What the REM is for
The Race Expansion Module (REM) is an add-on box for the Elite 1500 and Elite 2500. It exists for builds that outgrow the ECU's own outputs: big V8s running two injectors per cylinder, race cars logging lots of sensors, and setups that need more advanced traction control and torque management.
The headline feature is injection. Paired with an Elite 2500, the REM lets you run up to 16 injectors in sequential staged mode and drive as many as 32. That's what makes a dual-injector-per-cylinder V8 practical on methanol or E85.
What it adds
| Channel | Qty | Details |
|---|---|---|
| Injector outputs | 8 | Peak and hold, 0 to 8 A peak, 0 to 2 A hold |
| Digital pulsed outputs, low side | 4 | 1 A max |
| Digital pulsed outputs, high or low side | 4 | 1 A max |
| Digital pulsed inputs | 4 | Digital only. One is used if you need a 4th injection stage |
| Analog voltage inputs | 8 | Selectable pull-up |
| Buffered analog inputs | 2 | Suited to O2 sensors, no selectable pull-up |
| Haltech CAN | 1 | Front connector only |
A few channels are reserved for the module itself and can't be reassigned: two sync inputs that receive the staged injection signal, a watchdog output, an injection relay control output, and an 8V supply for the injection relay conditioning circuit. The extra I/O is only available when you are not also running an I/O Expander 12.
Specs
- Supply voltage: 8 to 16 V DC
- Max operating temperature: 85 °C (185 °F)
- 5V sensor supply: 100 mA max
- Size: 7.28 x 4.92 x 1.71 in (185 x 125 x 43.5 mm)
- Weight: 0.771 lb (550 g)
- IP67 waterproof, but only with the pocket cover or the waterproof USB cable and cap fitted
Neither the HT-070002 waterproof USB cable nor the matching HT-070004 cap comes in the box. Without them (or the pocket cover), the case is not sealed.
Wiring it in
The Elite 2500 + REM 16-injector wire-in harness is the easy route. If you're building your own, the 26-pin and 34-pin connector pages and the REM quick start guide cover the details. Not sure you need one? Book a free consultation and we'll look at your injector and I/O count together.
