How many 1/4 pass's you get off the 2 lb bottle and at what Hp. NoS is starting to look nice, thinking of doing a small 20 hp shot wet kit. Dont know much about NoS so thinking wet might be safer, dont want to have to load 2 maps either but not sure.
I've only been to the drags once since my install. I made all my runs except the last one without the bottle. I needed the practice and was seeing how fast I could go without the juice. So, I can't accurately answer your question. I will say that the 2 lb lasts much better than I thought it would. Not bad!
My system is a dry system. I use a #36 jet in the solenoid with a split feed line in each air intake. #36 = approx. 40hp The dry nitrous is fine and I've had no problems with it's operation. I run a PCIIIr with the map fattened up from 6,500 - 11,000 rpm at WOT. My nitrous engagement is set to come on @ 7,000 and off @10,600 rpm. Even with the nitrous not being used, it still performs well even though I may have a slight hp loss due to the fuel system being rich up top.
Also, do you constantly run or shift past 6,500 - 7,000 rpm on the street with your Busa? Yea, sometimes I do but it's not a problem with the rich map.
So, don't worry about using a 2lb bottle, (plenty of go-juice), don't worry about running the rich map, and don't worry about a dry system. Just go for it and see what you've been missing out on!