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30 degrees? :O I think the intake valve timing isn't changed that much, wikipedia says BMW VANOS varies +6 or -6 degrees. Exhaust timing on double VANOS varies a lot more though, I think up to 15 degrees or something.
Valve phase shift mechanisms are more or less all the same, it's a pretty simple thing. Anyone know how much of a difference electrical actuation makes? Seems like hydraulic isn't as optimized and possibly has "lag".
What I read on the direct injection thing was that the carbon builds up on the valves since there's no fuel to wash them, but Toyota D4-S has port injectors as well which would solve that problem right?
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