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 Post subject: QLD engine swap laws?
PostPosted: Tue May 26, 2020 7:07 pm 
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1275cc
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It's been a while and I have a feeling things may have changed a few years back but what ate the rules that dictate what engine can go into what car?
I thought it was something like 2.5 times the kerb weight = cc for a n/a and 2 times kerb = forced induction....

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PostPosted: Tue May 26, 2020 8:51 pm 
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Kerb Weight = Engine Capacity?

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PostPosted: Wed May 27, 2020 11:05 am 
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It's supposed to be nationalised at this point, of this is the case the table I was given by the engineer I've use here in NSW states:

For a vehicle with original weight less than 800kg naturally aspirated it's 3 x original mass in kg = maximum capacity in cc's.

For a vehicle with original weight less than 800kg turbo or supercharged it's 2.5 x original mass in kg = maximum capacity in cc's.

Different multipliers apply for 800 to 1100kgs and over 1100kgs.

Interestingly there are no limits on commercial vans or light trucks, so if you can convince your engineer you mini van or mini Ute is or was a commercial then you could put a k24 in it...

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PostPosted: Wed May 27, 2020 11:33 am 
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1275cc
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fuzzy-hair-man wrote:
Interestingly there are no limits on commercial vans or light trucks, so if you can convince your engineer you mini van or mini Ute is or was a commercial then you could put a k24 in it...

The Mini Van was indeed classed as a commercial vehicle. I can provide some factory documentation to support it if needed. The presence of a separate plate under the ID plate on commercial vehicles is a good starter.

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PostPosted: Wed May 27, 2020 9:21 pm 
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1098cc
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Nice! I wonder who will be the first to test it out. I know datsun 1200 utes have been able to get some pretty large engines as a result of being classified as commercial so there's a precedent.

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PostPosted: Thu May 28, 2020 2:33 am 
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Ah, VSB14... Fortunately in SA it's mostly treated as guidelines/advice (like it is) not rules.

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PostPosted: Thu May 28, 2020 8:29 pm 
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Found it :D ;
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.

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