4AGE 16v pinging at 3000+ rpm

[sexycar]

I got some pinging sound when I throttle at 3000-4000rpm
on 5th gear on my ae86 4age 16v engine.. When I off throttle
there is no sound, tap on throttle the pinging sound come out..
I wonder how to rectify... any suggestions? My adjustable
fuel regulator is set at 41 psi.. i suspect the tuning is not right,
Can anyone tell me whats the advancement degree range for
the bluetop 4AGE 16v.. or better yet, any superbly skilled 4AGE
tuner in KL?

 

[KE2020]

Wah, why set your fuel pressure so high? Stock pressure is 37 psi only.
And how many degree is your ignition?