I concur with Pat. From my experience I have found that increased airflow via less restricted intake and/or less restricted exhaust requires that the screws be turned out to compensate at low throttle.
I recently installed a Freak kit. Before the Freak I had ran the following setup: Staintune exaust, snork out, 45 pilots, 138 mains, 3 turns average ( I fiddle with the air mix screws a lot. I tried 2.75 to 3.25)
After adding the Freak I now run 45 pilots (same as before), 150 mains, but I found that I needed to go to 3.5 turns to compensate for the increased air flow. I was even running 3.75 turns for a while, but that seemed a bit extreme. I might try installing 48 pilots so I can bring the air/mix screws back to around 3 turns.
This tells me that turning the mix screws out (counter-clockwize) will introduce more fuel and richen the mix.
Just my 2 cents.
Cody