NMRA Technical Department Announces Parity Adjustment
Based on NMRA Limited Street performance data from the 19th annual NMRA Ford Motorsports Nationals on June 27-30, 2019, the NMRA Technical Department made the following adjustments effective immediately for these Limited Street combinations:
TVS Gen3R supercharger approved upper pulley size changed from 3.228 to 3.400. This changed the 2.317:1 lower/upper pulley ratio to the now approved 2.200 lower/upper pulley ratio.
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