Like much in life, the difference between detonation and pre-ignition, and their effects, comes down to timing. Both refer to a situation when an engine's fuel/air mixture combusts at the wrong time, ...

Pinging—that sound that resembles pebbles being thrown on a tin roof—has become familiar to all of us as a common occurance with today's low-octane fuel and reduced engine speeds. Call it pinging, ...

Detonation is a supersonic combustion wave, characterized by a shock wave driven by the energy release from closely coupled chemical reactions. It is a typical form of pressure gain combustion, ...

There have been published papers by the Air Force Research Lab and NASA on rotating detonation engines having 10% or more efficiency gains. A rotating detonation engine (RDE) uses a form of pressure ...

Essentially, it's a rotating detonation engine in which the detonation wave is stabilized within a high-speed rotor. A precisely shaped flow channel within the rotor compresses the air-fuel mixture to ...

Striegel's 461-inch (454 + .030) El Camino shop delivery vehicle originally had a so-called 12.5:1 LS7 crate motor that, in unblueprinted form, really developed a true 10.9:1 CR. Even so, it would ...