Still coming up too short to even hope to match Zoom's speed, out of desperation, Barry put together a speed equation that when applied to him would help him out match Zooms speed. Barry decided to go back in time to learn the answer from the only man to ever figure it, his old mentor, Eobard Thawne. It hasn't been looked into further since then.
It wasn't really delved into on how one would go about applying it to increase their speed. Eobard called it an "unorthodox approach."
Behind the scenes
- In DC comics, Jesse Quick and her father, Johnny Quick, gained super speed from the visualization of the speed-formula, which is 3X2(9YZ)4A.