CoedNaked |
03-18-2005 12:02 AM |
Yup, VVT-i - VAriable Valve Timing with Intelligence is what gave the 4.7 V8 more HP & Torque for 2005. In the Tundra/Sequoia it bumped it up to 282 HP and 325 TQ respetively and in the 4runner/LX 470 to 270 HP & 330 TQ (same engine though, but maybe they tuned the HP/TQ #'s for certain reasons on these vehicles).
Actually Toyota's VVTL-i which is similar to VVT-i, only it has a hydraulic "thing" in the cam that when you get into higher RPM's shifts cams to a higher RPM performance cam, is more closely related to Honda's Vtec than that of straight VVT-i. The VVTL-i is found on the 1.8 liter engine found in the Celica GTS, and the Matrix/Corolla XRS editions. The VVTL-i 1.8 gets 180 HP and 130 TQ, the VVT-i 1.8 gets 130 HP and 125 TQ. But the only catch is you gotta rev the crap out of the VVTL-i 1.8 to get into that different cam to take advantage of the extra 40 ponies. So I don't think, or at least I wouldn't imagine VVTL-i would have any application in truck engines. AT least not currently?
VVT-i will help gas mileage, increases Horsepower more so, torque slightly, but one of it's main benefits is it also really flattens out the torque & horsepower curves which means you'll have a higher percentage of your peak torque at lower rpm's.
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