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RT7CTA270-80HW

Special features

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White Dial Instrument Cluster

Featuring A Clean White Dial And Bold Red Pointers, Designed With A Dual Voltage Configuration Of 12V And 24V, This Product Is Suitable For A Broad Spectrum Of Marine, Automotive, And Truck Instrument Applications.

RT7CTA270-80HW_7 Color Backlight

7-Color Backlight Customization

8 Color Modes: Red, Green, Blue, White, Yellow, Cyan, Purple, and Cycling.

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Comprehensive Protection

Our Instrument Cluster Features IP67 Waterproof Protection, An Anti-Fog Lens, UV-Resistant Faceplate, And A Rustproof Bezel, Ensuring Durability And Clarity In Various Conditions.

RT7CTA270-80HW

Durable Instrument Clusters

Our Instrument Clusters

Designed For Durability, Featuring A Stainless Steel Rim, Clear Flat Lens, And A Tough ABS Housing. Perfect For Any Environment.

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Specifications and Dimensions of Gauges.

Our 85mm (3-3/8") Tachometer Have A Depth Of 40mm (1.6").

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Water Resistant Design

There Is A Waterproof Rubber Stopper On The Back Of The Product, Ensuring High Water Resistance.

Tachometer Setting

1. Tachometer Signal Input

There are three proper methods for obtaining the tachometer signal:

Method 1 – Gear-Mounted Speed Sensor (Hall Effect or Magnetoelectric Sensor) Install a speed sensor facing the gear shaft to obtain the signal.

  • Make sure the sensor directly faces the gear.
  • Maintain a gap of no more than 1.5 mm between the sensor and gear.

Method 2 – Ignition Coil Negative Terminal Connect the tachometer signal wire to the negative (-) terminal of the ignition coil.

  • No additional sensor is required.
  • If the reading is unstable or affected by interference, you may connect a 56 kΩ resistor (any wattage) in series with the signal wire.

Method 3 – Alternator W-Terminal Connect the tachometer signal wire directly to the W-terminal output of the alternator.

  • No additional sensor is required.

2. Speed Ratio Setting

Once you have confirmed the signal source, please make sure the tachometer's speed ratio is correctly adjusted.

The required ratio can vary depending on the signal source, even when using the same engine. The ratio is adjustable and can be fine-tuned according to your specific setup.

  • 4-cylinder: 002.0
  • 6-cylinder: 003.0
  • 8-cylinder: 004.0

3. Tachometer Filter

Tachometer signals can sometimes fluctuate due to electrical interference. In this case, we recommend using the appropriate tachometer filter to help eliminate unwanted pulse interference and stabilize the RPM reading.

  • No. 22 Filter – Suitable for single-coil or point-style coil ignition systems.
  • No. 24 Filter – Suitable for High Energy Ignition (HEI) systems.

Please select the filter that best matches your vehicle's ignition system and signal characteristics.

RT7CTA270-80HW_Fullset

The Entire Set Includes

  • 85mm (3-3/8") Electrical Tachometer x1
  • Tachometer Comes Equipped With A Fastening Ring

About this item

  • RaceTech Tachometer Gauge for Any Cars or Boats Instrument Cluster.
  • Measuring Range : 0 ~ 8000 RPM.
  • It has Precision Movement & Extreme Accuracy, with IP-67 Waterproof, Rustproof, Anti-Fog, UV-Resistant and Power off Memory Functions. Clear Flat Lens, 316 Stainless Steel Bezel with ABS Plastic Housing. Gauges Requires 12 / 24 Volt Negative Ground Systems.
  • Package Includes: Tachometer, Wiring Harness, Installation Instructions.
  • Since tachometers can sometimes show fluctuations, we recommend using a tachometer filter. This filter helps smooth out erratic signals by eliminating unwanted pulse interference, ensuring you receive the most accurate readings possible. The need for a filter may vary depending on the vehicle and ignition system.

  • If required, you can also purchase our tachometer filter separately here:

    1. https://www.ebay.com/itm/317237177944

    2. https://www.ebay.com/itm/317237144487

    Tachometer filters are available in No. 22 and No. 24 (a higher number indicates stronger signal filtration) to suit different vehicle ignition systems.

    No. 22 – Suitable for Single Coil or Point-Style Coil Ignition Systems.

    No. 24 – Compatible with High Energy Ignition (HEI) Systems.

    Please select the filter that best matches your vehicle’s signal characteristics to ensure accurate tachometer readings.

  • One-Year Warranty For Non-Human Factor Damage & Free Lifetime Technical Support. If you experience any issues with your product, please contact us through eBay first. Our team will be happy to assist you with troubleshooting or replacements.
  • To ensure reliable and faster shipping for our customers, we have stocked inventory within the United States. All customs duties have already been paid by us, so there will be no additional customs fees at checkout for items marked with the US Stock logo.