Revise Appendix F regarding Flat Plate Intake Restrictor.
#33032 from Jim Graffy · Rule change · TB 22-10 (2022-10 Fastrack)
In GCR, Appendix F Restrictor, Intake, change as follows:
"Flat Plate Intake Restrictor (FPIR) – a metal plate through which all engine combustion chamber air (and possibly fuel) mustpass. with a hole through which all air to the engine must pass shall be round, centered with respect to the throttle body bore or
carburetor bore or intake manifold bore to which it is attached; no radiusing, chamfering or beveling of the hole is
permitted. Unless otherwise specified in a category, class or individual engine specification, all flat plate restrictors must meet
the following requirements (more than one plate restrictor may be required in some applications; each shall meet the
requirements):"