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
