This one differs from the 4303 model we named Best Basic Boost Gauge in that it reads only boost and not vacuum; also, the 2617’s dial goes up to 60 PSI, doubling what the 4303 can handle.

Way back in 2007, someone on a VW TDI forum came up with a new boost gauge project. At the time, it was a remarkable feat of engineering, capable of displaying the manifold pressure on a tiny OLED ...

Turbosmart’s e-Boost2 kit comes complete with a gauge-size boost controller and all the hardware and instructions needed for a quick and easy installation.

The gauges run on the ESP32 platform, chosen for its WiFi hardware and its ease of use with the Arduino platform. This makes programming a snap, and interfacing to a smartphone easy.

For a deeper dive into the mess that is boost threshold and turbo lag -- including some all-important whiteboard diagrams -- check out the video above.