What you want is more torque, for a daily driver that porbably only does pulls from the lights. You're not after mad killerwasps yo.
Just sort whatevers wrong with it to get it to 220kw, or find a dyno that tells you its 220 as is.
Or just go E85 with replacing the whole fueling setup then hit 260 on that standard turbo and just buy drums of E85. Easy.
Like for the cost of buying a slightly larger turbo to get 250, you may as well just buy boons holset and chuck that in to save you time, money and heartache.