Author Topic: WCMA Technical Bulletin - 20190402 - Classing ST4-6  (Read 129 times)

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April 02, 2019, 08:28:15 AM
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Spec Volcanic

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WCMA Technical Bulletin - 20190402
ST4 ST6 Classing

To ease of transition from PTC-PTE to ST4-ST6; the WCMA will accept all 2017-2018 PTC, PTD, & PTE classification forms as forms for ST4, ST5 and ST6 for the 2018 and 2019 season as follows:

   PTC classification forms will be accepted as a form for ST4 if the vehicle is unchanged since the form was originally completed.

   PTD classification forms will be accepted as a form for ST5 if the vehicle is unchanged since the form was originally completed. 

   PTE classification forms will be accepted as a form for ST6 if the vehicle is unchanged since the form was originally completed. 

   Cars running ST4-6 on a PT classification forms are able to/required to run tire in accordance with ST4 or 5

Notes:
   Vehicles that have been modified since the last PT classification form was completed must submit a 2019 ST classification form.

   Many PTC competitors could be eligible for ST5 with minor modifications, such as the addition of ballast. PTC competitors wishing to compete is ST5 must complete a ST classification form.

   Many PTD competitors could be eligible for ST6 with minor modifications, such as the addition of ballast. PTC competitors wishing to compete is ST5 must complete a ST classification form.

   Additional information regarding the background, review and finding are on the following page.
Gary Roberts
Race Director
Western Canadian Motorsports Association

cc: Andy de Boon, President WCMA; Gary Lohues Supervisor-Scrutineers WCMA, Susan Wilson, Administrator WCMA; NASCC; WSCC; PTC and PTD competitors




Background:
   NASA has reduced classes by combining ST4, PTC, PTD, and PTD into ST4, ST5 and ST6

Review:
   In 2017 all ST4, PTC and PTD competitors with completed forms were reviewed and where the form had enough info that competitor was reclassed to ST4 or ST5
   For PTC competitor without enough info (IE no Dyno sheet) best estimated dyno curves from a comparable vehicle

Findings:
   ALL 2017 ST4 and PTC competitors would be eligible to compete in ST4 with their vehicle as it competed in 2017
   Some (but not all) PTC competitors should be eligible to compete in ST5 with the addition of 25-220lb ballast. 
   ALL 2017-2018 PTD competitors should be eligible to compete in ST5 in 2019. NASA has specifically designed ST5 to include all PTD competitors
   Some (but not all) PTD competitors should be eligible to compete in ST6
   ALL 2018 PTE competitors should be eligible to compete in ST6 in 2019. NASA has specifically designed ST6 to include all PTE competitors


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