Official Dealers for:
GEMS
Gemshas been designing and building competition engine management systems since 1985. Because of an ongoing policy of developing products in response to the needs of its customers, and in many cases in close collaboration with its customers, the range of products available are now highly flexible and covers all engine management requirements.
Gems manufacture a number of ECUs including PNP applications for Evo and Impreza. The table below shows the features of each ECU
| ECU Name | EM36 | EM40 | X25 | Mitsubishi EVO Plug & Play | Subaru Impreza Plug & Play | Impreza R Series Plug & Play | Notes |
|---|---|---|---|---|---|---|---|
| Cylinders | |||||||
| Max Sequential | 12 | 12 | 12 | 4 | 4 | 4 | |
| Max Semi-Sequential | 12 | 12 | 24 | n/a | n/a | n/a | |
| Max Coil Per Plug | 6 | 6 | 8 | 4 | 4 | 4 | |
| Max Wasted Spark | 12 | 12 | 16 | n/a | n/a | n/a | |
| Rotary | 3 | 3 | 4 | n/a | n/a | n/a | |
| EM36 | EM40 | X25 | Evo Plug and Play | Impreza Plug and Play | Impreza R Series Plug and Play | ||
| Features | |||||||
| Uneven Firing Angles | Yes | Yes | Yes | Yes | Yes | Yes | |
| Boost Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Idle Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| 2 Stage Idle Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Cam Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Variable Valve Timing | Yes (2 Channel) | Yes (2 Channel) | Yes (4 Channel) | Yes (2 Channel) | Yes (2 Channel) | Yes (2 Channel) | |
| Closed Loop Fuelling | Yes | Yes | Yes | Yes | Yes | Yes | |
| Auto Mapping | Yes | Yes | Yes | Yes | Yes | Yes | |
| Max RPM | 12000 | 15000 | 25000 | 9000 | 9000 | 9000 | Can vary depending on timing pattern |
| Twin Spark Engines | Yes | Yes | Yes | No | No | No | |
| Twin Injector Engines | Yes | Yes | Yes | No | No | No | |
| Traction Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Launch Control | No | No | Yes | Yes | Yes | No | |
| Anti-Lag | Yes* | Yes* | Yes | Yes | Yes | Yes* | *Track/Road ALS - Reduced agressiveness compared other ECUs |
| Anti-Lag Modes | 1 | 1 | 2 | 2 | 2 | 1 | |
| Alternate Fuel mode | Yes | Yes | Yes | Yes | Yes | Yes | |
| Full throttle gear change | Yes | Yes | Yes | Yes | Yes | Yes | |
| Voltage Compensation | Yes | Yes | Yes | Yes | Yes | Yes | |
| Drive By Wire Throttle Control | Optional Extra | Yes | Yes | Yes | No | No | |
| Active Throttle Control | Yes | Yes | Yes | Yes | No | No | |
| Knock Control | Yes | Yes | Yes 2 | Yes | Yes | Yes | |
| Gear Calculation | Yes | Yes | Yes | Yes | Yes | Yes | |
| Gear based fuel Modifiers | Yes | Yes | Yes | Yes | Yes | Yes | |
| Gear based spark Modifiers | Yes | Yes | Yes | Yes | Yes | Yes | |
| Gear based boost Modifiers | Yes | Yes | Yes | Yes | Yes | Yes | |
| Gear based Rev Limits | Yes | Yes | Yes | Yes | Yes | Yes | |
| Sensor failure detection | Yes | Yes | Yes | Yes | Yes | Yes | |
| Fuel Trims Per Cylinder | Yes | Yes | Yes | Yes | Yes | Yes | |
| Ignition Trims Per Cylinder | Yes | Yes | Yes | Yes | Yes | Yes | |
| Switchable Boost | Yes | Yes | Yes | Yes | Yes | Yes | |
| EGT Fuel Correction | No | No | Yes | No | No | No | |
| EGT Boost Correction | No | No | Yes | Yes | Yes | Yes | |
| Temperature Dependant Cuts/Retards | Yes | Yes | Yes | Yes | Yes | Yes | |
| Fuel Pump Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Intercooler Spray Control | Yes | Yes | Yes | Yes | |||
| Independent upstream injector control | Yes | Yes | Yes | No | No | No | |
