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Registered
Join Date: Apr 2008
Location: Miami
Posts: 961
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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.
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1979 SC, Slant nose wide-body cab conversion. AEM Infinity EFI, COP, supercharged! |
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12-08-2011, 07:49 PM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,142
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Curious how you know?
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12-09-2011, 04:22 AM
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Location: Miami
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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.
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1979 SC, Slant nose wide-body cab conversion. AEM Infinity EFI, COP, supercharged! |
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12-14-2011, 02:02 PM
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Member 911 Anonymous
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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.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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12-14-2011, 02:12 PM
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Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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my original/never rebuilt reads 100 rpm low
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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12-14-2011, 10:39 PM
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Marble Grey
