I got it back, i'm so happy, I really missed it.
Everything is sorted out now
new waterpomp, clutched modded alternator pulley, new serptine belt. Raised boost, advanced pump timing, lda is now at it's max. And NO black smoke.
Drives awesome, tons of low end torque, good midrange and enough top end (she keep pulling to about 5000rpm). Turbo spool up @ about 1500rpm, max boost @ 1700rpm.
Really good engine package now. We could go more extreme but a oilcooler would be needed. Had my oil up to 115°C/240°F when doing 100+ mph on the highway for about 15 minutes, that's fine, being on full boost all the time. GPS confirmed topspeed of 191km/u or 121 mph. Plenty fast for a mk2.