appreciate all the replies.

i was thinking that since the exhaust housing was the same then the restiction through the engine would be the same at say 2 bar @ 5k with either t34 or t38, and that the bigger ultimate pumping ability of the t38 would be only relevant at 'unmapped' areas such as 2 bar at 7k? anyway just talked to Ut and they say that the exhaust housing gets machined anyway and they fit a diff turbine wheel so even if my theory was correct the premise was wrong

new t34 it is then, will be for sale in early 2007