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  • Over the past seven months the Super Sedan Class Technical Advisory Committee (CTAC) have investigated the potential implementation of the Chevrolet CT525 engine as an alternate option into the class of Super Sedans.

    Both the fuel injected and the carburettor version of the Chevrolet CT525 were investigated at length in order to introduce an alternate engine that is more affordable and is readily available to all competitors in the premier class of sedan racing,

    It is expected that the CT525 will prove to be a very competitive and durable engine and one that is much less expensive than current Super Sedan engines.

    Technical information, specifications and details of discussions with engine suppliers and importers were collected during the CTAC investigation. This information and the majority support of the Super Sedan competitor group made it very easy for the Speedway Sedans Australia Board to endorse the decision to implement the CT525 as an alternate engine.

    The introduction of the CT525 as an alternative engine for Super Sedans will be effective immediately.

    CT525 Engine Specifications

    GM Part Number: 19331563
    Engine Type: LS-Series Gen IV Small Block V8
    Displacement (cu in): 376 (6.2L)
    Bore x Stroke (in): 4.065 x 3.62 (103.25 x 92mm)
    Block (P/N 12623967): Cast-aluminum with 6-bolt, cross-bolted main caps
    Crankshaft (P/N 12597569): Nodular Iron
    Connecting Rods (P/N 12649190): Powdered metal
    Pistons (P/N 19207287): Hypereutectic aluminum
    Camshaft Type (P/N 88958770): Hydraulic roller
    Valve Lift (in): .525 intake / .525 exhaust
    Camshaft Duration (@.050 in): 226 degree intake / 236 degree exhaust
    Cylinder Heads (P/N 12629063): 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 (P/N 12669995 int): Investment-cast, roller trunnion
    Rocker Arms (P/N 12669993 exh): Investment-cast, roller trunnion
    Rocker Arm Ratio: 1.7:1
    Fuel: petrol or alcohol as per SSA specifications
    Reluctor Wheel: 58x
    Maximum GM Recommended rpm: 6,700
    Maximum absolute rpm: 7,000
    Balanced: Internal
    LSX ignition controller P/N 19171130
    Must remain Wet Sump only

    No engine components detailed above shall be modified or exchanged.

    The engine shall be sealed as per existing SSA sealing procedures.

    In addition to the above specifications the following carburetor, starter, fuel system, exhaust system and front drive systems shall comply with the existing Super Sedan specifications.

    Photo courtesy of Angryman Photography

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