so i have a 97 f150 4x4 that had the 4.6 sohc engine i put a 4.6 dohc engine in it.
i have felt no power gain at all put a new plugs wires fuel pump filter etc in. i feel like im driving the sohc 4.6. is there anything i can do to try and harness more of its power? its 0-60 time is is like 11.50 seconds the engine runs great , i just dont know why its not making the power it should any sugestions? i want to get it on a dyno but there is not one anywhere close. if anyone knows one near fortdrum or watertown ny please let me know thanks

Also I used the wiring harness and computer off the 2v (original engine)

 

What year motor did you uses?
What is the rated HP of the motor?
Does the original PCM have the same ignition and fuel curves in it's program that the DOC motor PCM has?
Have you looked at the live timing and fuel data with a Scanner to see if it is running in the limits expected?
The program is custom to the motor design for items such as compression, cylinder head combustion chamber design, intake breathing improvements, the weight of the vehicle it is used in, the transmission it is used with etc etc.
There is more to all this than just swapping motors.
It may run smooth and well on your original PCM but max power won't be realized until some of these items are investigated and changed.
The engine designs are dynoed at the research facility to finalize the program to meet overall use in the vehicle it will be used in.
When you break this design chain, expect the motor to respond differently even tough it seems to run ok..
I don't have your answer but these are the items that are involved.
This is much the same as if you installed a supercharger on an NA engine then lost it because the ignition timing was too fast a curve and broke a piston from detonation because it was not properly dyno tuned.
Good luck.