Spotlight: Chevrolet Performance 525HP LS3-Based 376ci Crate Engine

Getting involved in racing is painfully easy now, especially when performance powerhouses like Chevrolet Performance are backing your racecar for power. Chevrolet Performance is no stranger to the aftermarket. They practically invented it. For Circle Track racers, different classes requiring more power call for different engines. In this case, Chevrolet Performance designed an engine for the Super Late-Model-type cars. Thankfully, we found a feature on this all-new powerplant over on TheBLOCK.com, your source for everything Chevrolet in the industry.

CT525 At A Glance

  • Power: 525 HP at 6,700 RPM, 471 ft. lbs. of torque at 5,000 RPM
  • Displacement: 376ci, 6.2L
  • Bore x Stroke: 4.060 x 3.620-inch
  • Compression Ratio: 10.7:1
  • Recommended Fuel: 92 Octane
  • Block: Aluminum with 6-bolt cross bolted main caps.
  • Crankshaft: Nodular Iron
  • Connecting Rods: Powdered Metal Steel
  • Pistons: Hypereutectic Aluminum
  • Camshaft: Steel Hydraulic Roller Tappet
  • Cam Lift: 0.525-/0.525-inch intake/exhaust
  • Cam Duration at 0.050-inch: 226/236-degree intake/exhaust
  • Lobe Separation: 110 Degree
  • Cylinder Heads: Aluminum LS3 style rectangular ports.
  • Combustion Chamber: 68cc
  • Valves: 2.165/1.590inch intake/exhaust
  • Rocker Arms: Cast roller trunnion, 1.7:1 ratio
  • Balance: Internal
  • Reluctor: 58X
  • Maximum GM Recommended rpm: 6,700

Case in point, the CT525 (PN# 19271821). It’s based on the latest production of the now-famous Gen IV family of GM small-blocks that power the C6 Corvette. The CT525 is a 376ci all-aluminum LS3 that sets the bar with a new standard of power and affordability. Chevrolet Performance essentially took the LS3 production engine, changed the oil pan, intake and camshaft and produced a reliable racing package.

Beginning with a proven aluminum block and high-flowing cylinder heads, Chevrolet stuffed the insides with hypereutectic pistons, nodular iron crank and a hydraulic roller, high-lift camshaft. This combination is good for an impressive 525 horsepower in a reliable and race-proven package. Chevrolet redesigned the cylinder heads to now feature a power-building, high-flow LS3 rectangular port design which creates loads of torque across the entire rpm while also supplementing the engine with the ability to rev high to 6,700 rpm.

The CT525 uses a conventional four-barrel carburetor, individual runner intake manifold and retains the factory coil-near-plug ignition design.

Also included is a 6-quart circle track oil pan that is designed to clear most GM rear-steer chassis with stock engine location. Although, this requires external an oil filter and cooler which increases oil capacity to approximately 8 quarts.

According to the Chevrolet Performance catalog, “The CT525 6.2L comes with coil-on-plug ignition, a water pump, exhaust manifolds and an SFI-certified balancer. It also comes with a 14-inch/168-tooth automatic transmission flexplate.” Essentially all that needed to start the engine is a starter and LSX ignition controller (PN# 19171130). Of course, it’s all available through ChevroletPerformance.com

With power finally meeting affordability in one solid engine package, what are you waiting for? The CT525 can be shipped to your door and ready for racing in practically no time at all. Make sure to check out ChevroletPerformance.com for more information regarding this CT525.

 

About the author

Sean Haggai

The former Associate Editor of Chevy High Performance, joins publication Chevy Hardcore, Sean is a true blue Bow Tie guy and a core do-it-yourself technician. If it doesn't run a "mouse motor" or a big rat between fenders, Sean ain't interested.
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