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-   -   Inaccurate tach reading (http://forums.pelicanparts.com/porsche-911-technical-forum/644085-inaccurate-tach-reading.html)

Dr J 12-08-2011 07:49 PM
Inaccurate tach reading
 
My tach reads about 100 rpm over the actual value. Is there any way to adjust it? I haven't opened it up yet, but if anyone has done it, I would like to get feedback.

Tippy 12-09-2011 04:22 AM
Curious how you know?

Dr J 12-14-2011 02:02 PM
I have an LM-2 that shows tachometer values. Also, I remember in the past my mechanic stated that the tach was off, so I trust the LM-2.

DRACO A5OG 12-14-2011 02:12 PM
Can post a pic of the Tach at rest?

If it is 100 RPMs constant difference at all RPMs, you could just carefully tweek the needle to come close to where you want it, It requires you removing the bezel.

RoninLB 12-14-2011 10:39 PM
my original/never rebuilt reads 100 rpm low


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