Author Topic: WCMA Technical Bulletin - 20180316 ST4 – ST5 Classing  (Read 590 times)

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March 19, 2018, 12:00:32 PM
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Spec Volcanic

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WCMA Technical Bulletin - 20180316
ST4 – ST5 Classing

To ease of transition from PTC (and PTD in 2019) to ST4 and ST5; the WCMA will accept all 2016 & 2017 PTC and PTD classification forms as forms for ST4 and ST5 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.  All PTD competitors are encouraged to compete in ST5 in 2018.

•   Cars running ST4 or 5 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 2018 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 compete 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 is reducing classes by combining ST4, PTC and PTD into ST4 and ST5 over 2 seasons

Review:
•   ALL 2017 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 comparable vehicle

Findings:
•   ALL 2017 ST4 and PTC competitors would be eligible to compete in ST4 in 2018, 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 PTD competitors would be eligible to compete in ST5 in 2018. NASA has specifically designed ST5 to include all PTD competitors
 
Class    Entry   Entry #    Car   LB   AVG HP   ST ADJ WT/HP   NOTE
ST4   Team BSD 88   88   TSX   2945   275   12.4   From Last year’s form
ST4   Justin L   144   944   2795   243   12   From Last year’s form - est high max hp
ST4   Dominic K   12   CIVIC   2200   185   13.3   ST5 not possible with ballast alone
ST4   Dave G   70   CIVIC   2305   176   14.5   ST5 @ 2525LB
ST4   Martin R   142   RX-7   2505   184   14.4   ST5 @ 2675LB
ST4   Ryan S   49   RX-8   2725   188   15.4   NO DYNO - GUESS AT HP LIKELY HIGH ST5 @ 2750LB
ST4   Stu G   77   INTERGRA   2500   183   15.1   NO DYNO EST OFF FORM ST5 @ 2600
ST5   Stu G   77   CIVIC   2600   194   14.4   
PTD/ST5   Gary R   37   SENTRA   2450   164   15   
PTD/ST5   Aaron Ben E   25   RX-8               
PTD/ST5   Team BSD 65   65   TSX               
PTD/ST5   Team BSD 20   20   INTERGRA               
PTD/ST5   Cyrus P   934   TIBURON               
PTD/ST5   Basil K   191   300ZX               
PTD/ST5   Scott L   65   INTERGRA               



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