Hello Karlos

Thank you for your timing map.
What compression ratio does your engine have? I seem to remember it was less than 8:1?
It looks like your map shows 20 to 23 degrees advance between 4000 and 7000 rpm at 15 psi boost.
Have you monitored exhaust gas temperatures? Do you have a knock sensor?
Did you have to take any timing out at the engine torque peak rpm?
I have heard that is where an engine is very sensitive to ignition timing.

Cheers

Perry