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Product # 3780

  • 3-3/4" (95.3mm)
  • Air-Core Air-Core
  • 0-8,000 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 - 10,000 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.

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 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
  • Compatible with most 4, 6, and 8 cylinder engines (2 - 4 pulse per revolution ignition signals) with points, electronic, and most 12V high-performance racing ignitions.

Bulb & Socket

  • 3212

Light Covers

  • Red 3214 & Green 3215

Mounting Hardware

  • 3209
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Hi, do you supply replacement bezels as I have damaged mine. Uk customer.

Asked by: Bugman125
Hi Bugman, thank you for the question. Since the bezels are actually machine pressed on, we do not offer them separately as an accessory or service item. We can replace a damaged bezel, but it would have to come into our factory in the U.S. for that service.
Answered by: Matt from AutoMeter
Date published: 2018-10-16

Is Tach. gauge Product # 3780 compatible with MSD CDI Street Fire ignition P/n 5520?

Asked by: Tanner
Thank you for your question. Yes, 3780 can be used with your MSD Street FIre ignition and will work in your application.
Answered by: Zach from AutoMeter
Date published: 2018-10-02

Is the tach waterproof? Want to mount outside on the hood of a 1972 roadrunner...if not do you sell any that are thanks!

Asked by: Mikey340
Hi Mikey, thank you for the question. We actually do not offer any completely waterproof tachometers. We offer a several Pro-Cycle and Marine tachometers that are water resistant on the front only, but nothing that would be recommended for outside hood mounting that would be exposed to the elements.
Answered by: Matt from AutoMeter
Date published: 2018-08-15

I have an older 3780 with the "long life bulb" and it has burned out. I found out the hard way that it is not serviceable, and ruined the aluminum bezel around the gauge face. Can AutoMeter repair the bulb and replace the bezel for me?

Asked by: Johnny5
Hi Johnny, thank you so much for contacting us. We're happy to help you with repairs to your tach. You can send it right to the factory here in Sycamore and we'll get you taken care of. Our s3ervice information form can be found here: http://www.autometer.com/media/Service_Form.pdf Hope this helps!
Answered by: Joseph At AutoMeter
Date published: 2018-04-11

Hi, Does the 3-3/4" PEDESTAL TACHOMETER come with the cup and bracket and if so is the bracket the shock bracket?

Asked by: Bill
Hi Bill, thank you so much for the question. Yes, the 3780 Tachometer will include the cup and bracket and it is the shock strap model 3209 that is included.
Answered by: Matt from AutoMeter
Date published: 2018-02-01

Can this tach be used on a 4 or 6 cyl engine

Asked by: tacomike45
Hi Mike, thank you for the question. This tachometer will be set for a standard 4 pulse per rev 8 cylinder out of the box, but is selectable between a standard 2 pulse per rev 4 cylinder, and a 3 pulse per rev 6 cylinder.
Answered by: Matt from AutoMeter
Date published: 2018-01-18

are these water or I should say weather proof ? going on a hood of a expedition suv.

Asked by: pt45
Thank you so much for contacting us. Unfortunately, while this tach is built to be incredibly durable, it is not weather sealed and only recommended for use inside a vehicle. All of our automotive tachs are designed this way. If you want to put a tach on the hood, we could special build you one of our Pro Cycle tachs (which are weather sealed) calibrated for the V8 in your Expedition. Here's a link to check out: https://www.autometer.com/gauges/pro-cycle.html#1&profile=products If you'd like to proceed with one like that, please give our team a call at 866.248.6356 and we can walk you through the process. We are open M-F, 8am - 5pm CST. Hope this helps!
Answered by: Joseph At AutoMeter
Date published: 2018-01-04

Hi I just asked a question about being able to change the bulb color on my Sport Comp 3780 would I be able to send my old tachometer back to you to have the bulb changed to green what kind of cost would this be

Asked by: Rumblrr
Thank you again for contacting us. On an older 3780, there is unfortunately not a way to change the bulb out for a green one, even at the factory. You can absolutely change it out on the current version. Sorry for the bad news.
Answered by: Joseph From AutoMeter
Date published: 2017-11-20
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