I hooked up a tachometer to the engine in my '64 a couple of weeks ago and it was several hundred RPM off from the tach in the car. Is this a common problem? Are there gears akin to speedo gears that can be changed to correct the problem?
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Re: C2 Tach Accuracy
Gain error can be reduced by a competent speedometer shop by alterning the flux of the head magnet. This can be done to either a speedometer or a C2 type mechanical tachometer, but will require that you remove the cluster in
order to remove the speedometer.
Duke -
Re: C2 Tach Accuracy
Mark:
Just curious. Did the error show that the tach in the car was reading too high or too low? Certainly a low reading is worse than one that is too high. There is more potential to damage the engine.
I may have a similar problem on my '64. I need to hook up my engine analyzer and check it out.Comment
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Re: C2 Tach Accuracy
Mark,
I'd bet that most of these mechanical tachs are off, mine included.Comment
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