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
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