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The 2GR-FSE is the same way. You have a bump in torque and then as the cam phasing decreases with higher rpm you get a torque dip. The ignition timing changes are less pronounced than in the FA20. All this happens after the port injectors turn off. Start of injection for the GDI system is around 310 BTDC for that engine as the torque drops down.
It looks like nobody has figured out the injection timing yet on the FA20.
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