[mattd200]

Hi,
I recently replaced my 3.4L in my 2006 Cayman S w/tiptronic with a 3.4L from a 2008 Cayman s w/ manual. It was a 50k mi drop out from a wrecking yard. I swapped out the wiring harness and bolted it up (with a new torque converter) It seems to run perfectly except for the fact that it dramatically lacks power in the midrange, ~2500-5500 rpms. Any insights? Valve adjusters are clicking and so are the intake tube butterflies. Computer? I sort of assumed I wouldn't need any computer changes, am I wrong?
Thanks
Matt, first time poster.