Restoration Performance SGI-100BT Universal Speedometer & Tach Interface — Bluetooth Programmable, Diesel/Gas Swap Compatible

The Dakota Digital SGI-100BT by Restoration Performance is a compact universal interface that recalibrates speedometer and tachometer signals for gas and diesel swaps, and programs multiple outputs via Bluetooth or onboard controls.

If you're installing aftermarket gauges, performing an engine swap, or converting between gas and diesel systems, the SGI-100BT simplifies signal conversion and calibration in a single 4" x 2" x 1" module. It combines speed signal conditioning, tach generation and calibration, and diesel-specific tach outputs so one unit replaces several separate devices. The interface supports broad calibration ranges, multiple voltage inputs, and both app-driven and manual setup for fast integration into custom or restored vehicles.

How does the SGI-100BT handle different speedometer signals?

The unit accepts a wide range of electronic speed inputs and can scale the output anywhere from 25% to 400% to match aftermarket gauges or different final drives. It also provides multiple speed outputs so several devices can receive the corrected signal simultaneously.

• Calibration span: 25%–400% to match varied gear ratios and tire sizes.
• Multiple outputs for running several gauges or modules at once.
• Built-in electronic pull-up supports high- or low-voltage inputs without extra hardware.
• Not compatible with ABS sensor systems — intended for non-ABS electronic speed sources.

Can the SGI-100BT generate or adjust tachometer signals for different engines?

The SGI-100BT can calibrate a conventional tach input and produce appropriate tach outputs for gas engines and diesel swap applications. It supports cylinder counts from 1 to 16 and both 5V and 12V signal types for broad compatibility.

• Tachometer settings configurable for 1–16 cylinders to match engine firing patterns.
• Selectable 5V or 12V signal types to suit common gauge inputs.
• Diesel outputs configured for 4, 6, or 8-cylinder tachometers, helpful in swap scenarios.
• Can derive tach input from various sources: alternator "W" terminal, timing gear sensor, or flywheel sensor (flywheel sensor sold separately).

What are the setup and programming options?

Program the SGI-100BT with either the built-in LED display and pushbuttons or wirelessly through the mobile app via Bluetooth. Both methods let you calibrate speed scaling, choose tach configurations, and verify outputs before final installation.

• Bluetooth connectivity for app-based setup and real-time adjustments from your phone or tablet.
• On-device LED display and buttons for field programming without a mobile device.
• Quick verification of outputs during bench testing or while installed in the vehicle.
• Compact case fits behind dash panels or inside wiring harness packs for neat installations.

What wiring and vehicle uses are supported?

The SGI-100BT is designed for universal use with many electrical systems but excludes ABS wheel-speed sensors. It accepts various signal sources and voltages, making it a flexible choice for custom builds, restorations, and engine conversions.

• Accepts high- or low-voltage speed inputs thanks to the integrated pull-up circuit.
• Compatible with alternator stator "W" tap, timing gear sensors, and external flywheel sensors.
• Not recommended for direct ABS sensor connections or vehicles that rely on ABS-based speed data.
• Small enclosure (4" x 2" x 1") for discreet mounting behind the dash or under consoles.

Who is this for: The Dakota Digital SGI-100BT suits technicians, hot-rodders, and restoration enthusiasts who need a single, adjustable interface to make aftermarket gauges read correctly after swaps or custom driveline changes. It's ideal for anyone adding aftermarket speedometers or tachs to gas or diesel builds, performing engine conversions where original signal sources change, or consolidating multiple signal-conditioning boxes into one programmable module.