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Message: <blockquote data-quote="BigBore96" data-source="post: 1112563" data-attributes="member: 17566">Sure,  though like I said they are crap.  And buying a ITSX for the purpose is a huge huge waste of money.<a href="http://hemorrdroids.net/torque-obdii-bluetooth-unit/" target="_blank">http://hemorrdroids.net/torque-obdii-bluetooth-unit/</a>But to clarify, the mechanical speedo is jsut a gear in the tranny.  NOTHING to do with those performance tests.   Those tests use G sensors and gps tracking generally.  Mechanical speedo doesnt matter.  But, the only part that is relevant for handheld tuners of any kind is they cannot change teh gear ratio/tire size of a mechanical speedo car.Your best bet if you want to know what the car does, is take it to the track.</blockquote>