You won't want to run any serious antilag on your t3 if you want it to last more than 5 minutes really as the heat will kill it, unless you happen to have a maram shafted one?!! My last engine ran a healthy 245bhp on basically a stage 3 t3 at 1.5 bar, ideal for that power level imo without being overly laggy. T34 will have more grunt at the top end if that's your thing but probably not quite as driveable as the t3 in reality.