Chevrolet Performance CT525 6.2L Crate Engine / High-RPM LS Performance with Forged Pistons – Part Number: 19434598 – Colorado Springs, Colorado

Chevrolet Performance’s deep-breathing, high-revving CT525 6.2L crate engine is assembled with strong forged pistons and a high-lift roller camshaft designed to support its performance capability and enhance its durability.

The CT525 is based on the LS engine family and is similar to the 6.2L LS3. Still, Chevy adapted it to circle track racing with a carbureted intake manifold, 6-quart racing oil pan, heavy-duty engine bearings, and more. It’s a combination rated at 533 horsepower at 6,600 rpm and a substantial 477 lb.-ft. of torque at 5,200 rpm, per Chevrolet Performance testing. The engine assembly comes with coil-near-plug ignition and an SFI-certified balancer. All that’s needed to complete the assembly is a carburetor, starter, and our LS/LSX ignition controller (P/N 19355863)—all available from Chevrolet Performance.

• Use LS/LSX ignition controller P/N 19355863 (not included). Required to operate CT525 Circle Track crate engine; Preset timing curve and rev limiter; Direct plug-in to factory LS sensors and coils; Includes complete ignition wiring harness

• 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
• Circle track crate engines have no warranty. They are intended for off-road racing activities only.

Part Number: 19434598

Engine Type: LS-Series Gen IV Small-Block V-8

Displacement (cu in): 376 (6.2L)

Bore x Stroke (in): 4.065 x 3.62 (103.25 x 92mm)

Block (P/N 12729604): Cast aluminum with 6-bolt, cross-bolted main caps

Crankshaft (P/N 12736809): Nodular iron
Connecting Rods (P/N 12649190): Powder metal with ARP bolts

Pistons (P/N 19418214): Forged aluminum

Camshaft Type (P/N 88958770): Hydraulic roller

Valve Lift (in): .525 intake / .525 exhaust

Camshaft Duration (@.050 in): 226° intake / 236° exhaust

Cylinder Heads (P/N 12675871): LS3 rectangular port; aluminum as-cast with 68cc chambers

Valve Size (in): 2.165 intake / 1.590 exhaust

Compression Ratio: 10.7:1

Rocker Arms (P/N 12696105 int): Investment-cast, roller trunnion

Rocker Arms (P/N 12681275 exh): Investment-cast, roller trunnion

Rocker Arm Ratio: 1.7:1

Recommended Fuel: Premium pump

Maximum Recommended rpm: 6,700

Reluctor Wheel: 58x

Balanced: Internal

REQUIRED READING: https://www.chevrolet.com/content/dam/chevrolet/na/us/english/index/performance/resources/02-pdfs/02-15-2023/CT525-Tech-Manual-FINAL-2-13-23.pdf

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Founded in 1911 in Detroit, Chevrolet is one of the world’s largest automotive brands. It operates in over 140 countries and sells more than 4.5 million cars and trucks annually. Chevrolet offers a comprehensive line of vehicles with spirited performance, expressive design, thoughtful technology, high quality, and value.

GM has a long history of providing the engine of choice for circle track racing. The introduction of the small-block Chevy in 1955 started it all. Production parts were durable, and the engines were plentiful. In the 1960s, Chevrolet began to produce HD parts for racing activities, and a whole industry was started. Over time, the competitive nature of racing drove costs increasingly higher, and sanctioning bodies found it increasingly difficult to police the competitors. In the 1990s, several tracks and individuals took Chevrolet’s successful crate engines designed for the street and adapted them for circle track applications. The potential for cost savings was tremendous. Based on the success of the three traditional Gen0/1 Small Block CT engines, GM Racing and Chevrolet Performance Parts engineers have developed a modern production engine into a circle track race motor. The base engine for the CT 525 comes from the highly successful latest generation of the LS engine family, the 6.2L LS3 Gen 4 V-8. This engine is then up-fitted with a Circle Track Racing Oil Pan, Open Plenum Carbureted 4 barrel Intake Manifold, ASA Camshaft, and a Ported Left side Valve Cover for breathers. Each engine is assembled with all new parts on a production line to keep costs down. The engines then are up-fitted with special oil pans, valve covers, and sealing bolts. Factory sealing of the engines is one of the keys to the program’s success. This makes it difficult to tamper with the engine and helps maintain equality among the competitors. If used as directed, the engines should provide several seasons of use with minimal maintenance.