HI,
Check all your turbo related hoses are tight, cant see it overboosting at 0.6bar.
check your spark plugs and gaps,also check the heated seat fuse in fuse box
as this enriches the mixture on boost conditions.also check ignition timing
advances remove ecu pipe from inlet manifold and blank off hole in inlet manifold
and with the car ticking over around 800-+50rpm, 12degrees btdc, blow down the vacuum pipe of the ecu silver ecu and the ignition should retard,, suck on the pipe and it should advance the ignition if not need ecu,

Dave.