Remove redundant inlet restrictor provisions
#25877 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)
In GCR section 9.1.8.C.J.2, make changes as follows:
“Where a carburetor or fuel injection restriction is specified, a flat plate restrictor,
venturi, or SIR or TIR is required through which all intake air for each cylinder or the entire fuel-
air mixture, if prepared before this point, shall pass.
SIR and TIR installations are per the Technical Glossary requirements. Where intake
restrictors (excluding SIR and TIR) are specified, the restrictors shall be round orifices (unless
otherwise specified) and located within four (4) inches of the throttle butterfly.”
Delete GCR section 9.1.8.C.J.10 in its entirety and re-number as appropriate:
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“On turbocharged and supercharged engines, only one turbocharger or supercharger unit shallbe used, and all air shall pass through a single inlet restrictor.”