Unless u want your car to be a full track car...Unless you are willing to spend more on the internal part (upgrade to performance part), go for average turbo setting for reliability..
i think the preve engine and turbo at its limit...try put bigger turbo may blow ur engine..maybe u can put better ecu management or better exhaust flow..ie 2.5 inch or throw away ur catalyc converter...hehehe..(not friendly environment)
Paging Madman, paging Madman, please share your DIY radiator flush with coke here. I'm curious to know the history and reason behind using coke and how well it worked!