My car runs a t4 turbo at the moment and its fine, Good power delivery, not too laggy and works quite well

But it is pretty much too its limits. The engine and pretty much everything else is uprated for more power and ive been thinking about going to an externally gated gt35

and i wondered if any one had any comparrisons between the two turbos i.e. would the gt35 be hurrendously laggy compared to the t4 and would it still be as nice to drive from day to day
Thanks in advance and your opinions are most appreciated
Steve