Don't think you will really feel that big of a difference, unless you dyno it and see the numbers . But yeah as the others said, up it to 1bar and see that it's fueling good. Also if you're going to up the boost, you'll probably need a bigger intercooler. I ran a td04 for a while on a P&P (Sard) and it fueled perfectly, only removed it because of the 8500 rev limit..