Individual Gauges

Want to see boost pressure, oil pressure or air-fuel ratio in real time while you drive? Individual gauges show one value per instrument, so you can keep an eye on exactly the readings that matter most for your project – from temperature and voltage to fuel pressure and wideband AFR.

What an individual gauge shows you

Each gauge monitors one function, so you can react before a problem turns into damage. An oil pressure gauge can reveal dropping pressure, a temperature gauge can warn of overheating, and a boost gauge shows whether the turbo is delivering the expected boost. A wideband AFR gauge shows the air-fuel ratio and is typically used for tuning, while voltage and fuel pressure gauges monitor the electrical system and fuel supply.

How to choose the right gauge

• Measuring range: Choose a range that covers your expected values with some margin – for example, oil pressure gauges are available in both 0-100 and 0-150 PSI. An unnecessarily large range can make small changes harder to read.
• Mechanical or electronic: A mechanical gauge receives the pressure directly through a line, while an electronic one uses a sender and wiring. The choice depends on space, mounting and whether you want to keep fluids out of the cabin.
• Size: Many gauges are 52 mm, but there are also sizes such as 2-1/16", 2-5/8" and 5". Check that the diameter fits your pod or panel.
• Design: AutoMeter series such as Phantom, Cobalt, Ultra-Lite and Sport-Comp II look different, so you can match your other instruments.

Installation and maintenance

Electronic gauges typically require a sender; see sensors and senders if one is not included. You will find pods, lines and fittings under gauge accessories. Route lines and wires away from heat and moving parts, and check the connections regularly for leaks. Whether the installation matters for vehicle inspection depends on the product and the car, so check this for the specific part number.

Frequently asked questions

Should I choose a mechanical or electronic oil pressure gauge?

A mechanical gauge shows the pressure directly through a line, while an electronic one uses a sender and wiring and thus keeps the oil out of the cabin. The choice depends on your installation and the space you have.

What range should my boost gauge have?

That depends on the boost pressure your project runs. Choose a range with a little margin above your maximum boost, for example 30 or 35 PSI, so the needle does not max out and fluctuations are still easy to read.

What do I use a wideband AFR gauge for?

It shows the air-fuel ratio in real time via an oxygen sensor in the exhaust. It is typically used for tuning and troubleshooting, for example to see whether the engine is running too lean under load.

Why does my gauge read incorrectly or fluctuate?

Typical causes are a poor ground connection, a sender that does not match the gauge, or air in a mechanical line. Check wiring and connections, and make sure the sender and gauge belong together.