The two car’s are more similar than their different purposes would have us believe. Not only is the engine architecture similar, but the same block is the basis for both. The main difference is that, while the Z06 uses a 7.0-liter beast, the ALMS regulation limit capacity to just 5.5 liters of displacement.
In an effort to emphasize the fact that their cars have racing pedigree, Russ O’Blenes, the Engineering Group Manager, says that the ALMS engine is an evolution of the standard road-going car’s engine. Having similar goals of performance and efficiency, both engine are built in-house by a team of specialists.
All designing of the race engine starts out with a 3D CAD model that is created using the same software as for the Z06. Analysis and simulations are used to refine the design, after which casts are sent to the C&C machining center to be processed. Then they are sent to the assembly area, where the engine that ends up on the track is put together by hand by a skilled specialist.
Development of the 2011 engine started in October, with a clear emphasis being put on improved reliability, air flow efficiency and fuel economy. With ALMS regulations limiting the air intake to two 28-mm air scoops, the end product has to be even more efficient than last year.
We really loved the video, as it was very informative and interesting, so we hope Chevy’ makes some more soon.