Chevrolet Performance has announced an all-new motor built especially for the new LS Stock racing class in the Chevrolet Performance LSX Challenge Series put on by the National Muscle Car Association (NMCA). This naturally aspirated 376ci DR525 crate engine is rated at 525 horsepower and will feature several tamper-proof bolts to ensure class compliance within the series.
“The all-new DR525 engine in the LS Stock class signals an important advancement for drag racing, delivering exciting heads-up racing at a lower cost than custom-built engines,” said General Motors U.S. vice president of Performance Vehicles and Motorsports, Jim Campbell. “It’s an approach we’ve implemented in a number of circle track racing series for more than a decade, providing racers a high-performance engine at a great value.”
According to the NMCA, “The LS Stock is a naturally aspirated heads-up class designed for 1955-and-later vehicles and is designed as a low-cost, entry-level heads-up class. All entries must compete on accepted suspensions and at the same base weight: 3,300 pounds … The class is an all-run, heads-up field using a .400 Pro Tree start.”
Here are the specifications for you horsepower mavens:
- 525 horsepower at 6,300 rpm and 489 lb-ft of torque at 4,400 rpm
- Lightweight aluminum cylinder block with six-bolt, cross-bolted main caps
- High-flow rectangular-port cylinder heads with 2.165/1.590 valves and high-rpm-capable beehive valve springs
- 10.7:1 compression ratio
- Chevrolet Performance ASA hydraulic roller camshaft with 0.525/0.525-inch lift and 226/236 degrees duration
- Lightweight composite intake manifold with 90mm throttle body
- Production-type cast iron exhaust manifolds, fuel rail and injectors, coil packs, wires and spark plugs, and LS3 water pump and damper
- A front accessory drive with alternator, drive belt, and more is available separately
- Two tamper-proof bolts incorporated on the intake manifold, as well as a tamper-proof bolt on the front cover and the oil pan
Even though the DR525 is the spec engine for NMCA’s LS Stock class, it should be legal in other NMCA classes. NMCA will be running four segments of the Chevrolet Performance LSX Showdown Challenge series for 2014, with the first LS Stock race take place in Norwalk, OH on August 21-24. You will be able to buy the crate motor yourself starting on August 1st. More information on the LS Stock class and complete class rules will soon be available at nmcadigital.com.