept for almost 10 years now... so they have it down to an art.
honda has been working on the VTEC concept for almost 10 years now... so they have it down to an art.
11-22-2002, 09:17 PM
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Toyota's VVT-i (variable valve timing with intelligence) is not found on the Solara or Camry 3.0 V6's. Instead, it's found on the Avalons 3.0 V6 which makes 210 hp. Toyota's VVTL-i (variable valve timing and lift with intelligence) found only in the 100hp/liter Celica GTS is more similar honda's vtec system.
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11-25-2002, 11:31 AM
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The VVTL-i is more advanced than VTEC.
VTEC only controls lift of cams. VVTL-i controls lift AND timing. It retards or advances the cam timing and lift continuously throughout the powerband to produce optimum results. VTEC is more like an on-off switch to go from smoother cam to aggressive cam only.
That's why after all these years the new Honda K series engines are using a more sophisticated i-VTEC which essentially adds timing variation to the cam equation.
So arguing the superiority of VTEC over VVTL-i is pretty pointless. You need to look at i-VTEC vs VVTL-i.
VTEC only controls lift of cams. VVTL-i controls lift AND timing. It retards or advances the cam timing and lift continuously throughout the powerband to produce optimum results. VTEC is more like an on-off switch to go from smoother cam to aggressive cam only.
That's why after all these years the new Honda K series engines are using a more sophisticated i-VTEC which essentially adds timing variation to the cam equation.
So arguing the superiority of VTEC over VVTL-i is pretty pointless. You need to look at i-VTEC vs VVTL-i.
11-25-2002, 11:36 AM
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Originally posted by Frogman
But they make an Echo I mean how can you get a toyota when they make something as ugly and stupid as that.
But they make an Echo I mean how can you get a toyota when they make something as ugly and stupid as that.
11-25-2002, 01:32 PM
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Aren't those two variants different: VVT-i and VVTL-i? The Celica GT has the VVT-i and the GTS has the VVTL-i? But in regards to my question...the Solara has neither?
11-25-2002, 02:04 PM
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your comparing apples to oranges.. intelligent valve time.. or I-VTEC.. what you see on the k20 motors in my opinion is far superior to any knockoff toyota system such as vvti.. but if we're going for the best system.. i'd have to say bmw's VANOS.. they've been making this system since '92 .. for lack of a better description.. i paste this
they're also making double vanos systems now.. and i have no clue what they do heh
VANOS operates on the intake camshaft in accordance with engine speed and accelerator pedal position. At the lower end of the engine-speed scale, the intake valves are opened later, which improves idling quality and smoothness. At moderate engine speeds, the intake valves open much earlier, which boosts torque and permits exhaust gas re-circulation inside the combustion chambers, reducing fuel consumption and exhaust emissions. Finally, at high engine speeds, intake valve opening is once again delayed, so that full power can be developed.
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