Knoxville Raceway Announces Rule Changes for all Three Divisions
Wednesday, March 08, 2017
Knoxville Raceway Officials have released the 2017 rule changes for all three sprint car divisions. Major changes involve wheel cover fasteners, mandatory head and neck restraints, 360 top wing wicker bill changes, and updated carbon fiber parts.
Major changes and or additions to the rules are as follows:
7.11-WHEELS AND WHEEL COVERS: Maximum right rear width is 18 inches and maximum left rear width is 15 inches. Must be steel or aluminum only. Wheel covers: it is highly recommended that wheel covers have a minimum of 5 mounting points. However, both 5 and 3 mounting point wheel covers will be allowed for competition under the following conditions: Beginning with the 2017 racing season wheel covers having a minimum of 5 attachment points may continue to use dzus fasteners. Said dzus fasteners must be made of steel only. Wheel covers having only 3 attachment points must be bolted-on at all 3 points utilizing a minimum 5/16”, flanged steel bolt and an approved fastening (nut assembly) system. Approved fastening (nut assembly) systems: Approved fastening (nut assembly) systems: Keyser Manufacturing, part #100 7-101. Wehrs Manufacturing Part # (WM377A-312 Aluminum 5/16) (WM377S-312 Steel 5/16) Triple X Chassis Part # SC-WH-7810(for a 1” spring) / SC-WH-7820(for a 1 3/8” spring) Smith Precision Products Part # MC-516-18
Optional fastening systems that are equal or superior to the above approved system will be approved at the sole discretion of Knoxville Raceway Officials.
7.21- CARBON FIBER: Excluding brake rotors, torque tubes, no carbon fiber parts in suspension, steering components, or drive line, including radius rods, no carbon fiber engine sleeves, carbon fiber manifolds and/or any other injection type pieces manufactured from carbon fiber (410 class). Carbon fiber injection stacks are allowed. See 7.28 Seats for approved carbon fiber seats.
7.26-DRIVER’S EQUIPMENT :
Knoxville Raceway reserves the right to inspect any helmet for cracks or structural damage and reject same if necessary. *All drivers will be required to wear a full-face helmet with a minimum safety rating of FIA 8860-2004, FIA 8860-2010, Snell SA 2005, Snell SA 2010, Snell SAH 2010 and/or a valid SFI 31.1/2005/2010 label.*(FIA and Snell dates may be updated in these rules at a later date). It is strongly recommended that helmets should have the Eject ™ helmet removal system installed as per the manufacturer’s instructions. At all times during an event, including practice, qualifying and competition (excluding starting the car for engine warm-up) drivers should wear an SFI-approved head and neck restraint device/system that is properly mounted and connected per the manufacturer’s instructions. The device should meet SFI 38.1 specifications and display a valid SFI 38.1 label. This requirement will become mandatory June 9th, 2017 in the 410 class. Head and neck restraint devices shall become mandatory for 305 and 360 classes August 1, 2017.The head and neck restraint must be SFI 38.1 approved and display a legible and valid SFI 38.1 label.
D. Maximum 2” removable wicker bill may be mounted on the rear edge of the center foil. Flat wings only, Wicker bill must be 90 degrees to the top of the Center Foil.
These rule changes have been researched and adopted by the World of Outlaws Craftsman Sprint Car Series. Knoxville Raceway and other tracks and organizations across the country are adopting these same rules.