TwinTurbo.NET: Nissan 300ZX forum - Yes it's calibrated.
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Subject Yes it's calibrated.
     
Posted by DVDBURN (MD) on October 15, 2010 at 8:06 PM
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In Reply To well i still have the same Q as i did last time i posted posted by fst300zx on October 15, 2010 at 06:33 PM
     
Message You have to modify the speedo board. There's a variable resistor that you change with a larger value and a fixed resistor that you change to a lower value. Then you inject a known signal level for a specific MPH and adjust the variable resistor for the speed which matches the signal. The 1991+ years are a little different but you end up basically doing the same thing.

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