goob, i said CT20 ma... never say CT20 and a ported eng. blowing 1.2bar of boost also :P
GroundZro, Easy, port the bugger, fit 2mm larger fins on the entry only (budget ma) & balance the turbo. If can afford it change the shaft to steel, and you can start boosting more.
Mine cost me about rm700 but i had to do it as my original fins were half past dead anyway. My mech. send the turbo to a turbo specialist, i also don't know where. But this is a cheap, reliable and 'standard' way to get more power... but if you considering getting max power out of the car you might want to change the entire turbo set up, it has more potential that way.
Remember when you change the fins you got the option of top end or acceleration you can't have both :-P
p/s i old man liau so only want to go standard :-)