w201 m111 swap rev counter help

Patrick Ring

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w201 190e m111 swap
hi i've been on the hunt for a rev counter that will work on my m111 swap in the w201.
i haven't found anything on the forms yet to someone having an high idle reading in the rev counter

my car is idling around 750-800 i know this much but my rev counter is reading between 3-3.4k rpm as idle speed. i have adjusted the screw at the side of the rev counter to bring it down and now sits at 2.2k rmp which is something better.
i've also tried to take the reading from my old alt on the m102 motor and the reading is much higher at an idle speed

i'm wondering has anyone else had this issue and where did they find a fix?
thanks for your time
 

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