Autometer 5 Sport-Comp Monste

OVERVIEW

When it comes to monitoring the heart of your high-performance air-cooled engine, nothing carries more weight in the pits or on the dunes than the AutoMeter 5-inch Sport-Comp Monster Tachometer. This isn''t just a gauge; it''s a legacy piece of equipment that has defined the look of performance cockpits for decades. Designed specifically for the driver who demands instant readability at a glance, the massive 5-inch dial face ensures that you never miss a critical shift, even in the heat of a bracket race or while navigating a technical off-road trail in the middle of the night. The Sport-Comp series is world-renowned for its rugged reliability and surgical precision, featuring the iconic black face, bold white digits, and a signature silver bezel that perfectly complements the vintage aesthetic of a classic Volkswagen while providing modern-day accuracy that factory VDO units simply cannot match.

The ATM3980 "Monster" Tachometer is engineered to withstand the extreme vibrations and harsh environments inherent to air-cooled applications, from the high-revving nature of a dual-carbureted 2332cc stroker engine to the jarring terrain encountered by a long-travel sand rail. Its advanced air-core movement provides lightning-fast response times and steady needle movement, effectively eliminating the needle "bounce" often seen in inferior gauges when the engine is under heavy load. The adjustable redline shift marker is a standout feature, allowing you to manually set your peak power point visually, providing a clear reference to protect your valvetrain from catastrophic over-revving. Whether you are building a period-correct Cal-Look Beetle, a wide-eye Baja Bug, or a dedicated competition drag car, this tachometer provides the professional-grade data acquisition you need to keep your VW running at its absolute peak performance level.

FITMENT

This universal high-performance tachometer is designed to work with a wide range of ignition systems and is a staple in the following air-cooled Volkswagen and off-road applications:

• Volkswagen Type 1: Beetle and Super Beetle (All Years)
• Volkswagen Type 2: Bus, Transporter, and Kombi (1950-1979)
• Volkswagen Type 3: Fastback, Squareback, and Notchback
• Volkswagen Type 181: The Thing
• Volkswagen Karmann Ghia: Coupe and Convertible
• Custom Off-Road: Dune Buggies, Sand Rails, and Manx-style fiberglass bodies
• Racing Applications: NHRA/IDRC Drag Beetles and SCORE-class Baja racing machines

SPECS

• Product Series: Sport-Comp "Monster" Series
• Gauge Diameter: 5 Inches (127mm)
• RPM Range: 0 to 10,000 RPM
• Movement Type: High-Precision Air-Core
• Bezel Finish: Brushed Aluminum / Silver
• Face Color: Professional Black
• Pointer Color: High-Visibility Fluorescent Red
• Lighting: Perimeter Incandescent (Includes Red and Green bulb covers)
• Engine Compatibility: Works with 4, 6, and 8-cylinder engines
• Ignition Compatibility: Compatible with standard points, electronic ignitions, and most high-output racing ignitions (like MSD)
• Shift Marker: Externally adjustable redline pointer
• Mounting: Includes pedestal mount for dash-top or steering column installation

PRO TIPS

Tip 1: Proper Grounding is Paramount

In the world of air-cooled Volkswagens, especially those with fiberglass dune buggy bodies or aging factory wiring harnesses, a "clean" ground is the difference between a steady needle and a jumpy one. Always run your tachometer''s ground wire directly to a solid chassis point or the negative terminal of the battery. Avoid daisy-chaining the ground to other low-voltage dashboard accessories, as electrical "noise" can interfere with the RPM signal, leading to inaccurate readings or erratic needle behavior at high RPMs.

Tip 2: Ignition System Signal Compatibility

If you are running a modern high-output ignition system like an MSD 6AL or a Pertronix Ignitor, you may need to pay special attention to where you source your tachometer signal. For standard points or basic electronic ignitions, the signal usually comes from the negative side of the coil. However, with many capacitive discharge (CD) ignitions, you must use the "Tach Output" port on the ignition box itself. Connecting the ATM3980 directly to the coil on a CD ignition system can damage the gauge or cause it to read incorrectly due to the multiple-spark discharge.

Tip 3: Optimizing the Mounting Location

The "Monster" 5-inch tachometer is designed for maximum visibility, but its size requires strategic placement. For a classic Beetle, we recommend mounting it on the steering column using a heavy-duty hose clamp or on top of the dashboard slightly angled toward the driver''s line of sight. When mounting on a sand rail frame or a Baja Bug cage, ensure you use the included pedestal mount with the provided rubber vibration isolators. This prevents the high-frequency vibration of the engine from transferring directly into the gauge housing, which extends the life of the internal air-core mechanism and keeps the needle steady during wide-open-throttle runs.