Can you edit your first post with one section of it being your ideas and the section below it being exactly what your going to do?? Im not saying this to be a Di*k in anyway, but this would be great for everyone to see so if they do decide to go a certain route then the answers are right in front of you.
Why cant you do 12.5mm pistons? Is it because your using the GTI-R bottom end? Is it because you would be limiting your higher hp goals even though you will make it there with less boost? Or c16 in the tank just costs too much? etc etc..
I feel you can do what you want to do.. Just saying you talked to mazworkx and they said it "cant be done" doesnt make any sense either. WHY? It might not make sense or have the best results OR it just might have the greatest results yet idk.
And this whole VE bottom end doesnt have enough strength to handle 650whp? IDK what your trying to say?? Are you saying stock for stock? IF thats the case ofcourse because of obvious reasons, but if your building either one or the other they will handle it..
Im just trying to get what your saying thats all. This thread is starting to sound like a girl trying to pick out her prom dress. No offense at all, I just wanted to see a high comp turbo pulsar gti-r making 500+hp ?!?!!
Good luck with your build. I'll def be watching for updates