Today we are talking about the Toyota Supra JZA80 and the Wolf V500 Plugin Engine Management System.
The Plugin Kit gives you the ability to control ignition timing, fuel delivery, boost control, and whole host of other control systems on the JZA80.
The standard JZA80 had twin turbos, with three different boost control valves on it, the V500 can control that standard system. If you want to change to a huge single turbo, the V500 can control that as well.
In standard configuration, the V500 can use up to 30PSI boost pressure with the on-board MAP Sensor, or you can request an upgrade to a 45PSI boost pressure MAP Sensor. You can, of course, use an external MAP Sensor for even higher boost levels.
To remove the original Toyota ECU from the JZA80 Supra, you’ll find it underneath the passenger side footwell carpet. Pull the carpet back, and remove the plastic panel that covers the ECU by removing the 3 10mm nuts. The original ECU is mounted on the floor. You undo the 10mm nuts to take the ECU out, and undo the 10mm bolt in the middle of the main connector and remove the plugs from the ECU.
Once the original ECU has been removed, it’s time to plug in the adapter harness. First plug together the main connector with the bolt. Press the connectors firmly together and do up the bolt making sure it is properly seated. Once the bolt is bottomed out, it’s time to connect the small connector. Just listen for the ‘click’ to ensure it is properly seated.
Now we fit the V500 Plugin Harnesses Earth Strap (large eyelet) to one of the mounting bolts in the floor of the JZA80. Finally, we plug the Wolf V500 ECU into the Wolf plugs on the Plugin Harness.
The V500 senses engine vacuum and boost pressure using a vacuum line that is run from the manifold to the V500. Make sure the vacuum line you are using has full manifold vacuum. Don’t, for example, use a vacuum source that is connected to any device that may bleed off vacuum or boost.
One tip would be to run the communications cable out to a point (inside the glovebox for example) so that it is easy to get to for tuning.
Turn on the ignition key, the green light on the ECU will come on. On cranking, the light will turn yellow. When the engine runs, the light will turn blue, indication that all triggering systems (camshaft and crankshaft) are operating normally.
The ECU and harness can then be mounted and the plastic cover and carpet replaced.
The engine should start and run using the base tune that is supplied in the ECU. Now it is time to check the ignition timing with a timing light, and check around the engine bay to make sure there are no leaks or loose hoses or fittings before the car is taken to the dyno.