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CollapsedNut
02-01-2007, 02:08 PM
to quote from The Auto Channel:
The switch between regular and high-lift cams happens above 6,000 rpm, where the regular Corolla engine signs off. There is an insistent shriek and surge of horsepower from that point through the 7,600 rpm power peak until the rev limiter kicks in at 8,200.

Lol they kinda sound like there trying to appeal to honda people (yes they are people too) Vtak YO

hobbie2k
02-01-2007, 02:17 PM
*shrug* VVT is pretty much the same thing...

Playfortoday
02-01-2007, 03:00 PM
VVT discussion is hardly off topic. Off to gen disc with you.

ciento44
02-01-2007, 05:21 PM
Feels pretty much the same.... just like VTak with steroids.

vip09
02-01-2007, 06:39 PM
They were describing lift, not VVT.

hyoctane
02-01-2007, 07:13 PM
They were describing lift, not VVT.


^^ Yep, they were describing the "Lift" portion of VVTL-i

VVT-i = Variable Valve Timing with Intelligence was introduced by Toyota back in the early 90's, which varied the intake camshaft via oil pressure. Now the VVT-i utilizes both the intake and exhaust cam shaft on DOHC engines.

VVTL-i = Variable Valve Timing and Lift with Intelligence is similar to the above, with exception to the "switchover" to the larger cam lobes at 6,000 RPM which last to 8,400 RPM fuel cutoff... Well, that's 8,400 for the 2000-2001 2ZZ's like me!

But we all knew that! :hehe:

vip09
02-01-2007, 07:19 PM
^^ Yep, they were describing the "Lift" portion of VVTL-i

VVT-i = Variable Valve Timing with Intelligence was introduced by Toyota back in the early 90's, which varied the intake camshaft via oil pressure. Now the VVT-i utilizes both the intake and exhaust cam shaft on DOHC engines.

VVTL-i = Variable Valve Timing and Lift with Intelligence is similar to the above, with exception to the "switchover" to the larger cam lobes at 6,000 RPM which last to 8,400 RPM fuel cutoff... Well, that's 8,400 for the 2000-2001 2ZZ's like me!

But we all knew that! :hehe:

2zz only has vvt-i on the intake cam. Just to clarify for others.

CollapsedNut
02-01-2007, 07:29 PM
heres what brought this up. Im looking for a car to get in about 2 months and the corolla xrs is a much better deal than the cobalt ss I was wanting. Im on a corolla forum trying to learn about the vvtl-i and i think its a great thing. if you got a link to a place that can really break down the vvtl-i that would be super haha

Fuelish
02-01-2007, 07:31 PM
2zz only has vvt-i on the intake cam. Just to clarify for others. .....and to add my $0.02-less .... if I understand correctly, the 1zz (alas, my wife's humble 'rolla S) has vvt (variable valve timing, or some such), and the 2zz (no longer offered ???) has vvt-i (variable valve timing-"intelligent," i.e. "lift" ), no ?? Whatever ..... ;)

Trance4c
02-01-2007, 07:35 PM
http://en.wikipedia.org/wiki/VVTL-i

CollapsedNut
02-01-2007, 07:36 PM
http://www.cnorth.com.au/vvtli/vvtl_i.htm

This is a great link

CollapsedNut
02-01-2007, 07:38 PM
.....and to add my $0.02-less .... if I understand correctly, the 1zz (alas, my wife's humble 'rolla S) has vvt (variable valve timing, or some such), and the 2zz (no longer offered ???) has vvt-i (variable valve timing-"intelligent," i.e. "lift" ), no ?? Whatever ..... ;)

the XRS 2zz has vvtl-i and yes the xrs is no longer offered as of 07 or late 06

Playfortoday
02-01-2007, 07:44 PM
I don't care what has what. I didn't read the thread. I saw VVT and knew this is not an OT topic.

CollapsedNut
02-01-2007, 07:47 PM
well I started it in more of a funny sence about how the guy said the vvtl-i kicks in thats why i placed it in OT but its good, move away

vip09
02-01-2007, 08:46 PM
.....and to add my $0.02-less .... if I understand correctly, the 1zz (alas, my wife's humble 'rolla S) has vvt (variable valve timing, or some such), and the 2zz (no longer offered ???) has vvt-i (variable valve timing-"intelligent," i.e. "lift" ), no ?? Whatever ..... ;)

NO, you are incorrect.


1zz has VVT-i, the 2zz also has VVT-i. VVT-i means that the ECU controls the camshaft timing electronically. It is infinitely variable, unlike VVT in the early 90's 4A-GE.

The 2zz also has Lift. Hence, VVTL-i.

alltracman78
02-02-2007, 12:38 AM
It controls it electronically, but actuates it mechanically [via oil pressure].
And while it's theoretically infinite timing, in reality it is NOT infinite.
And it's not "camshaft timing". It's valve timing.

One, it wouldn't be practial. There is a limit to how much overlap you can run on an engine.
Two, it physically will not rotate 360*. The shaft only rotates a little over 90* IIRC.