I may have answered my own question, IMMO is in a separate chip so should not be a problem.
I believe the camplate in the pump to be different in AHU to AFN.
Will there be any issue running on standard AFN map to begin with? I will be fitting the .205 injectors from the AFN.
I have an Audi A4 with a 90hp AHU engine.
Have been doing lots of reading on the forum with regards to swapping over to VNT.
I should be able to get all the parts fairly cheaply from an AFN Passat B5.
Every conversion I've seen has had a custom tune to run the VNT.
My question is...