yeah it needs a fucking good drive mate
i think what matey means is back pressure, to little back pressure doesnt help so im told, but i dunno mate, i got a big bore exhaust on mine and untill i got a recon turbo (didnt need it for mine but swapped it

) it didnt make a diffeence.
now ive fitted yet another all is well, well, we will see when i get it on road but i only paid £30 for a good turbo so if it dont last long not much lost