My AFR is 0.82-0.84 , do you think i need less?
With 100 octane fuel, definitely not.
The timing is very low now i think , but i can not understood why i have retards.
Me neither, especially with those low intake temps. Maybe retorque your knock sensor?
Have you ever heard audible detonation?
I would really try to pull more boost and add timing back if possible. You may pick up some HP, believe it or not.