O.K. guys and gals, here we go ..... (assuming you have the supporting engine, transmission, fuel system modifications)
No matter what, you must tune for the shot. Also, I recommend anything over a 40 HP you need to be using an appropriate race fuel (or E85). Anything over 80 HP, race fuel and timing control a must.
small shots (~60 HP or less on a Busa) works very well fogging the box if setup correctly. Fog in the ram tubes (both sides) and blow though a high flow air filter. The downside of this setup is on longer runs the air filter can ice up and the bike goes über rich. Upside is they are easier to install and normally make more HP than they are jetted for.
Spray bars are not what they are all cracked up to be. Some of the better known bars have a huge design flaw, they spray uneven and dump most of the spray into #1 cylinder. Not only does the engine run unbalanced, but the lean on a cylinder or two and rich on the others. I see this all the time on the dyno. eg, a 100 HP shot makes 87 HP on the dyno. The only reason they are around is the bikes "survive" a quick 1/4 mile pass most of the time.
I personally use the stuff from WON, I know there has been a lot of testing to get the systems balanced.