I do not know much about boost. I would post some questions in the turbo section to ask about remapping for that. Bad in Black would be able to tell you about it and 1bad would know. Slowninja should be able to tell you about that kind of setup too. It just seems highly questionable that anyone would want to introduce that much air into the system with out remapping. I would guess the motor would run poorly and cook at the same time.
G1 - Flies open at 6K, pretty doggy below that. You won't even hit 6K all that much on the street so you are in old dog mode almost all the time but when you have the opportunity to let it rip, it will scare the p!zz out of you once the flies open.
G2 - Flies open 100% at 3.5K. Seems to work just fine for street riding and drag racers seem to often like to leave the G2 flies in for a controllable launch. I pulled mine on my G2 and there was no big dif. The bike had plenty of power from idle but when I hit 3 - 3.5K, I felt a surge of power that came on without openning the throttle more than already open. It is not a dangerour surge but it is a bit annoying. After adding PC with Fuel Moto map, the powerband felt more smooth but the surge is still there to some degree.
G2 also has stronger frame, 8 hole spray injectors instead of 6, revised piston/combustion chamber, 3 catatytic converters instead of 2 (and you will always have the 1 in the header unless you switch to full system or rip the cat out as some have done), is 11 lbs heavier than G1 and makes a bit less peak hp than G1.
'08 MIDNIGHT SAPPHIRE BLUE Now Deceased