I wish the FSM went into more detail. This is straight out of the FSM for my truck (VQ40) since its all I have handy. I agree it helps out everywhere in the curve, I was just saying that it seems to help more on the low end, <4000 rpm. My curve is lacking on the low end, top end seems to match VQ35's with vtc's and cams like me.
Quote:
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high-speed range.
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