Basically, single VVT-i means the engine has variable valve timing on the inlet cam only, whereas the dual VVT-i has variable timing on both the inlet and exhaust cams. Therefore, in loose terms it is really only a modification to the cylinder head, so I wouldn't get too hung up on whether or not it has dual or single VVT-i. Ferrea Valves, Guides, Locks, Beehive Springs, Retainers, Cams (If VVTI get a BC 264 or 272), shimless buckets, and a PROPER head machinist and you'll be set. Remember, if you get one component thats Ferrea in your head (ie; valves), you should pair it with everything else Ferrea in the head (ie; springs, retainers etc). See more. EventH. 1st Gear. June 21, 2006. Donno about which being more advanced. The old Dual VVTi Altezza produce some 210hp (6MT) from 2L with 21kg.m torque. That is nearly a Honda "R" engine spec. The new Dual VVTi V6 2.5L in the Mark X (6AT) does 212hp from 2.5L but had 26.5kg.m torque at just 3800rpm. The difference between the 1GR VVT-I actuators of year models 2003-2004, and 2005-2015, for the SINGLE VVT-I 1GR (NOT the dual VVT-I 1GR) is their pick-up design. Visually obvious in the two pictures. The first picture is what the intake cam gears look like, on the '05 Tacoma to '15 Tacoma. The sensor which reads it is different from the sensor
272. Gender: Male. We know the 2016 2.7l 2tr-fe engine in the 3rd generation tacoma has been changed. We know the compression ratio has been increased from 9.6 to 10.2 and the engine now has variable valve timing on the exhaust side giving it DUAL vvti status. Toyota leads us to belive that the new engine has (been detuned?) to the exact

The 1.5-liter Dual VVT-i engine is rated at 106hp and 140Nm, while the 1.3-liter Dual VVT-i motor produces 98hp and 123Nm. By comparison, the previous NZ-FE engines had the following output: 107hp and 142Nm for the 1.5-liter, and 85hp and 122Nm for the 1.3-liter.

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single vvti vs dual vvti