Autometer 2 5/8 Ultra-Nite Fu

OVERVIEW

When you''re pushing the limits of an air-cooled engine, whether it''s a high-compression street Beetle or a dual-carbureted sand rail screaming across the dunes, fuel pressure consistency is the lifeblood of your performance. The AutoMeter 2 5/8-inch Ultra-Nite Mechanical Fuel Pressure Gauge (ATM4511) is engineered for the serious enthusiast who demands dead-on accuracy and rugged durability. This isn''t your average dashboard trinket; it is a professional-grade mechanical instrument designed to monitor the low-pressure fuel systems common in high-performance carbureted Volkswagen applications. The Ultra-Nite series features a unique luminescent dial that absorbs ambient light to glow in the dark, providing visibility without the need for complex electrical wiring or bulbs that can vibrate loose in harsh off-road environments. With a 0-15 PSI range, this gauge offers the high-resolution readout necessary to dial in your Weber, Dellorto, or Solex carburetors to perfection, ensuring you never run lean at wide-open throttle.

Safety and reliability are paramount at Appletree Auto, which is why we emphasize that this is a mechanical gauge intended for external mounting. Because a mechanical gauge brings a live fuel signal directly to the back of the instrument, it should never be mounted inside the passenger compartment. For the VW community, this makes it the ultimate choice for cowl-mounted setups on drag bugs or fender-mounted configurations on trophy-style sand rails. The oversized 2 5/8-inch face allows for quick, "at-a-glance" monitoring while you''re focused on the track or the trail. Constructed with AutoMeter''s legendary race-proven movements, the ATM4511 is built to withstand the intense vibrations and jarring impacts of off-highway use. If you are serious about protecting your engine investment and maximizing your horsepower through precise fuel delivery monitoring, this Ultra-Nite gauge is the industry standard you can trust.

FITMENT

This gauge is a universal mechanical instrument designed for off-highway vehicles and custom air-cooled Volkswagen applications. It is ideally suited for the following:

• VW Beetle & Super Beetle: All years (External/Cowl Mount).
• VW Karmann Ghia: All years (External/Cowl Mount).
• VW Bus / Transporter (Type 2): All years (External/Engine Bay Mount).
• VW Type 3 (Squareback, Fastback, Notchback): All years.
• VW Thing (Type 181): All years.
• Dune Buggies & Sand Rails: All custom tube chassis applications.
• Meyers Manx & Clones: All fiberglass body styles.
• Custom Trikes: Using air-cooled VW powerplants.

SPECS

• Part Number: ATM4511
• Gauge Series: Ultra-Nite (Luminescent Glow)
• Gauge Type: Mechanical Fuel Pressure
• Pressure Range: 0-15 PSI
• Gauge Size: 2-5/8 Inch (66.7mm)
• Dial Color: White (Luminescent)
• Bezel Color: Silver / Brushed Aluminum
• Pointer Color: Fluorescent Orange
• Sweep: Full Sweep
• Fitting Size: 1/8 Inch NPT Male Connection
• Lighting: None (Self-illuminating dial)
• Application: Off-Highway Use Only

PRO TIPS

1. Prioritize Safety with External Mounting

Because this is a mechanical gauge, it functions by routing a pressurized fuel line directly to the fitting on the back of the unit. You must NEVER mount this gauge inside the cabin of your VW. In the event of a line failure or a fitting leak, fuel would be sprayed directly onto the driver or inside the passenger compartment, creating a massive fire hazard. We recommend using a dedicated gauge cup or a cowl-mount bracket to secure the instrument outside the windshield or on the engine cage of your sand rail. This keeps the fuel where it belongsoutside the driver''s spacewhile still providing the critical data you need.

2. Use High-Quality Braided Lines

To ensure the most accurate signal and the highest level of safety, we strongly recommend plumbing this gauge with a #4 AN (1/4-inch) braided stainless steel hose. Avoid using cheap plastic or nylon "capillary" tubing, as these are prone to kinking, melting near heat sources, or becoming brittle over time due to UV exposure and vibration. A braided line with the correct adapter fittings provides a robust, leak-proof connection that can handle the constant bouncing of a dune buggy or the high-vibration environment of a performance VW engine bay without failure.

3. Mastering the Luminescent Glow

The Ultra-Nite series is unique because it doesn''t require a 12V light hookup, making it perfect for simplified wiring harnesses in race cars and off-roaders. To get the best performance from the glow-in-the-dark dial, ensure the gauge face is exposed to ambient light (either sunlight or bright shop lights) prior to use. If you are prepping for a night run in the dunes, a quick "charge" with a bright flashlight held against the lens for a few seconds will make the dial pop with high-visibility luminescence that lasts through your heat. This eliminates the risk of electrical shorts in your lighting circuit during a race.