THIS is the type of Boost Bottle I think he is refering to. It has nothing to do with Nitrous. What the Boost bottle is SUPPOSED to do, is store up a small amount of backpressure, which helps on low end acceleration. I don't know if I would say it DOESN'T work, but I have never seen before/after effects when one is installed. There are some High end engines that have a Boost attached. On an old Picco O-1 comp engine I had, there was one from the factory. Rather than use a seperate bottle, they used the opening in the backplate (The hollow spot on Bump-start engines) as the boost bottle. The nipple that attached the hose to the backplate area broke off, so I plugged the line to keep from having an air leak, and did notice a bit of a difference.

I would suggest that if your engine doesn't already have this installed, don't hack up a perfectly good engine to add one. Unless you are confident with your engine modding abilities. It is too easy to mess up a working engine if you make a mistake, and it WILL void any warranty that your engine carries.