A couple of years ago, I posted this link http: //www.somender-singh.com/ here on BITOG, but it was only negative comments about it.
Maybe it could be worth looking into?
He seem to have an idea about Nitrogen in the combustion process, is somehow good.
The advanced design for combustion chamber has been implemented nowadays that is better than groove. Improper groove will lead to carbon deposit that may "glow" and detonate the engine