1.5in Gauge 0-15 PSI Liquid Filled ALL80200

OVERVIEW

Precision fuel management is the backbone of any high-performance air-cooled engine, and the Allstar Performance 1.5-inch Liquid Filled Fuel Pressure Gauge is the professional''s choice for maintaining that delicate balance. In the world of vintage Volkswagens, especially those running upgraded carburetion systems like Weber IDF, IDA, or Dellorto DRLA series, even a half-pound fluctuation in fuel pressure can be the difference between a crisp-running machine and one that stumbles, floods, or runs dangerously lean. This gauge provides an instantaneous, rock-steady reading from 0 to 15 PSI, allowing you to dial in your fuel regulator with absolute confidence. Unlike dry gauges that suffer from needle bounce caused by engine harmonics and fuel pump pulsations, this unit is glycerin-filled to dampen vibration, ensuring the needle stays still so you can actually read it while the engine is idling or under load.

Constructed with a rugged stainless steel case and bezel, this gauge is designed to withstand the harsh environment of an air-cooled engine bay or the punishing vibrations of an off-road sand rail. The internal components are crafted from high-quality brass, offering excellent corrosion resistance against modern fuel additives. Its compact 1.5-inch diameter makes it easy to mount directly into a fuel pressure regulator or an inline fuel block without crowding your engine tin or interfering with throttle linkages. Whether you are building a show-winning Cal-Look Beetle, a rugged Baja Bug, or a high-revving street sleeper, this Allstar Performance gauge delivers the industrial-grade reliability and accuracy that Appletree Auto customers demand for their performance builds.

FITMENT

This gauge is a universal performance component designed for low-pressure carbureted systems. It is most commonly used on the following Volkswagen and off-road applications:

• Volkswagen Beetle: All years (1946-1979) utilizing performance fuel regulators.
• Volkswagen Karmann Ghia: 1956-1974 models.
• Volkswagen Bus/Transporter: Type 2 models from 1950-1979.
• Volkswagen Type 3: Squareback, Fastback, and Notchback models.
• Volkswagen Thing (Type 181): 1973-1974 US models and global variants.
• Sand Rails & Dune Buggies: All custom tube-chassis builds using air-cooled VW drivetrains.
• Carburetor Compatibility: Optimized for Weber (ICT, IDF, IDA), Dellorto (DRLA, FRD), Solex, Kadron, and EMPI HPMX setups.

SPECS

• Brand: Allstar Performance
• Part Number: ALL80200
• Gauge Diameter: 1.5 Inches (Compact face)
• Pressure Range: 0-15 PSI (Ideal for carbureted engines)
• Dampening Type: Liquid-Filled (Glycerin) for vibration resistance
• Case Material: Stainless Steel
• Bezel Material: Stainless Steel
• Internal Components: Brass
• Connection Size: 1/8-inch NPT (National Pipe Thread)
• Connection Location: Center Back Mount
• Lens Material: High-clarity durable polycarbonate

PRO TIPS

Tip 1: The Thermal Expansion Venting Procedure

Because this gauge is liquid-filled and hermetically sealed, changes in ambient temperature or engine bay heat can cause the internal pressure of the glycerin to rise, which may slightly offset the needle from zero when the engine is off. For the most accurate reading during initial setup, locate the small rubber plug on the top of the stainless steel case. Carefully use a needle or a small pair of side cutters to "burp" the gauge or snip the very tip of the nipple to allow the internal pressure to equalize with the atmosphere. This ensures that your 3.5 PSI reading is exactly 3.5 PSI, regardless of how hot it gets under the decklid.

Tip 2: Proper Thread Sealing and Installation

When installing this gauge into your fuel regulator or fuel manifold, remember that 1/8-inch NPT threads are tapered and create a seal by "crushing" the threads together. Always use a small amount of fuel-resistant thread sealant paste or a couple of wraps of yellow Teflon tape (specifically rated for gas/fuel). Avoid over-tightening the gauge; since the body is stainless but the threads are brass, you can potentially damage the connection if you use excessive force. Tighten it until it is snug and oriented correctly, then check for leaks after the fuel system is pressurized.

Tip 3: Matching Pressure to Your Carburetor Requirements

Most air-cooled VW performance carburetors, particularly Webers, are extremely sensitive to fuel pressure. While many stock mechanical pumps can push 5-7 PSI, a Weber IDF typically thrives at exactly 3.0 to 3.5 PSI. Running higher pressure can overwhelm the needle and seat, leading to flooding, poor idle quality, and fuel dripping from the venturis (which is a major fire hazard). Use this 0-15 PSI gauge in conjunction with a high-quality regulator to fine-tune your delivery. A 0-15 PSI gauge is much more accurate for these low-range measurements than a 0-60 or 0-100 PSI gauge, as the scale allows for much finer resolution.