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The FAST® XR-i Ignition is a points conversion ignition system designed to replace conventional breaker points on small block Chevrolet and Ford V8 engines equipped with single point distributors. This electronic ignition module requires ballast resistance to limit coil current and utilizes a Hall Effect Sensor to detect the lobes of the distributor points cam. The system controls dwell based on battery voltage and engine RPM, aiming to provide maximum ignition energy while minimizing component heating. The mechanical and vacuum advance mechanisms operate identically to the original breaker points system.
The primary function of the XR-i Ignition is to modernize older vehicles by replacing mechanical breaker points with a more reliable and efficient electronic ignition system. By using a Hall Effect Sensor, it eliminates the wear and maintenance associated with traditional points, leading to more consistent ignition timing and improved engine performance. The system's ability to control dwell based on real-time engine conditions ensures optimal spark energy across the RPM range.
The installation process involves removing the original breaker points and installing the XR-i module and adapter plate. For GM 8-cylinder distributors, this includes applying thermal grease to the module and adapter plate, securing them, and routing wires to avoid interference with the vacuum advance mechanism. For Ford 8-cylinder distributors, the process is more involved, requiring the removal of the original points plate assembly, including the e-clip, screws, and vacuum mechanism. The XR-i adapter plates (bottom, center ring, top) are then assembled with nylon slides and secured into the distributor body. Thermal grease is applied to the XR-i module, and a jumper wire is installed on the mounting ear. Throughout the installation, it's crucial to ensure the module is positioned as close to the points cam as possible without touching the cam lobe.
The black/yellow wire of the module connects to the COIL- terminal, and the black/red wire connects to the COIL+ terminal. Proper ballast resistance is critical for correct operation. All vehicles with OE breaker points ignition are factory equipped with ballast resistance, either as an external ceramic resistor, a resistance wire, or internal coil resistance (3-4 ohms from COIL- to COIL+). If replacing an OE coil with internal resistance with a lower resistance aftermarket coil, an external 1.2 to 1.9 ohm ballast resistor (e.g., Chrysler style ICR23 or CR107) must be added between the COIL+ terminal and the ignition switch. A quick test for external ballast resistance involves checking voltage at the COIL+ terminal with the ignition on and then momentarily jumpering COIL- to ground; a drop below 8 volts indicates external ballast resistance.
After installation, all connections should be double-checked, and the battery reconnected. The engine should be cranked momentarily to visually check for clearance around all parts. Once started, the ignition timing should be set according to the manufacturer's specifications. It's important to note that dwell meter readings are meaningless with electronic ignitions and should be ignored.
The XR-i Ignition system is designed to be low maintenance, primarily by eliminating the need for periodic adjustment and replacement of breaker points. Regular inspection of wiring, distributor cap, rotor, spark plugs, and plug wires is recommended to ensure optimal performance. The use of thermal grease during installation helps with heat dissipation, contributing to the longevity of the module. The system's robust design aims to provide reliable ignition without the frequent upkeep associated with mechanical points.
General| Brand | Fast |
|---|---|
| Model | XR-i |
| Category | Automobile Accessories |
| Language | English |
