Auto Car | Chevrolet Impala SS Car of Tomorrow in 2007 | Featured car racing series premiere NASCAR racing began to design all-new racing car in several places during the 2007 season. in this season of this vehicle dubbed the Car of Tomorrow (COT), this 'universal' race car designed to bring new safety innovations to drivers while also increasing the competition during the race. COT is also aimed at driving down costs for race teams, as the basic design makes it adaptable to various tracks, which means the team can build fewer cars for the season.
On March 26, 1955, the world of stock car racing changed forever. On that memorable day, Fonty Flock drove Frank Christian's 1955 Chevrolet to victory in a 200-lap Grand National race on a dusty half-mile oval in Columbia, S.C. It was Chevrolet's first NASCAR victory and the first major win for the legendary GM small-block V-8. It would not be the last.GM has produced nearly 90 million engines based on the small-block design – and a fair number of them ended up on race tracks. In fact, the GM small-block V-8 is the most successful production engine in motorsports history. This lightweight, high-revving engine dominated stock car competition for decades, eclipsed only during periods when the rulebook favored big-block powerplants.GM engineers kept the small-block V-8 forever young wîth a steady flow of new heavy-duty components. Improved blocks, free-breathing aluminum cylinder heads and forged-steel crankshafts maintained the little Chevy's place on the cutting edge. But as the all-conquering small-block approached its 40th birthday in 1995, GM Racing engineers realized that the venerable motor was reaching its limits.Work began on the small-block's successor, designated 'SB2' – shorthand for 'Small-Block – Second Generation.'
First presented to NASCAR officials in October 1995, the SB2 finally won approval for Nextel Cup competition at the start of the 1998 season. The SB2 was subsequently introduced to the Busch Grand National and Craftsman Truck series. The SB2 is a comprehensive engine package that was designed by GM Racing to improve durability,simplify preparation procedures and reduce the overall cost of building and maintaining a stock car racing engine. In short, the SB2 makes state-of-theart technology affordable and accessible.'The SB2 marked the first time in the history of the GM small-block V-8 that a package of engine components was specifically developed for NASCAR racing competition,' said Jim Covey, NASCAR engine development manager for GM Racing. 'GM had never designed a cylinder head specifically for a single four-barrel stock car engine. When the SB2 project began in earnest,we had an opportunity to make a significant improvement over existing engines.'The SB2's valves and intake runners are positioned to provide a direct line-of-sight path from the carburetor to the combustion chambers.
All eight intake ports are angled toward the center of the engine; the runners that supply the front cylinders are a mirror image of the ports that feed the rear cylinders. This innovative valve layout led to corresponding revisions in the small-block's camshaft, intake manifold, pistons, headers and valvetrain.The SB2's two-piece intake manifold comprises separate castings for the plenum/runner assembly and a lifter valley cover that incorporates the water crossover,water outlet and distributor mount. This two-piece design simplifies at-track service because the manifold section can be removed without draining the coolant or removing the distributor.When GM Racing engineers set out to build a better small-block, they enlisted the aid of NASCAR teams who build literally hundreds of competition engines every season. This partnership between racers and engineers benefited both groups. 'By working wîth GM teams from the very beginning of the project,we were able to meet their concerns about service and reliability issues that we may not have considered as designers,' Covey noted.Although the SB2 is firmly rooted in the classic small-block architecture, it is a purposeful and thoughtful revision designed specifically for NASCAR stock car racing.Working within the boundaries established by the rule makers, GM Racing created a two-valve pushrod V-8 for the 21st century.
Original Post : www.conceptcarz.com
On March 26, 1955, the world of stock car racing changed forever. On that memorable day, Fonty Flock drove Frank Christian's 1955 Chevrolet to victory in a 200-lap Grand National race on a dusty half-mile oval in Columbia, S.C. It was Chevrolet's first NASCAR victory and the first major win for the legendary GM small-block V-8. It would not be the last.GM has produced nearly 90 million engines based on the small-block design – and a fair number of them ended up on race tracks. In fact, the GM small-block V-8 is the most successful production engine in motorsports history. This lightweight, high-revving engine dominated stock car competition for decades, eclipsed only during periods when the rulebook favored big-block powerplants.GM engineers kept the small-block V-8 forever young wîth a steady flow of new heavy-duty components. Improved blocks, free-breathing aluminum cylinder heads and forged-steel crankshafts maintained the little Chevy's place on the cutting edge. But as the all-conquering small-block approached its 40th birthday in 1995, GM Racing engineers realized that the venerable motor was reaching its limits.Work began on the small-block's successor, designated 'SB2' – shorthand for 'Small-Block – Second Generation.'
First presented to NASCAR officials in October 1995, the SB2 finally won approval for Nextel Cup competition at the start of the 1998 season. The SB2 was subsequently introduced to the Busch Grand National and Craftsman Truck series. The SB2 is a comprehensive engine package that was designed by GM Racing to improve durability,simplify preparation procedures and reduce the overall cost of building and maintaining a stock car racing engine. In short, the SB2 makes state-of-theart technology affordable and accessible.'The SB2 marked the first time in the history of the GM small-block V-8 that a package of engine components was specifically developed for NASCAR racing competition,' said Jim Covey, NASCAR engine development manager for GM Racing. 'GM had never designed a cylinder head specifically for a single four-barrel stock car engine. When the SB2 project began in earnest,we had an opportunity to make a significant improvement over existing engines.'The SB2's valves and intake runners are positioned to provide a direct line-of-sight path from the carburetor to the combustion chambers.
All eight intake ports are angled toward the center of the engine; the runners that supply the front cylinders are a mirror image of the ports that feed the rear cylinders. This innovative valve layout led to corresponding revisions in the small-block's camshaft, intake manifold, pistons, headers and valvetrain.The SB2's two-piece intake manifold comprises separate castings for the plenum/runner assembly and a lifter valley cover that incorporates the water crossover,water outlet and distributor mount. This two-piece design simplifies at-track service because the manifold section can be removed without draining the coolant or removing the distributor.When GM Racing engineers set out to build a better small-block, they enlisted the aid of NASCAR teams who build literally hundreds of competition engines every season. This partnership between racers and engineers benefited both groups. 'By working wîth GM teams from the very beginning of the project,we were able to meet their concerns about service and reliability issues that we may not have considered as designers,' Covey noted.Although the SB2 is firmly rooted in the classic small-block architecture, it is a purposeful and thoughtful revision designed specifically for NASCAR stock car racing.Working within the boundaries established by the rule makers, GM Racing created a two-valve pushrod V-8 for the 21st century.
Original Post : www.conceptcarz.com
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