According to my dyno results, the difference was about 12 lb ft of peak torque - between about 2700 and 3300 rpm - between the limited stock tune and the Tuneboy tune with the secondaries open. It doesn't affect peak HP.
I've just started toying with TuneBoy and by jesus I'm flying now. Well, not quite. I'm working up to full open in 1st and 2nd still. I tromped on it (apprentice style) in 2nd and went light headed RIGHT-NOW. YeeHaw. I'm holding off going full 100% until I get a new rear skin (8K) <cluck cluck cluck.
It's smooth, responsive, and did I say, "YeeHaw" Oh yeah, that's a Tourer with standard pipes and no stinky cat box.
Does anyone know of any way to contact tune boy other than the firstname.lastname@example.org or how long does it normally take to hear back from them? I sent them an email yesterday morning and have not heard back from them yet. I was wanting to order but before I did I wanted to see how long before they could ship it. I was going to order from newr3 before they closed for vacation, but they did not have any in stock and said that tune boy was running about 3 weeks behind in their orders.