Quote:
Originally Posted by serialk11r
I would think that gear driven camshafts are actually more likely because the stroke is short. It probably has around 35mm stroke, 75mm of connecting rod, so it's around 115mm to the valves from the crank, which I would think you can span with a single gear.
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Considering that even Toyota 1HZ and 1HD engines which are considerably larger had only 3 gears for the valvetrain timing (OHC), it makes sense.