In the last installment we disassembled our SR20 in preparation for machining. Now comes the fun part where we get to pick all the parts for the new build! We’re going to start with Engine Management.
We selected the Thunder due to its overwhelming amount of inputs and outputs which provides us a universal, future proof Engine Management solution. This ECU can basically run any motor you throw at it. Some of the Thunders main features are an onboard 3 axis accelerometer, two EGT thermocouple inputs, two onboard Lambda controllers, and two e-throttle controllers. Here is a complete breakdown of the I/O capabilities of this ECU.
- 16 x Digital inputs
- 4 x Temperature inputs
- 16 x Analog inputs
- 2 x Trigger inputs
- 2 x Knock inputs
- 2 x LSU 4.9 Wideband lambda sensor inputs
- 2 x K Type Thermocouple inputs
- 8 x Peak and Hold injection drives
- 8 x Ignition drivers
- 18 x Auxiliary outputs*
- +5V Sensor power supply
- +8V Sensor power supply
- 2 x CAN bus
- 1x Serial (RS232) connection
- 1x USB tuning connection
The way Link pins its ECU’s is actually really clever. It’s pinned in such a way that each of the 32 pin A and B connectors drive 4 cylinders, or one bank of a V8. The 26 pin C and D connectors are used for additional I/O. Most of Link’s wire-in ECU’s also share the same pinout for the A and B connectors. So let’s say you have a Link G4+ Xtreme ECU running your engine, and you decide to upgrade to the G4+ Thunder for the extra I/O. You can literally unplug your Xtreme and just plug the Thunder into the same harness and it will work.