Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Craigslist catch: 1986 Lotus Turbo Esprit

For the masochistic car enthusiast--and many of us here at AutoWeek count ourselves among that breed--nothing is sure to tantalize and frustrate quite as nicely as a Lotus. Not just any Lotus, mind you, but a peaky, force-fed, emissions-saddled 1986 Turbo Esprit. The example shown here, http://detroit.craigslist.org/okl/ctd/2318628863.html, appears to be a fine specimen of Giguaro's wedgy Brit, and the rear-quarter decals indicate that this is a late HCi model--high-compression plus Bosch fuel injection.

Tomorrow’s world: Fiat's MultiAir engine tech

By Jesse Crosse Motor Industry 14 October 2009 16:50 Fiat this year launches what it claims is a big step forward in variable valve timing: MultiAir. It's the first time that a manufacturer has made a properly variable valve system a production reality, and will slowly be rolled out across most of Fiat's and Alfa's car ranges.How does Fiat's MultiAir vary from existing variable valve timing (VVT) systems?Current VVT systems rely on mechanical systems to open and close the valves. Engineers have long understood the benefits of changing valve opening and closing times to tweak an engine's power and emissions performance, depending on the need for power or parsimony.Valves are an engine's nose and mouth – it inhales through inlet valves and exhales through exhaust valves.

F1 2014: the six big engine questions

By Tom Clarkson First Official Pictures 14 March 2014 11:30 The workload has never been greater for Formula One’s 11 teams. They’re finalising preparations for the biggest shake-up in F1's technical regulations this century. A new engine formula for 2014 will see the current 2.4-litre naturally aspirated V8 replaced by a turbocharged 1.6-litre V6 with a much greater dependency on energy recovery (ERS).