Nitrous plumbing A1A...??..

Thanks jpar, that makes sense
The reason for less timing needed with nitrous or other forms of boost this because this makes the engine more efficient. I believe even more so with nitrous. Precise amounts of fuel and air can be brought into the combustion chamber in large volumes. The idea isn't to create more RPMs but just to create a better more efficient more explosive explosion..
Anyways in a perfect world the explosion would be a skippy bit after top dead center and propel the Piston down... But because our engines aren't that efficient in the explosion isn't that efficient it must be before top dead center to time for that explosion to happen... Nitrous and boost make that more efficient needing less timing...