The remapped 180 makes around 300Nm, not 300lbft. But then again, I'm running 270lbft on stock turbo. BUT, at what RPM is that peak torque.
Never heard of anyone uprating the K03 internals. Out of interest, why didn't you just go disco potato? Cost of manifolds new downpipe etc??
Have you also got a 4 bar fuel pump to match the reg? (not a total necessity as the 3 bar pump generally puts out a touch more than 3, but if I was anywhere near 300 I'd have one!!
Not sure what injectors you've got in your AGU mate, but injectors on mine (AUQ) are only rated to approx 240bhp. I totally agree with 440cc injectors!!
Strange how chippeduk couldn't map it though. why don't you take it to somewhere like custom-code - someone who specialises in big-turbo conversions!!!
P.S. there is more technical knowlege on seatcupra.net - the tuners seem to be quite hardcore LOL Might be a good place to post your question mate!! (Sorry uk-mkivs)