Chevrolet Performance CT525 Circle Track Crate Engines

Chevrolet Performance's deep-breathing, high-revving CT525 6.2L Circle Track crate engine is upgraded with forged pistons designed to support its performance and enhance its durability. The CT525 is based on the LS engine family and is similar to the 6.2L LS3—but adapted to Circle Track racing with a carbureted intake manifold, 6-quart racing oil pan and more. This engine is lightweight and strong, using an aluminum block with cross-bolted 6-bolt main caps and high-flow LS3 rectangular-port cylinder heads. That combination is rated 533 hp at 6,600 rpm and a hefty 477 lbs.-ft. of torque at 5,200 rpm, per Chevrolet Performance testing. The CT525 6.2L comes with coil-on-plug ignition and an SFI-certified balancer. All that's needed to complete the assembly is a carburetor, starter and LS/LSX ignition controller (P/N 19355863)—all available from Chevrolet Performance.

Tech specs:

* Engine Type: LS-Series Gen IV small block V8
* Displacement (cu. in.): 376 (6.2L)
* Bore x Stroke (in.): 4.000 x 3.62 (103.25 x 92mm)
* Block: Cast aluminum with 6-bolt, cross-bolted main caps
* Crankshaft: Nodular iron
* Connecting rods: Powdered metal
* Pistons: Forged aluminum
* Camshaft type: Hydraulic roller
* Valve Lift (in.): .525 intake / .525 exhaust
* Camshaft duration (at .050 in): 226 degrees intake / 236 degrees exhaust
* Cylinder heads: LS3 rectangular port; aluminum as-cast with 68cc chambers
* Valve size (in.): 2.165 intake / 1.590 exhaust
* Compression ratio: 10.7:1 nominal
* Rocker arms, intake: Investment-cast, roller trunnion
* Rocker arms, exhaust: Investment-cast, roller trunnion
* Rocker arm ratio: 1.7:1
* Recommended fuel: Premium pump
* Maximum recommended RPM: 6,700
* Reluctor wheel: 58x
* Balanced: Internal

* INSTALLATION NOTES:
-- Requires addition of carburetor, starter, fuel system, exhaust system and front accessory drive system
-- The 6-quart Circle Track oil pan is designed to clear most GM rear-steer chassis with stock engine location
-- The engine is designed for Circle Track racing only. It is not intended for street use
-- The CT525 does not include a water pump or factory exhaust manifolds
-- Chevrolet Performance Circle Track racing engines include anti-tampering seals installed

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