Help with knock

[PetefromtheStreets]

Are you sure it's actual detonation that's occurring or wether it's just engine noise. My knock sensor goes off randomly and I'm positive it's not detonation. Either that or here's another....what's your fuel pressure? Any upgrades to the fuel system?

Where does your vtec engage? Around 4000rpm? Could be the pop of vtec causing your noise.

[Fireblade893]

Ok, i have pistons slap at cold engine...can this is the problem that create noise?

Cold engine

http://www.youtube.com/watch?v=WLFOh8OPmlQ

hot engine

http://www.youtube.com/watch?v=mdzoOQGThPI

I attach the datalog..

For the fuel system is the returnless stock Honda with aeromotive fuel pump and ID1000 injector