Calibrating a new Tach .... (board)
Thread Starter
Racer
Joined: Oct 2007
Posts: 270
Likes: 0
From: Chapel Hill NC
Calibrating a new Tach .... (board)
I recently installed a new tach board and filter.
My tach is certainly all over the place.
It is reading about 2K above where it should be, but at idle it is lower than it should be. When I shut the car off it's any body's guess where the needle will end at.
I did the resetting procedure of turning the ignition to the on position, then hand-setting the needle to 0.
Any idea what the deal is?
My tach is certainly all over the place.
It is reading about 2K above where it should be, but at idle it is lower than it should be. When I shut the car off it's any body's guess where the needle will end at.
I did the resetting procedure of turning the ignition to the on position, then hand-setting the needle to 0.
Any idea what the deal is?
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Racer
Joined: Oct 2006
Posts: 396
Likes: 3
From: Buffalo New York
Some replacement boards are not calibrated well. Mine reads about 1000-1500 rpm high, checked against my digital tach. Some guys have sent the board back 3 or 4 times until they got one that was correct. There is no adjustment possible, except for the needle.
