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CT525 Crate Engine




There has been a fair bit of interest since the weekend about the CT525 crate engine.

Our media team referred to it as the little crate engine in tongue and cheek due to the smaller hp and smaller price tag when compared to some of the other engine dollars and hp figures being thrown around the pit paddock.

If a CT525 engine is used in a Super Sedan, the minimum weight limit is only 1000kg, 100kg lighter than using any other V8 engine.

But for those wanting to know more here are the CT525 Engine Specifications straight from our Super Sedan specification book dated November 2019 (current at the time of posting this information):

GM Part Number: 19331563
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 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 intake / 236 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, GM LS Circle (14/09/19)
Track Ignition Controller P/N 19355863 or MSD 60144CT (14/09/19)
Note: The ignition controller shall be fitted with a data inspection port. (14/09/19)
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 carburetor, starter, fuel system, exhaust system and front drive systems shall comply with the existing Super Sedan specifications as per the current specification found in the following link:

Super Sedan Specification:
http://www.speedwaysedans.com/images/Docs/Super%20Sedan%20Specification%20Manual%20Online%20-%20November%202019%20-%20v8.pdf

Australian Racing Rules & Regulations 2019





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