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Old 08-18-2008, 09:11 PM   #170 (permalink)
whokilledthejams's Avatar
Join Date: May 2008
Location: Fredonia, NY
Posts: 322

Boxy Brown - '04 Scion xB
90 day: 35.48 mpg (US)
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From what a quick googling can tell me, VVT-i does not engage at any particular time. The engine decides on the fly whether to advance or retard timing given a combination of rpm, load, etc. It's similar to the newer iVTEC system on newer Hondas. For reference, Toyota's VVTl-i is closer to the older VTEC system that just engages automatically at a certain rpm.

Have you done any aeromods? My modest half-grille-block and Moon discs help me get a solid 37mpg (averaged over a tank, as I don't have an SG2 yet), at as-steady-as-I-can-hold 65mph, while pulsing the AC on and off every few minutes.
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