Re: xr6 vct ecu into non xr6????
IME with the EL ECU (standard VS XR) there isn't much difference between the two on my XH.
Mine idles only slightly better with it (idled good with the standard ECU anyway), and throttle respone is improved by a small amount (which was also good before).
Other than that, they feel identical, and I'd say peak power has changed little, if any.
Unless the AU had a vastly different ECU from standard to XR, then it would be a similar transition.
4L I6, naturally aspirated producing 173.5rwkw.
14.410 @ 96.49mph with street radials.
What's that?..... Did I hear you say TQE power?