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Product # 3788

  • 2-5/8" (66.7mm)
  • Air-Core Air-Core
  • 0-5,000 RPM
  • Incandescent
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Since 1957, AutoMeter has set the standard in performance, accuracy and durability with their legendary Tachometers. The absolute pinnacle of engineering and technology, it’s no wonder AutoMeter can lay claim to more motorsports victories than every other gauge manufacturer combined. The patented air core meter movement, wound in house to exacting standards, can move the needle from 0 - 5,000 rpm in 333 milliseconds. An inaugural inductee to the Hot Rod Speed Parts Hall of Fame, no other tachometer on the market has had anything approaching its impact on professional racing. Built for a lifetime of service under the harshest conditions, this is the no compromise tach for no compromise builds. When you’re ready for the best, there isn’t another choice.

Hooking up a tach on a diesel can be challenging due to the lack of ignition system. Solutions up to this point have been complicated and temperamental. AutoMeter makes the process incredibly easy and affordable with this tachometer that utilizes an inductive pick-up. Simply attach the included pickup to the outside of the alternator and calibrate with a rotary dial on the back of the tach. It will work just about any engine with a crank driven alternator, not limited to only diesel applications.


Feature Points

  • Traditional incandescent lighting illuminates around the perimeter of the dial
  • 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system
  • Gauge kit includes alternator pickup, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation
  • AutoMeter’s race proven air-core electric tachometers provide quick and accurate readings with a needle so responsive it can go from 0 - full scale in 333 milliseconds

Sending Units

  • 5315

Bulb & Socket

  • 3220

Light Covers

  • Red 3214 & Green 3215

Mounting Hardware

  • Bracket Included
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Hybrid owners (toyota and lexus) in internet forums are looking for tachometers with easy install OBD2 plugin version. And this 5000 rpm display is perfect! I would buy one even if it costs $300-400 dolllars. Can you produce OBD2 plugin version?

Asked by: Marky
Hello, Thank you for your question. You would want to look at our Air Drive gauges or our DashLink (P/N: 6035). If you have further questions please give our tech line a call at 866-248-6356.
Answered by: Steve from AutoMeter
Date published: 2019-09-27

Referring to Cam's question and Joseph's answer.  What size hole would the tach fit in for mounting in a dash?  Can the optional bezels be used to compensate for a larger hole size?  Are there any drawings of the tach and bezels that show diameters? 

Asked by: Johnny B
Hi Johnny, thank you so much for contacting us. Unfortunately, as this tach was never intended for in dash mounting and lacks any provisions necessary to do so, we can't provide direct support on how to do it. There is no "right way" to accomplish this and it is not a recommended or intended application. If you are uncomfortable with fabrication work it would be best to seek the assistance of a professional technician. There is no appreciable difference in bezel sizes; you can see the published dimensions on figure C3 of this document: https://www.autometer.com/media/dimensions2014.pdf Hope this helps!
Answered by: Joseph At AutoMeter
Date published: 2018-05-29

Hello, can the gauge be mounted in a gauge hole of adequate size or does it have to bolted down?

Asked by: Cam26
Hi Cam, thank you so much for contacting us. While there are no provisions for in-dash mounting of this tach, it certainly could be done with a little creativity. I've personally used some weatherstripping and a hose clamp to accomplish this. While not the most elegant solution, it's functional and all behind the dash, so you don't see it. Hope this helps!
Answered by: Joseph At AutoMeter
Date published: 2018-02-19
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