Thread: erratic tach Stewart Warner
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Old 05-12-2011, 02:14 PM
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Join Date: Oct 2003
Location: Queen Creek, AZ
Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection
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My SW tach only works when it wants to, otherwise, it reads more than actual...

I have the MSD 6AL and I have the MSD tach adapter box. 14 years ago I had the SW tach worked on by SW and also had the 6AL worked on by MSD and changed the tach adapter a couple of times. Nothing really made a difference and so I gave up eventually.

Maybe the tachs or the MSD stuff play better together today, 14 yrs later, but I just listern for when to shift. With the quick revs from my 540, I can't look at the tach anyway
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