Adaptronic eSel021 Select ECU – Mazda RX7 series 6/7
Product code: eSel021
AUD 1,499.00 Add to cart
This product is a plug-in ECU designed specifically for the RX7 series 6 twin turbo. It’s a direct plug-in to the factory wiring and allows you to expand the system to use all the features of the 440 ECU. Due to the large number of outputs required, this ECU does not drive the anti-pollution functions such as a the air pump, port air injection valve and so on, but it does control the oil metering pump, twin turbochargers and boost.
Twin turbo operation
The factory twin turbocharger system on the RX7 uses four control valves:
1) The turbo control valve; this is the main exhaust flap to flow exhaust through the second turbo
2) The intake control valve; this output must be driven opposite to the turbo control valve; when activated, it closes off the compressor exit of the second turbo
3) The precontrol valve; this allows a small amount of exhaust to flow through the second turbine
4) The charge relief valve; this allows the excess air from the second turbo to flow back into the intake We drive this using two outputs; one drives the twin turbo control (and intake control) activated on RPM and MAP. The other is configured as a precontrol output; this is controlled by the ECU to come on a fixed time before the twin turbo RPM condition is met. Often there will be a dip in the torque when transitioning to the second turbo, even on a production, unmodified car.
The following is a dyno plot of an unmodified twin turbo FD: Blue = factory ECU, and the red = the Adaptronic.
Attribute |
|
Physical |
|
| Connectors | 76-pin 4-plug connector (same as factory ECU) |
| Mini USB port for connection to laptop | |
| 2x 2.5mm jacks for serial communications (one to connect to external loggers and dashes, the other to connector to slave devices such as wideband oxygen sensor controllers) | |
| 3.5mm headphone jack for listening to knock | |
| Physical Dimensions (mm) | 205 x 147 x 33 mm (including mounting tabs) |
| Mass | 0.8 kg |
| Looms available | None (use factory loom) |
Sensor Interfaces |
|
| Crank angle sensor type | 3 programmable inputs, reluctor or hall-effect/optical, configurable as triggering ignition timing, injector drive, ignition timing during cranking, or cylinder 1 marker. |
| Capable of triggering off rising and/or falling edge on the same trigger input pin, internal pull-ups for hall-effect/optical trigger inputs | |
| Crank angle trigger waveforms | Sync / trigger / multitooth / missing tooth (versatile programmability) |
| Nissan optical | |
| Mitsubishi style with 2 sync pulses | |
| Virtually all factory triggering systems | |
| Vehicle speed inputs | 4 inputs – digital or reluctor |
| External Manifold Absolute Pressure (MAP) input | 0 – 5V, 2-point linear calibration, range 0 to 400 kPa (5V supplied by ECU) |
| There is also an internal 4 bar MAP sensor inside the ECU | |
| Air, water and aux temp inputs | 4k7 pull-up (requires separate thermistor connected to ground), 32-point linearly interpolated calibration, range -30 to 125°C |
| EGO input | 0 – 1V factory narrowband, or Bosch “wideband” – input impedance 10 MOhm. |
| Can connect 0-5V linearised sensor (eg PLX, M&W UEGO) to aux input | |
| Can connect 0-3V Zietronix sensor to analogue input | |
| Can connect M&W UEGO, TechEdge, Innovate LC-1 and TC-4 on secondary serial port | |
| Knock input | High impedance input, filtered |
| Throttle position (TPS) input | 0-5V (5V supplied by ECU), 2-point calibration |
| Auxiliary digital inputs | 8 inputs, each configurable as active-high or active-low, 12V tolerant inputs |
Actuator Interfaces |
|
| Number of injector drivers | 4 |
| Injector driver waveforms | Full sequential |
| Batch | |
| Semi-sequential every period or semi-sequential every second period | |
| Half/third/quarter speed full sequential | |
| Fire all at once every cylinder 1 (as on Swift GTi, Alpine Renault) | |
| Optional batch fire during cranking | |
| Injector driver current | Optional constant current or peak-hold drive, selectable steady-state current of 0.5A, 0.9A, 1.5A or 1.9A |
| Number ignition outputs | 4 (using 4th channel disables aux output 1) |
| Ignition output waveforms | Selectable as firing on rising edge or falling edge |
| Ignition output type | Open-collector with 560Ohm pull-up (allows direct connection to OEM transistor or separate igniter box) |
| Number of auxiliary outputs | 8 (or 7 if using 4 ignition channels) |
| High current outputs | Max current 7A (or 3A inductive), 3 of these PWM capable, PWM frequency selectable (23Hz – 2kHz) |
| Low current outputs | Max current 200mA – suitable to drive relay coils |
Control Characteristics |
|
| Map points | 512 cells per fuel/ignition map, dual maps which can be toggled with digital input. |
| Load determination and Tuning Modes | Optional Volumetric Efficiency Tuning |
| TPS or MAP based | |
| TPS using 2nd map as MAP backup | |
| MAP using 2nd map as TPS backup | |
| Both maps MAP or TPS, digital input to select | |
| MAP and TPS map, digital input to select | |
| MAP and TPS map, use MAP on closed throttle, otherwise TPS | |
| Use max/min/average/sum (MAP, TPS) | |
| Read TPS from map and multiply by value in MAP table | |
| Injector pulse width resolution | 0.7µs (0 – 44ms) |
| Ignition resolution | 0.2° (0 – 51°) |
| Dwell time resolution | 0.1ms (0.1ms – 5ms) |
| Dwell time reduction for high RPM with high dwell time | |
| Accelerator pump | TPS and/or MAP based (configurable proportionality) as well as asynchronous accelerator pump. |
| Works with TPS pot or switch – pot gives better performance | |
| Fuel control strategies | Open loop, closed loop, and two adaptive modes (requires EGO sensor) – can run open loop above a specific MAP if required, target AFR can be set across rev and load ranges. |
| Flex Fuel capability (requires fuel composition sensor to be fitted). | |
| Fuel correction | Trim tables based on Coolant Temperature and Air Temperature, Dead-Time correction |
| Ignition control strategies | Trim tables based on Coolant Temperature and Air Temperature |
| Idle control strategies | Open loop values with a 32-entry temperature table |
| Target idle speeds with 32-entry temperature table | |
| Idle effort correction for air temperature | |
| Idle-up functionality based on A/C request, electrical loads, power steering | |
| Can adjust ignition timing for closed loop idle control, as well as various types of idle control valves (2 wire, 3 wire, 6 wire stepper, and 4 wire stepper using an external driver available separately) | |
| Main loop speed | 400 Hz (approx) |
AUD 1,499.00 Add to cart
