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== Nissan Timing Wheels == Having looked at the Nissan Silvia and 200SX models (S12, S13 and S14) they all use a cam driven timing wheel with a speed sensor of 2degree resolution and portals of different sizes to denote the current cylinder. http://200sx.jagenheim.se/images/trigger.png The two degree marks would cause too much time to be spent servicing the interrupts, and as the sensor is cam driven we need only a missing tooth to tell us which cylinder is which, so a simple 36-1 image could be made: http://vems.hu/www.vems.co.uk/VEMSWB/NissanTimingWheelDims.gif And using another_trigger_tooth of 0x09 would provide a trigger event for each cylinder.
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