bubbleguinea Posted September 24, 2007 Share Posted September 24, 2007 they are accurate-within like 15 yards or something...but the older ones speed refresh rate is pretty slow.... never tried a new one.....hmmmmmm Quote Link to comment Share on other sites More sharing options...
Xander Posted September 25, 2007 Share Posted September 25, 2007 check your RPM's at speed and calculate from there. If you are running megasquirt you could datalog a run and get a really accurate rpm reading. Quote Link to comment Share on other sites More sharing options...
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