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;Table LA1 Recommended Maximum Engine Capacity
MASS OF VEHICLE
Maximum Engine Capacity (refer to notes below)
------------------------------------------------------------------------------------------Naturally Aspirated-----------------------------------------Turbo/Supercharged------
All vehicles originally weighing less than 800 kg.-----------------Original mass (kg) x 3.0 = max. capacity in cc’s---Original mass (kg) x 2.5 = max. capacity in cc’s.
All vehicles originally weighing between 800 kg and 1100 kg---Original mass (kg) x 4.0 = max. capacity in cc’s---Original mass (kg) x 2.75 = max. capacity in cc’s.
All vehicles originally weighing more than 1100 kg.--------------Original mass (kg) x 5.0 = max. capacity in cc’s---Original mass (kg) x 3.0 = max. capacity in cc’s.
2.13 ENGINE CAPACITY
For certification purposes under Codes LA1, LA2, LA3 and LA4, the recommended maximum capacity (swept volume) of engines for passenger cars and passenger car derivatives is outlined in Table LA1 below. An engine may not be a suitable replacement even if its capacity falls within the limits specified in Table LA1. Owners are therefore advised to check details of a proposed engine conversion with an engineering signatory prior to commencing any work.
Table LA2 provides examples as to how the maximum engine capacity is determined.
The maximum engine capacity for rotary engines is calculated by multiplying the swept volume of all rotors by two (e.g. a 13B rotary engine has a swept volume of 1308 cc resulting in a calculated maximum capacity of 2616 cc). Table LA3 provides examples of how the engine capacity of rotary engines is determined.
Table LA1 does not apply to commercial (ADR Category NA and NB1) or four wheel drive off-road (ADR category MC) type vehicles such as commercial vans, light trucks, small buses, etc. for which there are no set recommended limits.