VTec or VVTL-i?

[Guest]

in your opinion whats better?

[MGLax13]

isn't it all pretty much the same? VVT-i, iVTEC, MVTC and all the other crap companies have. It's all basically variable valve timing.

[kubi]

From a different thread... His opinion is VVTL-i. I'm not familiar with VVTL-i but it sounds pretty cool.

VTEC (Valve Timing Electronic Control I believe) is like a digital signal. On and off. It kicks in at a high rpm by opening up the cams more. It has a ridiculous gain but damages the overall performance (torque). EX: S2000. 10k redline I think, but daily driving needs around 4-5k rpm. The engine only lasts around 100,000 miles... hahaha GG super high compression.

VVT-i (Variable Valve Timing w/ Intelligence) is a continuous system that is ALWAYS changing the ports to produce the best torque / power curve possible but has the least max gain. It just has the greatest overall gain. Due to the gains, you can drive at lower RPMs while getting enough power to move yo' arse around and save gas and also extending engine life.

i-VTEC (VTEC + Intelligence) changes the whole thing by adding a step system between "kick ins". Instead of it only kicking in at 6K RPM, it will kick in once at 4000 and once at 6000 producing a double VTEC like feeling.

VVTL-i (VVT w/ Lift and Intelligence) has the same effects as VVT-i BUT BUT BUT BUT BUT BUT BUT the L stands for LIFT. The lift happens at high RPMs also to produce the VTEC like gain for horsepower. This will be the greatest racing technology due to the low end power gain and the high end horsepower gain. I think this is only found in the Celica GTS, Matrix XRS, and the upcoming Corolla XRS. It's the technology for sportier cars while VVT-i will probably remain the standard w/ "normal" sedans and such.

[TadS]

Read the tech FAQ guy. There is a very good, and simple explanation there.

EDIT: Apparently I'm not the only one that knew about that .

[MGLax13]

VTEC stands for "Variable Valve Timing and Lift Electronic Control" so it has that lift in it too, according to super street.

[kubi]

VTEC stands for "Variable Valve Timing and Lift Electronic Control" so it has that lift in it too, according to super street.

Someone needs to learn how to make acronyms, then.

[Jackass-Jeff]

VTEC stands for "Variable Valve Timing and Lift Electronic Control" so it has that lift in it too, according to super street.

VTEC = Variable Timing and Electronic Control

VVTL-i = Variable Valve Timing w/ Lift and Intelligence

I wrote a post on it a few weeks ago... I don't remem where... look so for it =P

[kubi]

I quoted the entire thing, it's right there!

[Jackass-Jeff]

I need new eyes? =P

[kubi]

That's ok, I need a new brain sometimes.

[MGLax13]

Someone for HOnda does need to make new acronyms, but thats what it stands for. Or else, it would be VVTLEC but VTEC sounds so much better. I'm like 95% positive that it's not just Variable Timing and Electronic Control.[/quote]

[Jackass-Jeff]

I'm like 95% positive that it's not just Variable Timing and Electronic Control.

The timing part means it starts at a specific RPM. VVT-i uses cam phasing where the cam retards to be at the optimal valve opening space

Variable Valve Timing Abbrevations:

BMW VANOS = VAriable NoOckenwellen Steuerung, German for "Variable Camshaft Control"
HONDA VTEC = Variable Valve Timing and Lift Electronic Control
HONDA i-VTEC = Intelligent Variable Valve Timing and Lift Electronic Control
MAZDA VVT = Variable Valve Timing
MITSUBISHI MIVEC= Mitsubishi Innovative Valve Timing and Lift Electronic Control
NISSAN CVTC = Continuously Variable Valve Timing Control
SUBARU AVCS = Active Valve Control System variable valve timing
TOYOTA VVT = Variable Valve Timing
TOYOTA VVT-i = Variable Valve Timing with Intelligence
TOYOTA VVTL-i = Variable Valve Timing and Lift with Intelligence

[HKSV6SLE]

someone has lots of time on their hands....hahahah