What Is 'lift'?

[Rolla_SR]

Could anyone tell me what 'Lift' actually is? I mean I know it kicks in round 6.2k revs through to 8.5k...

... Is it the same as VTEC in the Type R... My mates trying to get me over to the CTR group, but to be honest I can only see one way for me and thats hopefully a CTS-C for my 21st :D

[Norfolk n Chance]

It's the feeling of the engine swithing to the racing cam and providing around an extra 50bhp B)

Don't buy a chav-mobile!!

A CTS-C is much quicker ;)

But Lift isn't as noticeable...

[cfc1]

That is a picture of a couple of camshafts and the cams (the little triangle shaped bits)

"Lift" is a high lift cam.

The 2zzge engine has 2x cam profiles, the profile refers to the pointy part of the cam... 1 profile in normal driving and another profile when you hit "lift".

The profile of the cam dictates how long both the intake valves and exhaust valves stay open for... obviously the longer the intake valve is open the more fuel mixture gets into the engine and the longer the exhaust valves are open the quicker the burnt gasses can escape. The easiest way I can think of to explain lift is to say that the pointy bit of the cam isn't as pointy on the "lift" profile which in turn keeps the valves open longer.

It can get a little technical trying to describe what actually makes it work... but I found this and thought it was an amusing way to describe it.

I'm explaining this to you under the assumption that you understand how a Valvetrain works. If not this will mean absolutely nothing to you.

There are a couple different names of Variable valve timing when it comes to Toyota's VVT, but I'll just do the basics because it's just easier. Using what I've learned from a lot of Toyota literature I've adapted their explanation to the best of my abilities in order to summate it for the people who can't understand their explanations... because I barely could.

VVTL-i = Varial Valve Timing with lift and intelligence

VVT-i continuously varies the intake valve timing throughout the whole RPM range by using an oil pin to hydraulically rotate the camshaft in accordance to the drive gear, while VVTL-I has that cool lift mechanism.

VVTL-I works like this: There is a needle bearing roller on the arm follows the low-rpm, shorter-duration, low-lift lobe forcing both valves to open and close on that cam profile. We'll call this lobe, little johnny.

The roller bearings and design of the roller itself on the rocker arm pivot around to reduce the amount of valvetrain friction, which is good because that means less wear on the valvetrain and will only delay the inevitable of having to buy a new head .

The high-rpm, higher-duration lobe with a longer lift rubs on a hardened steel "slipper follower" mounted to the rocker arm that has a spring on it. We'll call this profile, Timothy. Even though Timothy is taller and pushes down further than little Johnny, the spring absorbs the extra movement and all is well within the kingdom, because Johnny isn't working quite yet.

This would be like if little Johnny and Timothy were jumping on Fat albert and Johnny was jumping on his face and Timothy is jumping on his stomach. Even though Timothy is taller and bigger, his weight is being absorbed by fat albert's soft and squishy stomach. So in this case Timothy doesn't receive the same amount of feedback as Johnny would.

Usually at around 6000 rpms (this is true for the 2zzge) the ECU will send a signal to an oil control valve at the end of the camshaft that pressurizes and engages a locking pin in the rocker arm, sliding the pin under the spring-loaded slipper follower.

So to put it into perspective... let's say Johnny and Timothy were jumping on fat albert and all of a sudden they started jumping faster and faster until they hit 6000 jumps a minute. At that point Fat Albert would tense up his stomach and Timothy would be hitting the same amount of feedback as Johnny would. Now both Timothy and Johnny would be equally hitting Fat Albert at the same time with the same amount of force being fed back into the rebound of the jump.

Once the pin locks in place this forces the rocker arm to follow the high cam profile (timothy) instead of the low-cam profile (johnny). And thus Fat Albert becomes squished at a higher impact rate causing him to inhale more air and expediate it quicker. Just like the 2zzge!

[KPARRIS-JONES]

Fantastic explanation!

I have learnt something today for the first time ever!

[cabcurtains]

Lift is when the chump in a Diesel (No offence :P ) goes for the next gear thinking they have you and you suddenly you just disappear in a chorus of screaming engine

[KPARRIS-JONES]

Sounds fun!

Maybe some day I will invest ina Tsport or CTS-C, despite saying this in this topic!

[-T- Sport]

Lift is life.

End of story. hah...

[Bizarra]

That was excellent

I always wanted to know what "Lift" was , being technically retarded, & was afraid to ask.

Haven't got it on mine :( as I would suspect it hadn't been invented then

[KPARRIS-JONES]

That was excellent

I always wanted to know what "Lift" was , being technically retarded, & was afraid to ask.

Haven't got it on mine :( as I would suspect it hadn't been invented then

Just noticed that I saw a rolla exactly the same as yours on the way back from London. Same colour and wheels ect.

Right POS....

Kidding

[Rolla_SR]

Lift is when the chump in a Diesel (No offence :P ) goes for the next gear thinking they have you and you suddenly you just disappear in a chorus of screaming engine

Ha there isnt anything wrong with a Diseasel!!! Although yes driving down the M5 a CTS decided to play games with me and give nothing but false hope

[farhanali89]

Lift is when the chump in a Diesel (No offence :P ) goes for the next gear thinking they have you and you suddenly you just disappear in a chorus of screaming engine

Pretty well said !

[KPARRIS-JONES]

Lift is when the chump in a Diesel (No offence :P ) goes for the next gear thinking they have you and you suddenly you just disappear in a chorus of screaming engine

Ha there isnt anything wrong with a Diseasel!!! Although yes driving down the M5 a CTS decided to play games with me and give nothing but false hope

Aaaahhh memories of false hope!

Such as my dad keeping up with a Megane sport and it then roaring away!

On the track of course!

[Bizarra]

That was excellent

I always wanted to know what "Lift" was , being technically retarded, & was afraid to ask.

Haven't got it on mine :( as I would suspect it hadn't been invented then

Just noticed that I saw a rolla exactly the same as yours on the way back from London. Same colour and wheels ect.

Right POS....

Kidding

If POS translates as I suspect, I'm glad you are only kidding You can insult me, my cats, my house & children with impunity, BUT............ :lol2:

[KPARRIS-JONES]

Spoken like a true car lover!

[farhanali89]

Lift to me has become a way of life....i use it once everyday, somedays when i dont use it, i get a bit pedal happy a few days and use it continuously. However there is a line i need to draw between using lift. It is addictive and fun but once your in lift you just want to keep shifting up a gear to stay in that kick. Some top s_it i tell u