FAQs

Track testing will be required for any of the following: oversize wheels and tyres; increases in wheel track or wheelbase; upgraded suspension packages not covered by a CRN number; modifications including fitment of non-ADR-standard approved accessories; and modifications to braking systems including an upgraded dual-diaphragm brake booster, larger rotors, larger calipers or disc brake conversions.

For additional information, contact your local VSCCS certifier.

The best way forward is to undertake an initial engineering compliance inspection of the vehicle before any major modifications are undertaken. This includes discussing the client’s requirements and inspecting the vehicle to determine the proposed upgrades and any existing modifications that may require corrective measures.

Depending on the scope of the modification, the process could include maximum front and rear axle-weight loading; low- and high-speed braking; lane-change, emissions and noise testing; ultrasonic testing of welded components; and test reports or CRN numbers for modified components.

An initial compliance report may identify corrective measures and statutory registration requirements. A weighbridge certificate for the completed modified vehicle, including front and rear axle weights, may also be required. The process then includes a final engineering inspection, issue of the compliance certificate and the Transport for NSW process.

There are a number of reasons. Larger wheels and tyres are heavier and have a greater rolling diameter, which affects the safe handling of the vehicle. Larger wheels may require larger brakes, and vehicle stability can be compromised because the centre of gravity is changed from the manufacturer’s design height.

The height change can affect road handling, front-zone crash protection, bumper heights relative to other vehicles, side-protrusion protection, airbag crash sensors, electronic stability control and, in some cases, wheel track. Statutory limitations and the requirements of VSB 14, applicable ADRs, the Brake Assessment Manual and the Suspension Manual may apply.

Yes. There are many factors to be covered by a bus modification, including axle-weight distribution, the bus rules applicable to the modifications and service operations, seat anchorages, seat spacing, whether seatbelts are applicable, aisle width, emergency-exit compliance and technical specifications.

Vehicle insurance cover could also be void if modifications are not certified.

The replacement engine installed into a modified vehicle will have capacity, size and weight limits. Axle-weight limits cannot be exceeded.

As one example, NCOP3, Section LA Version 2.0 (January 2011) states that a vehicle weighing 800 to 1,100 kg can have a maximum engine capacity of four times the original vehicle mass. For example, 1,100 kg × 4 = 4,400 cc. Axle limits, braking ability, emissions and exhaust-noise limits still apply.

If the vehicle has a chassis, as most 4WDs do, engine-size limits may not apply. However, axle capacities and all other requirements still apply. Front-axle loading with the driver and passengers can be exceeded in many engine conversions.

Vehicle emissions must comply with the requirements applying to the model being modified. An earlier-model engine cannot be installed in a later-model vehicle unless emissions requirements are compatible. Sports camshafts or an aftermarket ECU may prevent the emissions requirements from being met.

The exhaust must be noise tested and certified to the vehicle’s model year. Brakes must be tested to the Brake Assessment Manual. The engine and transmission installation must also be thoroughly inspected for good engineering practice and compliance with VSB 14 or another applicable standard.

It depends on the modifications intended or already carried out, travelling expenses and whether testing is involved.

No. The trailer needs to be assessed before it is modified so the proposed changes can be checked for suitability. A scope of work can then be prepared, including how the work must be completed to meet the requirements of VSB 6.

Yes. LCA certifiers write VSCCS certificates for the classes of vehicles covered by their licences.

This is a complex question because the process depends on the vehicle and its modifications. The certifier tests the items that have been changed or modified, then confirms whether the vehicle complies with the relevant ADRs applicable to that model. A VSCCS engineering certificate can only be issued after the required inspections and testing are completed satisfactorily.

This is a complex question because many different modifications can be made to a vehicle. Generally, a greater number of modifications involves a greater cost. Vehicle testing may be required, and brake or swerve testing can be expensive because it can involve closed-track hire, several people and filming of the tests.

Pricing is therefore by application. Provide the vehicle type and details of the changes to a VSCCS certifier so they can assess the work and provide an appropriate quotation.