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explaining lift #376434 Jan 17, 10:33am Jan 17, 10:33am
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explaining lift
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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Re: explaining lift [Re: JesterDallas] #376435 Jan 17, 10:38am Jan 17, 10:38am
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GTS_Rosh
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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
Re: explaining lift [Re: GTS_Rosh] #376436 Jan 17, 10:49am Jan 17, 10:49am
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ExNihilo
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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.


300,000 KM/Sec. Its not just a good idea, its the law.
Re: explaining lift [Re: ExNihilo] #376437 Jan 17, 11:30am Jan 17, 11:30am
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jyboygenius
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According to what you feel...Lift is a shitty turbo.


Enzo Ferrari " You may be a Ferrari owner; but, you may not necessarly be a Ferrari Driver."
Re: explaining lift [Re: jyboygenius] #376438 Jan 17, 1:14pm Jan 17, 1:14pm
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Lift is like a blowjob from a fat chick


Life is the sexually transmitted interruption of an otherwise peaceful existence...
Re: explaining lift [Re: jonnyess] #376439 Jan 17, 1:39pm Jan 17, 1:39pm
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eric_h
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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!
Re: explaining lift [Re: eric_h] #376440 Jan 17, 1:51pm Jan 17, 1:51pm
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dont worry about explaining it, just take them for a ride and it will explain itself


respect the gt-s
Re: explaining lift [Re: celicadragon] #376441 Jan 17, 2:09pm Jan 17, 2:09pm
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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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Re: explaining lift [Re: JesterDallas] #376442 Jan 17, 2:14pm Jan 17, 2:14pm
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JettaMan
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lol then.. get a shitty turbo and then take them for a ride


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Re: explaining lift [Re: JettaMan] #376443 Jan 17, 2:17pm Jan 17, 2:17pm
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GTS_Rosh
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Re: explaining lift [Re: GTS_Rosh] #376444 Jan 17, 2:33pm Jan 17, 2:33pm
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Nothing says you can't add a turbo onto an engine with lift, if you've GOT to have turbo.


300,000 KM/Sec. Its not just a good idea, its the law.
Re: explaining lift [Re: ExNihilo] #376445 Jan 17, 4:13pm Jan 17, 4:13pm
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true, except the compression is already prety high


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Re: explaining lift [Re: eric_h] #376446 Jan 17, 4:21pm Jan 17, 4:21pm
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Jaques
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^thats why you should get lower it. Lower the compression, then you can have higher boost from the turbo.

Re: explaining lift [Re: Jaques] #376447 Jan 17, 4:22pm Jan 17, 4:22pm
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sickcelica696
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ok...heres a GT:

vvvvvvrrrrrooooommmmmmm...

now heres a GTS:


vvvvvvvvvrrrrrrrrrrooooOOOOOOOOOOOOMMMMMMMMMMMMMMMMMMMMMM...

Re: explaining lift [Re: sickcelica696] #376448 Jan 17, 11:51pm Jan 17, 11:51pm
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be a newb and say its like honduhs vtech and he will be like oHHHH.

Re: explaining lift [Re: sickcelica696] #376449 Jan 18, 12:01am Jan 18, 12:01am
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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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