Can i ask what you base this on? Not being cheeky or confrontational just want to know why? People get a remap done mainly for a boost in power and/or fuel consumption, as i'm lead to believe both can be achieved with the 1.5.
Speak to your local Audi/ VW tuner to get the best ideas of what is possible… A quick look on the Revo site suggests some gains with just stage 1 software. Stage one with a panel filter should be fine with no issues but speak to the experts who do this sort of thing daily.
Keep your shirt on lad. I overlooked that point. Only asking as i still have my old 2.0ltr tdi in the family which had a quantum remap which i was very pleased with. When you say the engines are too weak, how do you mean?
I read many peoples thoughts on doing it to the tdi and many mentioned that various parts would need uprated?? Still going strong now 3yrs later...