Greg, my first tip for you is to have them print off or have them save on a disc for you and excel type spreadsheet of everyone of your dyno runs with the hp, tq, and AF at every 100 rpms. they will NOT do this unless you ask. This is a mcuh more valuable tuning devise than a graph. My tune saves them for me on a disc so I can review them and compare them at home as I need to.
As for AF, NA cars typically like somewhere between 12.5 at 13.5. My car liked around 13.5. I don't have a tweecer so I can't help you with what to tune with in it, but I tune mine with the WOT_FUEL_MULTIPLIER in my eec tuner. If you have your sprak maxed out, try setting the global spark adder 1 degree less and 1 degree more than where it is now. On the graph and peak versus peak you may not see a difference, but when you line up two runs side by side in the excel file like I said, you'll see which one yields more power and where. This can help you to fine tune your timing tables by adding a little more or a little less where needed. This can be very time consuming, so you may want to gather as much info as you can, go home and look over your notes and the power it made at every 100rpm and come up with a new timing table. Also, typically adding timing tends to lean the car out a little. I was always told its best to get the timing right first before fine tuning the AF mixture due to this very reason. Hope that helps somewhat.
