I have updated the engine article.

http://www.370z.com/MagazineArticles/tabid/57/articleType/ArticleView/articleId/14/370Z-Engine-VQ37VHR.aspx

The update includes more information on Nissans exclusive hydrogenless DLC coating and a mistake in the exaust cam control section.  The VHR engine has a fixed, exhaust cam, like the GT-R, not moveable like the HR and rev up engines.  My bad.