will this do the same as a HT adjustment?... anyone had both??
Yes and no.
It will add more fuel to the engine, but the criteria for how much more at any given setting are different.
I say different, even though HT does not advertise what they do to the engine. but whatever HT do, it probably ads more fuel, as does the PCV. But HT claims that the engine will keep its ability to adapt to different cans etc. which means the HT job still relies on feedback from the O2 sensors (the O2 sensor is the only source for a feedback of richness of fuel), while the PCV will run the engine in a continous loop.
To get more power to the engine, the engine needs more air, thus, either choice will only give the extra power that you get from supplying a bit extra fuel to utilize unused oxygen molecules at any given time).
The PCV requires the disconnecting of the O2 sensors. This means its based on adding fuel based on a map only (unless you add Autotune). Unless you use a Dyno run, a generic map will have to do.
It boils down to the following:
-- Both options gives the engine more fuel for smoother running.
-- HT is hidden, no external parts. PCV adds extra components.
-- HT is harder to remove, while PCV is simple to remove (for whatever reason)
-- HT will probably give only the extra fuel needed, expect PCV to give extra fuel, and then some (unless you add Autotune).
Not part of the question, there is the third choice, AF-XIED, that will probably perform as HT, but also requires external mounting.
Next question: Adding both.
That would be a mess and a total waste of money.