| Lambda Feedback Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Lambda Heater Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Nitrous Control | No | No | Yes | No | No | No | |
| Water Injection Control | No | No | Yes | No | No | No | |
| Radiator Fan Control | Yes | Yes | Yes | Yes | Yes | Yes | |
| Vehicle Speed Calculation | Yes | Yes | Yes | Yes | Yes | Yes | |
| User Configurable Tables | 4 | 4 | 1 | 1 | 1 | 1 | |
| Fuel tank guage | Yes | Yes | No | No | No | No | |
| Upgradeable firmware | Yes | Yes | Yes | Yes | Yes | Yes | |
| EM36 | EM40 | X25 | Evo Plug and Play | Impreza Plug and Play | Impreza R Series Plug and Play | ||
| Inputs | |||||||
| Throttle | Yes | Yes | Yes | Yes | Yes | Yes | |
| Water Temp | Yes | Yes | Yes | Yes | Yes | Yes | |
| Air Temp | Yes | Yes | Yes | Yes | Yes | Yes | |
| MAP | Yes | Yes | Yes | Yes | Yes | Yes | |
| MAF | Yes | Yes | Yes | Yes | Yes | ||
| Baro | Internal | Internal | No | Internal | Internal | Internal | |
| EGT | No | No | Yes (4) | Yes | Yes | Yes | |
| Lambda | 2 | 2 | Yes | Yes 2 | Yes 2 | Yes | |
| Wideband Lambda | No | No | Yes 2 | Yes | No | No | |
| Oil Pressure | No | No | Yes | Yes (Switch) | No | No | |
| Fuel Pressure | No | No | Yes | No | No | No | |
| Oil Temp | No | No | Yes | No | No | No | |
| Battery Voltage | Yes 2 | Yes 2 | Yes | Yes | Yes | Yes | |
| Wheel Speeds | Yes 1 | Yes 1 | Yes | Yes | Yes | Yes | |
| Crank | Yes | Yes | Yes | Yes | Yes | Yes | |
| Cam | Yes 2 | Yes 2 | Yes 4 | Yes 4 | Yes (2/3*) | Yes (2/3*) | *2002 models |
| Launch Switch | n/a | n/a | Yes | Yes | Yes | No | |
| Anti-Lag Switch | Yes | Yes | Yes | Yes | Yes | Yes | |
| Alternate Fuel Switch | Yes | Yes | Yes | Yes | Yes | Yes | Can be used for Nitrous control |
| Analogue Inputs which can be used as Digital Inputs | 16 | 16 | 16 | ||||
| Max Spare Inputs | 9 | 11 | 22 | 3 | 2 | 3 | Depends on usage of other inputs and outputs |
| EM36 | EM40 | X25 | Evo Plug and Play | Impreza Plug and Play | Impreza R Series Plug and Play | ||
| Outputs | |||||||
| Ignition | 6 x 8amp | 6 x 8 amp | 8 x 15 amp | 4 | 4 | 4 | EM40 outputs either coil or ignition or general |
| Injection | 12 x 3amp | 10 x 3amp | 12 or 8 x pk hold | 4 | 4 | 4 | |
| Bridge | Optional Extra | 1 | 6 | 1 | 3 | 1 | |
| Total | 20 | 20 | 25 | 12 | 18 | 10 | |
| Total High side | 2 | 2 | 4 | 0 | 1 | 1 | |
| Fuel Pump | Yes | Yes | Yes | Yes | Yes | Yes | |
| Air Con | Yes | Yes | Yes | Yes | Yes | Yes | |
| Tacho | Yes | Yes | Yes | Yes | Yes | Yes | |
| Shift Light | Yes | Yes | Yes | Yes | Yes | Yes | |
| EM36 | EM40 | X25 | Evo Plug and Play | Impreza Plug and Play | Impreza R Series Plug and Play | ||
| Data-logging | |||||||
| Memory | 512KB | 512KB | 1MB | 512KB (8MB in Evo X) | 512KB | 512KB | |
| Max Logging Speed | 250Hz | 250Hz | 250Hz | 250Hz | 250Hz | 250Hz | |
| Telemetry | |||||||
| CAN | Yes | Yes | Yes (2) | Yes (2 on Evo X) | Yes | Yes | |
| Serial | Yes | Yes | Yes | Yes | Yes | Yes | |
| PC Communication | |||||||
| Serial RS232C | Yes | Yes | Yes | Yes | Yes | Yes | |
| USB 1.1 | No | No | Yes | Evo X Only | No | No | |
| Comms Connector | 9 Pin D-Type | Not separated | Autosport | 3 Pin Binder * | 3 Pin Binder | 3 Pin Binder | *Evo X also has Autosport Comms Connector which is used for the USB Comms |
| Metrics | |||||||
| Size mm | 200 x 105 x 45 | 130 x 90 x 30 | 160 x 145 x 35 | OE | OE | OE | |
| Weight grams | 645 | 300 | 580 | ||||
| Connector | |||||||
| Type | AMP 36 | Autosport | Autosport | OE | OE | OE | |
| Number | 1 | 3 | 3 | OE | OE | OE |
Please call us for pricing on GEMS.