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TACHOMETER SIGNAL FILTER

TACHOMETER SIGNAL FILTER

Product # 9116
$25.95

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Description
Designed to help correct bouncy, or spiking tachometer operation caused by points or noisy ignitions.
ADDITIONAL NOTES

Feature Points

  • Works with all AutoMeter and Autogage tachometers
  • Releives jumpy/erratic pointer conditions due to a noisy signal
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Questions

Does this filter provide a “square wave” 0-5v signal suitable for electronic transmission signals?

Asked by: DBitt
Thank you for your question. This filter does not create any type of signal. It is installed inline and will clean up a "dirty" tach signal which may be produced by an older ignition.
Answered by: Zach from AutoMeter
Date published: 2019-03-21

I have a Bosch Sun Pro Tach that started fine and is now moved up to 3,000 rpm as it's base. Have a Petronics ignition (old school open roadster). A filter was suggested. would this work. Thank you

Asked by: Rick1948
When it comes to sensitive automotive electronic devices, they can be affected by sources of interference typically known as EMI and RFI “noise” which causes erratic operation. A marginal electrical ground connection only makes matters worse. Automotive manufacturers rely on unified ground connections directly to the chassis for all electronic and electrical components. A good solid ground for accessories to the engine block is fine but it’s absolutely imperative that a heavy gauge ground cable be installed between the engine block and the vehicles chassis.  A ground connection might look okay and feel tight but since all electrical connections rely on bare metal to metal contact, there can’t be any paint at the point of contact which could allow rust to form causing a high resistance or “floating” ground condition.  When used with a healthy tachometer and proper electrical connections, the AutoMeter Filter does an excellent job of removing electrical interference noise that gets induced into the electrical system. 
Answered by: AnalogDan
Date published: 2019-01-21

Will this work on my after market digital tach?

Asked by: jjkonye
I assume that you are experiencing needle bounce/ issues, yes it will work with any tac Be sure that your tac is grounded independently (attach your ground from the tac directly to the engine block. Do not ground to the chassis. (Everything else in your vehicle is chassis grounded and contributes to RF interference). RF is your major cause of tac problems if you haven’t changed spark plug wires you may need to change them to resistor wires as well, this is also another source of RF interferance.
Answered by: Sarg
Date published: 2018-09-24

Will auto meter 9116 work with GM hei and 1973 firebird oem dash tach. Currently tach read high

Asked by: Farmerick
Thank you so much for contacting us. Unfortunately our tach filter is designed to work with AutoMeter gauges. We haven't tested it with any other gauges so I'd be very hesitant to recommend it for use with your OEM tach. Typically this treats bounciness or erratic movements; it is not used for calibration issues which it seems like yours may be exhibiting. Sorry for the bad news.
Answered by: Joseph At AutoMeter
Date published: 2019-01-19

Will this work with original tacho and HEI-distributor? The car is a 1973 Chevy Malibu.

Asked by: Kenneth
It should, be sure you have a good ground connected to the block ( both tach and filter
Answered by: Sarg
Date published: 2018-02-14
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