KARTFIN1 10 cm wide.JPG

Cadet/Junior Restricted Classes
Review Project

Update #4      6-5-13

Further to Update #3 published on 6-3-13 we can now provide a further details on progress to date and the next steps.

Phase One Track Testing Complete
Progress continues well with two weeks of track usability testing having just been completed, post the dyno run-ins.  The weather was aIame on Cadet side web.jpg bit variable for the three days of Cadet spec testing (approximately 375 laps), however all four days of the JR spec testing (approximately 600 laps) were completed on a dry track. A dedicated team of drivers, guardians and working group team members ran a very professional operation over the two week program. Many thanks to KartSport Tokoroa for making its track available for the testing and to the two test teams.

This phase was to:

Evaluate the engines, their installations on both chassis sizes, the different options including carburettors, rpm limiters, exhaust headers or otherwise provided by manufacturers, MAW, etc.

Review overall usability and tunability.Raket on Cadet side web.jpg

Obtain and evaluate driver (2 x Cadet and 2 x JR) feedback on the driving experience in each configuration.

Compare like with like for parity on track.

Collect data for further analysis.

There were no high level on track comparisons between brands made at this stage as that will be completed in a later stage when parity comparisons with existing engines are also made.

The track testing data is currently being evaluated and will be added to a progress report which will be presented to the KartSport New Zealand Executive on 18th May.

Further track testing, dyno testing and engine wear measurements will follow.JR Vortex engine front web copy.jpg

Valid candidate engines have now been reduced to three: Iame, Vortex and Raket. (The PRD was eliminated following initial dyno running due to technical issues.)

Summary Notes:
Each manufacturer has provided two identical test engines together with components to change the configuration of the engines from Cadet to Junior Restricted configuration (and vice versa). These components consist of various combinations of exhaust header and/or carburettor, changes which would take any competent mechanic no more than 15 minutes to change back and forth.

The engines have been checked and measured against the supplied specifications, run in and baseline tuning information gained through dyno testing.  At this stage the potential candidates were reduced to three.

Following this all remaining engines have been tested on track in both configurations. The track testing is designed to determine usability, drivability, ease of tuning, parity, etc rather than directly comparing the performance of one engine brand versus the others.

Supplier-Distributor Arrangements
Kartsport New Zealand is currently dealing direct with the respective engine manufacturers to hasten and enhance the evaluation process and ensure manufacturer support. For engine brands with a current local agent/distributor the local agent/distributor has been party to communication from and to their respective engine manufacturer. Ultimate on-going distribution of the engine brand selected and contracted will however be handled by one (or more) distributor(s) in New Zealand who will be responsible for supply, customer care, spare parts and warranty issues. (IE: A similar process and contracting arrangement to that used for our restricted tyre contracts.)

Key Target Dates are:
Recommendations to the Executive                                                     by 31-7-13

Proposal(s) including timetables recommended to Clubs,
at 2013 National Conference, for adoption                                           24-8-13

Further announcements regarding this Review will be made as the project progresses. 

For further information please contact:

Graeme Moore
Project Leader







KartSport New Zealand