Rotary Performance Adjustment Request
#33565 from Jim Downing · Not recommended · Minutes (2023-01 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The Mazda 13B has not regularly competed
in recent U.S. Majors Tour events, and the Club Racing Board does not have current on-track data for the platform. The on-track
data collected at the VIR Super Tour event in 2019 showed a Mazda 13B using the current restrictor size to be fully in line with
its competitors for the factors that enter into a Balance of Performance powertrain assessment. Please see the response to
letter #27736 in the December 2019 Fastrack Minutes. If a member who is interested in racing the 13B enters and competes in a
U.S. Majors Tour event in 2023, the Club Racing Board will arrange to obtain on-track data to assess the platform’s current
performance potential relative to other cars in the class and will make data-based adjustments if warranted.