It's doing good.I have changed the wheels of my alfa, in this case fitted a Sparco Assetto Gara, it's a light wheel compared with the 7 spoke horseshore. This ones weights 9.12kg and the alfa 13.16kg each.
Because lightweight wheels make diference in acceleration i decided to make the exact same tests and show here.
Only issue is your not using either Dragy or Vbox for those measurements.
They could be slighly downhill, and more than likely stopwatch not started at exact km/h, since speedo will always show incorrect.
So yours "non validated" best times is:
60-100 km/h 3rd: 3.06 secs
80-120 km/h 3rd: 3.65 secs
80-120 km/h 4th: 4.86 secs
Vs the validated Dragy runs from my old K04 TBi:
60-100 km/h 3rd: 3.08 secs
80-120 km/h 3rd: 3.31 secs
80-120 km/h 4th: 4.38 secs
My experience so far with the K04 turbo upgrade on the TBi: Spool is now a little later than with the K03 (expected) When on spool there's a lot more power than previous, and this power just seems to go on and on. Before the power came in low and kept on strong to mid rpm range and then faded...
You should really get hold of a Dragy or Vbox to confirm your runs.
Then do an a additional 50-130 km/h measurement and post fastest time possible.
The 50-130 km/h time gives a really good indication of a cars power.
My K04 159 TBi
50-130 km/h : 6.66 secs
Wifes old Alfa Romeo Giulietta 1.4 MA 170 TCT
50-130 km/h 10.4 sec.
My new stock Giulia 2.0 TB 200 hp
50-130 km/h : 8.88 secs