I heard that 1.6rr really make your engine compartment really loud...

I have an entirely new valvetrain on my car... 1.6rr, comp r lifters, valvespings, timing chain/gear, cam etc...

Anyway

When i'm revving to lets say 4k slowly to pin it (To really harness the cams power)... I can hear the engine almost as loud as the exhaust... it's very clear and almost sounds like a sewing machine... haha

It might of been there when I first got the car back, but I don't recall... I just noticed this not to long ago and i'm a little unsure if thats supposed to be there or not.

No clicking or knocking... just a loud engine... hard to explain... can anyone relate at all?