Q. What is a Hemi? A. The design of the combustion chamber influences how well an engine breathes–how efficiently the air/fuel mixture enters and the exhaust gases depart. The combustion chamber also ...

HOT ROD’s archives are chock-full of brilliant tech reports that truly are timeless. This one, drafted by Jim McFarland for our February 1972 issue, provides an extensive look at how important airflow ...

A new design in engine pistons is increasing fuel efficiency and reducing particulate matter in Volvo Trucks North America’s heavy-duty D11 and D13 engines, the company said. The patented “wave” ...

However, not all innovations are equal, and nor do they follow a constant upward trend. Instead, their evolution takes the form of an S-shaped curve that reflects their typical lifecycle from early ...

Ferrari has signaled a willingness to challenge one of the most fundamental assumptions in engine design by filing a European patent for oval-shaped pistons, a move that could reshape how future ...

Sandia National Laboratory led by Sandia researcher Peter Van Blarigan that has been testing physical components of free-piston engines which could be 50% efficient. This is about twice as good as ...

As an alternative to the standard aluminum piston construction a gallery cooled one piece (so called Monobloc) spheroidal graphite cast iron piston has been developed for use in heavy duty Diesel ...

Antony Ingram April 30, 2014 Comment Now! The concept of range-extended vehicles--electric cars with a gasoline generator to extend their range--is an intriguing way of combining the benefits of both ...