Thanks for you input Mattye.
Unfortunately I do not have the time nor cash to have before and after dyno runs. I prefer to go by real world test such as
If the car can hold a certain gear on certain inclines on my way to work after the spacer compared to it's inability to do so prior.
If the car can pull up various inclines with changing gears and without accelerator position changes
The difference in the cars ability to drive off boost in different areas
The turbo will not spool later, as more air is getting sucked in, meaning more air is sent through the exhaust manifold which means it would be travelling at a slightly increased velocity and past the exhaust wheel of the turbo, please explain to me how this will cause extra lag? Also please note that in my original post I specifically noted that the turbo spooled 200rpm earlier. This is from experience and not theory.
Also, as stated, it is more a "round out" type of mod which makes the car a bit more comfortable and predictable to drive.
I have not made any power claims whatsoever, nor will I. The "increase in torque" statement comes from 3 sources.
1. ME and my knowledge of MY car in real world circumstances
2. My front axle torque gauge (it certainly is a fair bit more active in the dry now)
3. The fuel leaf screen to make sure that my foot is actually remaing steady during such tests
So my experience flies in the face of what a tuning shop tells you. Maybe if you talk to other tuning workshops their opinion may differ from what you have been told... or it may remain the same.
Regarding your plenum conundrum, would the Greddy unit have shorter runners and the Plazmaman unit retain the stock runner by any chance? This could possibly explain the 400rpm spool difference.
Keep in mind that the design of the plenum is vastly different on an I6 than a V6.
Also note that my car is not like a "cop in shit" but rather a "p_i_g in shit"... ridiculous