AutoMeter Sport-Comp II

2010–2025 Universal Automotive Electrical System Monitor

Part #: 3691

Overview

The AutoMeter Sport-Comp II 2 1/16-inch Digital Voltmeter is an essential gauge for automotive enthusiasts who want to keep a close eye on their vehicle's electrical system. Designed for both street and race applications, this high-precision voltmeter provides real-time voltage readings with exceptional accuracy and smooth needle movement. Whether you're monitoring a daily driver or a high-performance race car, this gauge helps ensure your electrical system remains healthy and operating within optimal parameters.

With its ultra-smooth needle and precise resolution, the Sport-Comp II voltmeter allows you to easily track voltage fluctuations, helping you detect potential issues before they become serious problems. Its compatibility with a wide voltage range from 8 to 18 volts makes it suitable for nearly all street and race vehicles with negative ground electrical systems. Installation is straightforward, thanks to the included direct plug-in wiring harness, making it an ideal upgrade for enthusiasts seeking reliable, real-time electrical monitoring.

Key Features

The AutoMeter Sport-Comp II Volt Meter is built with performance and durability in mind, offering several key features:

• High-precision digital stepper motor movement ensures ultra-smooth needle operation for accurate readings.
• Compatible with 12V and 16V electrical systems, covering most street and race vehicles.
• Easy installation with a direct plug-in wiring harness, eliminating the need for complex wiring or modifications.
• Clear, easy-to-read 2 1/16-inch (52mm) dial with a bright, backlit display for visibility in all lighting conditions.
• Robust construction designed to withstand harsh racing environments and daily driving conditions.
• Operates safely across a voltage range of 8 to 18 volts, providing reliable monitoring regardless of electrical system variations.
• Race-proven design trusted by professional racers and automotive enthusiasts alike.

Construction & Design

The AutoMeter Sport-Comp II voltmeter features a durable, high-quality housing built to withstand the rigors of motorsport and everyday use. Its 2 1/16-inch (52mm) diameter ensures compatibility with most gauge pods and mounting locations. The gauge utilizes a digital stepper motor for precise needle positioning, delivering smooth and accurate readings every time. The backlit display enhances visibility in low-light conditions, making it easy to monitor voltage at a glance during night races or late-night drives.

The wiring harness is designed for plug-and-play installation, reducing setup time and complexity. The gauge's robust construction and high-quality components ensure long-lasting performance, even in demanding environments. Its sleek, professional appearance complements any dashboard or gauge cluster, adding a touch of precision and style to your vehicle's interior.

Performance & Sound

While the primary focus of this voltmeter is accurate electrical monitoring, its high-resolution display and smooth needle movement provide a visually satisfying experience. The gauge offers real-time feedback on your vehicle's electrical health, allowing you to respond quickly to voltage drops or surges that could indicate alternator issues, battery problems, or wiring faults. Its reliable performance helps support consistent electrical output, contributing to overall vehicle reliability and performance.

Installation & Fitment

The AutoMeter Sport-Comp II voltmeter is designed for a straightforward, bolt-on installation. It uses a standard 2 1/16-inch (52mm) mounting diameter and includes a direct plug-in wiring harness, making it compatible with most vehicles equipped with negative ground electrical systems. No cutting, drilling, or complex wiring is required—simply connect the harness, mount the gauge in your preferred location, and you're ready to monitor your electrical system in real time. This gauge is suitable for a wide range of vehicles, from daily drivers to race cars.

• Plug-and-play installation with included wiring harness
• Compatible with 12V and 16V electrical systems
• Mounts in standard 2 1/16-inch (52mm) gauge openings

What's Included

• AutoMeter Sport-Comp II Digital Voltmeter (3691)
• Direct plug-in wiring harness
• Mounting hardware and instructions

Ideal For

• Performance enthusiasts seeking reliable electrical system monitoring
• Race car builders and track day drivers
• Daily drivers who want to prevent electrical issues before they cause breakdowns
• Anyone looking for a durable, accurate voltmeter with easy installation

Emissions Note

This product is designed for use in vehicles with negative ground electrical systems and is not subject to emissions regulations. It is intended for off-road, racing, or show use only and may not be legal for street use in all jurisdictions.