I just stuck a spankin new head on my 300 as mine had cracked and also scored a new Turbo as the old one was filling the intercooler up with oil on a weekly basis and appeared to have no blow. New Turbo fitted and it seems to have a bit more poke but it still doesn't start to come on boost till 2200 rpm and is at full chat at 2500 which I don't think is right. A mate of mine has a 300 which boosts 500 rpm earlier. I've checked all the hoses (most of them I've replaced anyway) and they all seem to be fine. Is it boosting too late or am I expecting too much.