Highlights in this issue include a dossier on the Carpenter Racing's Castrol Rocket engines as well as insights into the Formula one V8 performance factors & the Audi A6 turbodiesel 2014. In conversation with David Lapworth, a look into JFR nitro motor development & the Pat Musi pro mod EFI mountain motor. As well as focus articles covering bearings, pushrods, rockers & lifters.