The ability to induce the proper swirl frequency and depth of rotation is paramount to maintaining a layered homogenous mixture which will provide a lengthened primary burn followed by a rapid secondary burn, all of which will yield considerable resistance to detonation, greater over all combustion efficiency and fewer bad guys coming out the exhaust. The over all time of burn is so short and complete that the spark advance may be reduced to the extent that you're not doing as much "negative work", and the exhaust gas temperatures generally are in the 800 degree area, which means that the heat of the burn provided considerable better thermal efficiency, and something we and our competition noticed early on was the sound of the exhaust....it was almost a "whisper" rather than what you'd normally hear from an un muffled race engine. Admittedly, for people who have simply followed the rules governing pressure and detonation, trying the other way is risky business, and if you fail to pay attention to each part of the puzzle, you'll have trouble. Many do not want to know the numbers, which is fine because we'd never bother measuring static CR. CR. has nothing to do with the ability to burn effectively, the preparation and delivery of the mixture, and the shape of the combustion space and all the cam timing, intake design, header config., etc. mean everything.