Ultra was the codename for
General Motors
The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and ...
' next-generation family of
DOHC V8 engines that was being developed to replace the
Northstar as the V8 engine of choice for GM's premium vehicles. There is very little information on the engine's specifications currently available, however its lowest
displacement would presumably have been similar to the Northstar's, (with higher-displacement versions probable as well), and it would very likely have incorporated technologies from the
High Feature V6 family, including continuously
variable valve timing on both intake and exhaust ports, as well as provision for
gasoline direct injection
Gasoline direct injection (GDI), also known as petrol direct injection (PDI), is a mixture formation system for internal combustion engines that run on gasoline (petrol), where fuel is injected into the combustion chamber. This is distinct fro ...
. These engines would probably have been adaptable for both
longitudinal and
transverse applications (the latter would have been used by the rumored V8-powered versions of the
Lambda crossover SUVs).
Despite previously revealing plans to allocate production to the
Tonawanda Engine plant, GM canceled development of this engine in January 2008.
The 2013
Cadillac Elmiraj
The Cadillac Elmiraj is a concept car created by Cadillac and unveiled at the 2013 Pebble Beach Concours d'Elegance on August 15, 2013. It continues the development begun by the Cadillac Ciel concept car. It was named for the Elmira, New York, a ...
concept had been confirmed to be powered by a twin-turbo 4.5L V8 that was based on the twin-turbo 3.6L V6 engine.
See also
*
List of GM engines
*
Northstar engine series
*
GM High Feature engine
*
Cadillac twin-turbo V8
References
External links
Motor Trend ArticleReplacement Engines
Ultra
V8 engines
{{automotive-part-stub