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Demonstrate knowledge of competition race vehicle engine performance modification requirements and practices

Level / 5
Credits / 7

Purpose This theory-based unit standard is for people in the automotive industry. People credited with this unit standard are able to demonstrate knowledge of competition race vehicle engine performance modification requirements and practices.

Subfield / Motor Industry
Domain / Engines
Status / Registered
Status date / 25 June 2007
Date version published / 26 November 2007
Planned review date / 31 December 2012
Entry information / Recommended: Unit 11726, Demonstrate knowledge of engine design factors and machining practices, or demonstrate equivalent knowledge and skills.
Accreditation / Evaluation of documentation and visit by NZQA and industry.
Standard setting body (SSB) / NZ Motor Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference / 0014

This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.

Special notes

1 Legislation and publications relevant to this unit standard include but are not limited to – Hazardous Substances and New Organisms Act 1996, Health and Safety in Employment Act 1992, MotorSport New Zealand regulations, New Zealand MotorSport Manual No 33.

2 The MotorSport New Zealand regulations (motorsport regulations) and the New Zealand MotorSport Manual (motorsport manual) are available from the MotorSport New Zealand website http://www.motorsport.org.nz/. The Motorsport Manual is subject to frequent amendment, and any amendments will take precedence for assessment purposes, pending the review of this unit standard.

3 Definition

Company requirements refer to instructions to staff on policy and procedures which are documented in memo or manual format and are available in the workplace. These requirements include but are not limited to – company specifications and procedures, work instructions, manufacturer specifications, product quality specifications, and legislative requirements.

Service information may include but is not limited to – technical information of a vehicle, machine, or product detailing operation; installation and servicing procedures; manufacturer instructions and specifications; technical terms and descriptions; and detailed illustrations. This can be accessed in hard copy or electronic format and is normally sourced from the manufacturer.

Elements and performance criteria

Element 1

Demonstrate knowledge of competition race vehicle engine performance modification requirements.

Performance criteria

1.1 Motorsport conditions determining allowable engine modifications are explained in accordance with motorsport regulations.

Range includes but is not limited to – classification, event criteria, approved fuels, engine mounting, hoses, fluid leaks, cylinder capacity.

1.2 Factors that impose limitations on modifying and tuning existing production engines are analysed.

Range includes but is not limited to – engine design, structural rigidity, availability of components.

1.3 The effects on engine functions when dimensions are changed are explained in accordance with engine component service information.

Range includes but is not limited to – valve repositioning, camshaft profiling, cylinder compression ratios, piston design, connecting rod and crankshaft relationship, block height, bore offsetting, over-boring, flywheel modifications.

1.4 The importance of sufficient and properly timed airflow when modifying engines for increased power and efficiency is explained in accordance with engine component service information.

1.5 Engine capacity and compression ratio calculations are determined in relation to raising the compression ratio of an engine.

1.6 The relationship between engine torque and power is analysed in terms of determining how an engine performs.

1.7 Ways of increasing engine torque are explained in accordance with engine design principles.

Range includes but is not limited to – improving mechanical efficiency, increasing compression ratio, optimising fuelling and ignition timing.

1.8 The advantages of improving pulse timing to increase volumetric efficiency are explained in relationship to induction and exhaust system design.

1.9 Factors to take into account when measuring brake horsepower are determined in relationship to competition race vehicle engine design and development work.

Range includes but is not limited to – value of engine dynamometer results, engine ancillaries, chassis dynamometer frictional and coast-down losses, operating conditions.

1.10 The relationship between engine power and a competition race vehicle’s top speed is defined and calculated.

Range calculation includes rolling resistance and air resistance retarding forces.

Element 2

Demonstrate knowledge of competition race vehicle engine performance modification practices.

Performance criteria

2.1 Dismantling, cleaning, and inspection procedures in preparation for performance modifications are described in accordance with company requirements.

Range includes but is not limited to – planning the work, preparing work bay area, dismantling in logical sequence and labelling where necessary, evaluating what needs to be done, cleaning components and preparing for machining.

2.2 Procedure to gather information for machinist and/or engine builder on any identified problems found during dismantling is outlined in accordance with company requirements.

Range includes but is not limited to – making note of any visual defects found, recording damage or missing components, recording any measurements taken.

2.3 Custom machining operations on cylinder heads are explained in accordance with company requirements.

Range includes but is not limited to – porting and polishing, valve setting and machining, competition valve rework, intake manifold rework to optimise flow, camshaft re-profiling, combustion chamber modification, valve seat and guide machining.

2.4 Custom machining operations on cylinder blocks are explained in accordance with company requirements.

Range includes but is not limited to – block preparation, block resurfacing, calculating bore sizes and determining amount of metal to be removed, replacing pistons, line honing, replacing bearings, crankshaft balancing, dry sump conversion.

2.5 Lightening and balancing of engine components are explained in terms of their effect on component reliability and engine performance.

2.6 Engine durability testing procedures are described in accordance with company requirements.

Range includes but is not limited to – running-in, oil leaks, performance cycling tests, meeting target performance numbers, adjusting settings to maximise horsepower and torque.

Please note

Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.

Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact the NZ Motor Industry Training Organisation if you wish to suggest changes to the content of this unit standard.

Ó New Zealand Qualifications Authority 2007