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#376434 Jan 17, 11:33am
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2002 Toyota Celica GT
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2002 Toyota Celica GT
Joined: Sep 2004
Posts: 321
can anybody help me out here. i was talkin to one of my friends yesterday and of course we were talkin cars. and i was tryin to explain the differences in a GT and a GTS, but couldn't find a good way to explain lift. any help here guys?


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2004 Toyota Celica
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2004 Toyota Celica
Joined: Dec 2004
Posts: 466
The VVT-i portion of the system continuously varies intake valve timing throughout the rev range by hydraulically rotating the camshaft relative to its drive gear. Note that VVT (without the "i") did not do this continuously. The VVL portion of the system is similar to Honda's VTEC system, incorporating two distinct cam profiles. However, the actual mechanism is quite different. Both cam lobes operate a single wide rocker arm that acts on both intake or both exhaust valves. A needle-bearing roller on the arm follows the low-rpm, short-duration, low-lift lobe, forcing both valves to open and close on that profile. The roller design and roller bearings on the rocker arm pivot help to minimize valvetrain friction. The high-rpm, higher-duration, longer-lift lobe rubs on a hardened steel slipper follower mounted to the rocker arm with a spring. Even though the high-rpm lobe is pushing down further than the low-rpm lobe, the spring absorbs the extra movement. At 6000rpm, the ECU sends a signal to an oil control valve at the end of the camshaft that puts oil pressure behind a lock pin in the rocker arm, sliding the pin under the spring-loaded slipper follower, locking it to the rocker arm and forcing the arm to follow the high-rpm cam profile.

That's the technical description, but in plain english, the cam profile switch results in more air going in and a jump of 30HP.
1953434067-VVTLi.jpg

Last edited by GTS_Rosh; Jan 17, 2005 11:41am.

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Cold Warrior
2004 Toyota Celica GTS
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^ That's the mechanical description. In simpler terms, when lift kicks in, a more aggresive cam comes into play, resulting in the increased horsepower.

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2001 Toyota Celica
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2001 Toyota Celica
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According to what you feel...Lift is a shitty turbo.

Last edited by jyboygenius; Jan 17, 2005 12:30pm.

Enzo Ferrari " You may be a Ferrari owner; but, you may not necessarly be a Ferrari Driver."

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2002 Toyota Celica
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2002 Toyota Celica
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Lift is like a blowjob from a fat chick


Life is the sexually transmitted interruption of an otherwise peaceful existence...

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2low2slow
2002 Toyota Celica GT
2low2slow
2002 Toyota Celica GT
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^^ rofl i have no idea what that meas but oh well, what some people who dont know much about cars think by second cam kick in they think another camshaft, its all on one thumbsup still dohc tho


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A boats a boat, but the mystery box could be anything....Even a boat!

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2002 Toyota Celica
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dont worry about explaining it, just take them for a ride and it will explain itself


respect the gt-s

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2002 Toyota Celica GT
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Originally Posted by celicadragon
dont worry about explaining it, just take them for a ride and it will explain itself

i would... but i have a GT


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2002 Volkswagon Jetta GLS
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lol then.. get a shitty turbo and then take them for a ride

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2004 Toyota Celica
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Cold Warrior
2004 Toyota Celica GTS
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Nothing says you can't add a turbo onto an engine with lift, if you've GOT to have turbo.

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2low2slow
2002 Toyota Celica GT
2low2slow
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true, except the compression is already prety high


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2001 Toyota Celica
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^thats why you should get lower it. Lower the compression, then you can have higher boost from the turbo.

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ok...heres a GT:

vvvvvvrrrrrooooommmmmmm...

now heres a GTS:


vvvvvvvvvrrrrrrrrrrooooOOOOOOOOOOOOMMMMMMMMMMMMMMMMMMMMMM...

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Who's yo Daddy?
2000 Toyota Celica GT
Who's yo Daddy?
2000 Toyota Celica GT
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Posts: 1,363
be a newb and say its like honduhs vtech and he will be like oHHHH.

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Boobie Vision
2000 Toyota Celica
Boobie Vision
2000 Toyota Celica
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Originally Posted by sickcelica696
ok...heres a GT:

vvvvvvrrrrrooooommmmmmm...

now heres a GTS:


vvvvvvvvvrrrrrrrrrrooooOOOOOOOOOOOOMMMMMMMMMMMMMMMMMMMMMM...


hehehe that sounds about right rofl

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