The instant invention includes systems for and methods of maximizing efficiencies in an internal combustion engine while minimizing costs and weight for the same and while also minimizing maintenance requirements for the same. Such systems include a compression assembly for compressing fluid to a desired pressure for combustion (such as above 220 psi) and a combustion assembly configured to receive at least a portion of the compressed volume of air for each power stroke. In this way, the power stroke of the engine is independent of the compression stroke of the engine, thereby eliminating or otherwise minimizing transitional losses associated with the same.