I'm staying off the bottle until I can get a dedicated fuel system for the NOS. The Walbro is supposedly only good for 550 HP so trying to coax another 300 HP will never work with the stock setup. I wonder if going up to a larger throttle body will help. Even the 6.0L LS2 gets a 90mm. I think my 6.7L deserves a little larger TB than that even. Maybe a 100mm?