The lag on the turbo is actually not all that bad. When I datalogged MAP voltage vs rpm, I saw that the 3 bar MAP sensor was pegged at 4400 rpm. So, that means boost passed 29 psi by then :D So, for this size turbo, the lag really isnt all that bad. In short, if you at anything over about 3500-3600 rpm and you hit it, the car will take off quite quickly. If you are over 4000 rpm and hit it, the boost ramp up is instantaneous. The engine rev limit is 7500 rpm, with a "soft" limiter at 7200 rpm so theres a pretty good powerband available.