What is max boost on this super charger ls9 engine 376 cui ?

runing 15 psi today want more boost !

we have 99 octane pump gas ,,, in Denmark

Max Total timing ?

is there anyone with experience in LS9 Engine ?

Change on the engine

Heads are ported and the cam are changed and " snout " of the supercharger ...

Did not ported intake / supercharger ! vil it pay of to do this ?

Fast XFI /Fast throttelbody 18 Degree total timing ....