604 CRATE
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High-Revving Performance. Proven Durability
The Chevrolet Performance CT400, often referred to as the crate 604, is built to live at high RPM. Fast burn aluminum cylinder heads with LS-style beehive valve springs improve airflow and valvetrain stability, allowing the engine to rev harder and pull more power from every cubic inch. The result is a race-ready small-block delivering 404 horsepower at 5,600 RPM and 406 lb-ft of torque at 4,600 RPM, engineered for reliability under sustained competition use.
| PART NUMBER | 88869604 (old 19318604) | |
| ENGINE TYPE | Chevy Small Block V8 | |
| DISPLACEMENT (cu in) | 350 | |
| BORE X STROKE | 4.000 x 3.480 | |
| BLOCK (PN 10243870) | Cast Iron with 4 bolt main caps | |
| CRANKSHAFT (PN 12670965) | Forged steel shot peened | |
|
CONNECTING RODS (PN 10108688) |
|
Powdered metal |
| PISTONS (PN 10159436) | Hypereutectic aluminum | |
| INTAKE MANIFOLD (PN 12496822) | Single plain aluminum | |
| CAMSHAFT TYPE ( PN10185071) | Steel hydraulic roller | |
| VALVE LIFT | .474 intake/ .510 exhaust | |
| CAMSHAFT DURATION | 208 intake/ 221 exhaust | |
| CYLINDER HEADS (PN 19417592) | Fast Burn aluminum, 62cc chambers | |
|
VALVE SIZE |
2.000 intake/ 1.500 exhaust | |
| COMPRESSION RATIO | 9.72:1 Nominal | |
| ROCKER ARMS (PN19432297) | Aluminum, roller style | |
| ROCKER ARM RATIO | 1.5:1 | |
| RECOMMMENDED FUEL | Premium pump | |
| IGNITION TIMING | 36 total @ 4,000 rpm | |
| MAX RECOMMENDED RPM | 5,800 | |
| BALANCED | External |
INSTALLATION NOTES
-Requires addition of carburetor, starter, ignition, plug wires, water pump, distributor and exhaust system (not included)
-Requires an externally balanced flywheel (not included)
-The 8 quart circle track oil pan is 7 inches deep at the sump. It will clear most GM rear-steer chassis with stock engine location
-For circle track racing only- not intended for street use
-Circle track racing engines from Chevrolet Performance include anti-tampering seals installed
NOTE: Distributor with melonized steel gear MUST be used with long-blocks and partial engines with steel camshafts, or engine damage will occur
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