Well I installed my Wizaired yesterday, man you can really hear the SC with that 4"x9" K&N! I did some before and after testing measuring MAF (lb/min) and Boost and here's the results, I averaged 3 runs Before and 4 runs after, all from a standstop to approx 60 mph
Before
Barometric 14.3 psi
Temperature 63 F
MAF - 28.4 lb/min
Boost - 7.5 psi

After
Barometric 14.3 psi
Temperature 70 F
MAF 29.2
Boost 8.2

So you can see bigger filter let the stock pulley draw more air and supply more boost. To be honest I was expecting a bigger increase, but I suppose that might mean the stock filter is suited for the stock setup and the bigger filter will be optimized with the 3.4" pulley.

[img]http://picasaweb.google.com/michael.w.ra...355792722920370[/img]

http://picasaweb.google.com/michael.w.ra...355805607822274

hmm...guess that picture deal didn't work...can anyone tell me how to post pictures?
Thanks.

The only way you'll see some results is a dyno. Given those numbers you gave, each run has way too man variables for you to detect gains or losses.