MADELINE STEWART Partners with Zach Vanier in Porsche GT3 Engineering Duo

December 30, 2025

• New Zealand driver MADELINE STEWART formed a strategic partnership with Canadian racer Zach Vanier at JDX Racing in the Porsche Carrera Cup GT3 series. The duo worked with veteran engineer Greg Jones using a split-testing approach where each driver explored different car setups to maximize learning and performance gains for the team.
• The collaborative engineering approach proved effective, with STEWART and Vanier systematically testing different configurations before combining their findings. This methodical strategy allowed both drivers to contribute valuable data and feedback while advancing their technical understanding of GT3 car dynamics and setup optimization.
• While Vanier earned recognition for the Porsche Junior Shootout program, the success came through the team’s commitment to shared development. STEWART’s contributions to the split-testing program helped establish a foundation that positioned JDX Racing competitively within the demanding Porsche GT3 landscape throughout the season.

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