Hi mate, just done one on mine (1999 AGU 1.8T)
This is what you should get. This was starting from cold (10C) and running at idle till warm, no acclerator pedal action!!
I also put the intake temp on there, but TBH it's a bit meaningless really...esp at idle, worth confirming the Inlet temp sensor works on a high speed run etc...
I logged group 3, the last two values.
Have you also tried logging your MAF (group 2)
You should get a nice smooth curve on full throttle from low revs like this...
You will flow a lot more air than me with your IHI setup!! But if it's jagged it higlights a problem with the MAF.
Also you may want to speak to Wilko about his investigations with MAfs in an IHI setup.
Hope this helps