do the piper cams have the oil ways for the vvt?
I've got a turbo'd st170 engine which will hopefully be up and running in the next coupe of weeks. I intend to do a lot of testing with the VVT, so will have more info then. I suspect going from one range to the other may leave u a slight hole in the mid range, but give more power than fixing the timing. Don't forget, the std pulleys are adjstable. You can swing the VVT pulley too, just make sure there is no power to the solenoid, as this keeps it in the fully advanced position which is whatever you set it to, eg 109 degrees.
Rick.