Originally Posted by gibbo frst

the car originaly had a scorpian system with a real small rear box and a big middle box which was blowing due to hitting my driveway so i chopped it out and put a pipe in its place.. with my old turbo t34 it would still peak at 32psi then drop off and i changed this to a turbo technics t38 and i could not get the boost to go over 24psi. i was told to try a std exhaust cam instead of the bd10 but also could be lack of back pressure in the exhaust. it was easier to get hold of another exhaust but was for a 4x4 so u used the rear box as is a lot larger than my original and mated the new center section with box in onto my down pipe.. first drive up the road and the gauge flew straight to over 30psi wher as before would not get anywhere near that.