Sound of a forged 2ZZ engine

[Dev]

My (limited) experience is that higher lift is noisier than lower lift, for a given valve clearance.
It seems sort of intuitive - the lobe has to hit the valve harder to lift it further in a similar period of time.

 The engine sound is louder particularly the intake sound from the cabin but the valve train sounds are generally not that much louder from what I have experienced by having someone go into lift at idle and observing in the engine bay. However there is a lot more wear associated with the high cam lobes and corresponding pads that wear out as they do take a beating which where the 2ZZ is prone to wear if you do not use an oil with an aggressive anti wear package or the clearances are too tight.