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Old 08-19-2012, 05:49 PM   #4
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Member#: 234407
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Smithfield, VA
04 Self-tooned


RomRaider lags back around 150-200 rpm as you have to give time for the data to transfer from ECU to laptop. This has been focussed before if you would have searched. The tach is a calculated measurment made by the ECU, etc.
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