Chevrolet Performance Circle Track Crate Engines: Drop One in and Go Racing

A lot of tracks and race classes require a spec crate engine. Or maybe you’d just rather unbox your horsepower and drop it in your race car. Whichever path you take, Summit Racing has you covered with Chevrolet Performance Circle Track Crate Engines. These engines are built with all-new parts and factory-sealed to meet the rules in classes requiring such engines.

CT350 Crate Engine
Based on Chevrolet Performance’s HO street crate engine, the 9.1:1 compression, 350 cubic inch small block makes 350 horsepower at 5,000 rpm and 390 lbs.-ft. of torque at 3,800 rpm. The CT350 delivers 300 lbs.-ft. of torque between 2,000 and 5,000 rpm, which lets you stay in a lower gear to improve lap times.
Features include:
• Four-bolt main block with one-piece rear main seal
• Nodular iron cast crankshaft, hypereutectic cast pistons, and powdered metal connecting rods
• Hydraulic flat tappet camshaft (.435 inch intake/.460 inch exhaust lift,  212° intake/222° exhaust duration at .050 inch)
• Vortec cast iron cylinder heads with 64cc chambers, 170cc intake runners, 1.94 inch intake/1.50 inch exhaust valves
• Eight quart deep sump oil pan with kickout—will clear most GM rear-steer chassis
• High rise dual plane aluminum intake manifold
• HEI distributor and harmonic damper
• Stamped steel valve covers with racing style breathers

CT355 Crate Engine
This engine is based on the famous ZZ4 crate engine. That means it gets a stronger bottom end with a forged crank and high-silicon pistons, a roller camshaft, and ZZ4 aluminum cylinder heads. Those parts mean the 10.1:1 compression CT355 makes, 355 horsepower at 5,250 rpm, and 405 lbs.-ft. of torque at 3,500 rpm.
Other features include:
• Four-bolt main block with one-piece rear main seal
• Hydraulic roller camshaft (.474 inch intake/.510 inch exhaust lift, 208° intake/221° duration at .050 inch)
• Aluminum cylinder heads with 58cc chambers, 170cc intake runners, 1.94 inch intake/1.50 inch exhaust valves
• Eight quart deep sump oil pan with kickout—will clear most GM rear-steer chassis
• High rise dual plane aluminum intake manifold
• HEI distributor, mechanical water pump, and harmonic damper
• Stamped steel valve covers with racing style breathers

CT400 Crate Engine
The CT400 uses the same short block as the CT355, but swaps the ZZ4 heads for a set of ‘Fast Burn” aluminum heads with LS-style beehive valve springs that allow the engine to rev more quickly. The 9.7:1 compression CT400 makes 400 horsepower at 5,500 rpm and 400 lbs.-ft. of torque at 4,500 rpm. Other features include:
• Aluminum cylinder heads with 62cc chambers, 210cc intake runners, 2.00 inch intake/1.55 inch exhaust valves
• Aluminum roller rocker arms
• Single plane aluminum intake manifold
• Eight quart deep sump oil pan with kickout—will clear most GM rear-steer chassis
• HEI distributor
• Harmonic damper
• Stamped steel valve covers with racing style breathers

CT525 Crate Engine
This LS-based engine is designed for Super Late Model and Modified classes. The 6.2L engine makes 525 horsepower at 6,700 rpm and 471 lbs.-ft. of torque at 5,000 rpm. Features include:
• Cast aluminum cross-bolted block
• Nodular iron crankshaft, hypereutectic pistons, powdered metal connecting rods
• Hydraulic roller camshaft (.525 inch intake/exhaust lift, 226° intake/236° duration at .050 inch)
• LS3 rectangular port aluminum cylinder heads
• Single plane carbureted intake manifold
• Six-quart oil pan, external oil filter and cooler required
• Coil-on-plug ignition
• Exhaust manifolds, water pump, and harmonic damper
• 14 inch/168-tooth flexplate

The CT350 and CT355 are externally balanced, while the CT400 and CT525 are  internally balanced. The CT525 requires a Chevrolet Performance LSX controller, part number NAL-19171130.

SEE CHEVROLET PERFORMANCE CIRCLE TRACK CRATE ENGINES AT SUMMIT RACING