At what RPM VVT should be activated?

[127.0.0.1]

Originally Posted by jouna

i know some crazy yaris mo fo's and they think the vvt-i is like a vtec and they put the vvti to turn on with a button and it actually gives them 6 whp can somebody explain dis shit!

only VVT-i L is the V-TEC style with 2 cam lobes. it changes timing, lift, and duration
VVT-i L almost doubles horsepower if properly engineered.

plain old VVT-i is not Vtec. single cam lobe. it just changes timing.

[Parmas]

I don't think VVT-i as a source of power but more like smooth efficiency. Unplug the VVT-i cam plug and understand what happens. I just want to know that I have all setup right

This thread was created to get to know more on VVT-i tech and how it works aswell though.

[127.0.0.1]

Originally Posted by Parmas

I don't think VVT-i as a source of power but more like smooth efficiency. Unplug the VVT-i cam plug and understand what happens. I just want to know that I have all setup right

This thread was created to get to know more on VVT-i tech and how it works aswell though.

that is correct. not power, better torque curve on a small motor

for power... you -must- have V-tec, yo.

drop a corolla engine in there

[Parmas]

Originally Posted by 127.0.0.1

for power... you -must- have V-tec, yo.

Or VVT-Li is equivalent which is used on various new toyota engines

My mistake just recieved confirmation that ecu is capable to control VVT-i on a single vanos

Vanos definition : http://en.wikipedia.org/wiki/VANOS

[ddongbap]

Lol why would you call it Vanos?

BTW.

VVT-li is not the same thing as V-Tec. VVT-li is the similar to iVtec. But not the same.

Honda is EPIC at valve timing/adjustments. Nobody has been able to master this realm of crazyness.

[Parmas]

Originally Posted by ddongbap

Lol why would you call it Vanos?

VANOS (VAriable NOckenwellen Steuerung)

[ddongbap]

I know what Vanos is. Its also from BMW, not Toyota.

My previous post, I meant:

Nobody ELSE has been able to master this realm of crazyness.

[127.0.0.1]

Originally Posted by ddongbap

Lol why would you call it Vanos?

BTW.

VVT-li is not the same thing as V-Tec. VVT-li is the similar to iVtec. But not the same.

Honda is EPIC at valve timing/adjustments. Nobody has been able to master this realm of crazyness.

that is what I meant. it is the same as v-tec. and as far as no one else has been able to master this ??? ummm....well yes toyota has

[ddongbap]

Originally Posted by 127.0.0.1

that is what I meant. it is the same as v-tec. and as far as no one else has been able to master this ??? ummm....well yes toyota has

No they didn't. The VVT-Li failed, and they stopped production of it.

Vanos is NOT the same as vtec.

Valve timing adjustment is wayyyyyy different than valve lift+duration.

VVT-i = timing.

VVT-li = timing + lift/duration

VTec = lift/duration

iVTec = timing + lift/duration

Vanos = timing

[Tamago]

Originally Posted by ddongbap

No they didn't. The VVT-Li failed, and they stopped production of it.

oh did they?

then what engine is in this currenty available vehicle?

[spookz]

VVTL-i. =)

Tamago is right, the production of the 2ZZ-GE has been stopped for most markets, however Lotus continue to offer both the 2ZZ and the 1ZZ in their Elise and a supercharged version of the 2ZZ in their Exige.

[ddongbap]

Sorry, I should have said, Toyota stopped using that engine.

[rob323]

I just wish that the technology being used in F1 from ages ago would hurry up and get main stream. Solenoid actuated valves. Electronically adjustable lift, duration and timing, and no parasitic losses due as there are no camshaft shafts.