mi zonda engine died after engine stage 3 and turbo stage 3, but i found the solution, take off the turbo, if you are in a track you will still not hear the engine, but exit the race/practice, enter again and you will hear it
so,
zonda r + engine stage 3 = sound
zonda r + engine stage 3 + turbo = no sound
zonda r + turbo = no sound
maybe it varies..
so,
zonda r + engine stage 3 = sound
zonda r + engine stage 3 + turbo = no sound
zonda r + turbo = no sound
maybe it varies..