LexFather

Very interesting read. Seems VVTi is the best but more expensive to make. Hence our costlier cars.

http://www.geocities.com/gkurka2001/...m#Nissan%20VVL

XeroK00L

Thanks. Nice find, but correct me if I'm wrong: according to the article, Toyota's VVT-i is actually the simplest and cheapest mechanism of all.
And while you might have been talking about Toyota's VVTL-i, the one that's regarded by the article as the "most sophisticated" type of VVT, the "best", it says, is Rover's VVC system. The one with the most output gain, again, is not Toyota's VVT-i but Nissan's VVL, according to the table in the last page of the article.

Also, as far as I know, the VVTL-I has only been used on 2ZZ-GE, found on the Celica GT-S, Corolla XRS, Matrix XRS and Elise. Not even one Lexus model uses this more "sophisticated" system yet for some reason.

VVT-i

The new 06 GS300 will have this system.

LexusLuver

I always though VVTL-i is reserved for inline engines.

The Avalon's 3.5L has dual VVT-i which is similar to Double Vanos...and VVT-i is like Vanos.

CK6Speed

iTrader: (1)

Too bad the article did not include and compare Honda's i-VTEC system. It appears Honda's i-VTEC is very similar to Toyota's VVTL-i. In the older Honda VTEC system it did not change the entire camshaft angle (I believe Toyota calls it Phase Angle in the VVT-i system). The i-VTEC now does that and can vary it up to 50 degrees compared to Toyota's 60 degrees in the VVTL-i system. Both now have2 stage varibale lift as well as continous cam timing control (Again 50 degrees for i-VTEC and 60 degrees for Toyota's VVTL-i) However, Honda also has the other VTEC 3 stage variable lift system described in the article, so one could assume that someday in the future the i-VTEC system may also get a 3 stage valve lift system as well.

Falcon LS

That was an interesting read. Thanks!