My next question would be does the addition of tuning like a SAFC improve the results of the tests.

The article is basically telling you that you have wasted your time and money. The intake needs cold air from OUTSIDE the engine compartment to be effective.

If fuel and spark are not optimized doing so will definitely increase power. That said, that is not the lesson about the resonator.

Cold air is ALWAYs desireable. However, that is not what the article is saying.

I'd say go back to stock.

I just went back to stock and I have to say that I immediately felt a difference in the power....
In the best of my efforts and research and feel, I have concluded that for my car, the stock intake offers more power than the K&N FIPK....
BUT.... I miss the whistling sound that my car made when I was accelerating!!!
Thanks guys for all your help!

Here is the custom intake tested on the dyno day. It was sucking hot air, but we compared it to a standard airbox and a new filter with the lid open which was also sucking hot air. The cars went worse if anything.
So the custom intake is good for:

1. looks
2. noise
3. see the engine better
4. nice dress up part
but not for performance. And no pod filters as well as the standard filter. Even the good quality K&N isn't as good (I have read the Society of Automotive Engineers test on filtration, paper beat K&N for filtration)

I beg to differ.