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The xD is larger then the xA. Really until you drive one, it will be hard to see what you really think just by what we say.
Dual VVT-i on the other hand, I can tell you about.
On a car with VVT-i only the intake cam timing can be adjusted. The exhaust cam never moved and it worked just fine.
on Dual VVT-i, there is an adjustable gear on the exhaust cam now as well as the intake cam and they are adjustable independantly. It's supposed to improve efficiancy even further.
The Tundra 5.7V8 has 4 adjustable cam gears(2 per head)
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"Fools", said I, "You do not know, silence like a cancer grows.
Hear my words that I might teach you. Take my arms that I might reach you"
But my words, like silent raindrops fell, and echoed, in the wells of silence.....
Jason Johnston
Toyota/Scion of Des Moines
(800)342-7045
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