2.3L sealed engine
#30057 from Chris Vian · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The requirements for 2.3L engines have not
been changed for 2021. The rules have required all 2.3L engines to use a single inlet restrictor (SIR) since the sealed 2.3L engine
was eliminated at the end of 2017. Please see the responses to letter #22614 in the October 2017 Fastrack Technical Bulletin,
letter #23875 in the March 2018 Fastrack Technical Bulletin, and letter #28018 in the February 2019 Fastrack Minutes. Members
may continue to run 2.3L engines in compliance with Spec Line G of the engine table.