Chassis Support Bar Rules 2019

Chassis Support bars in 2019 all chassis will be required to have additional bars installed to support and decrease the span between the front and rear uprights in the driver’s area will be mandated by July 27th for 410 division and 2020 for the 358 division. The new support bars must be an addition to the front and rear uprights. Any attempts to manipulate the front and rear uprights to conform to these measurements will not be tolerated or allowed at the discretion of Williams Grove Speedway Officials. The left and right-side support bar do not have to be the same. These additional bars will be minimum 1.375 X .083 ASTM4130 normalized steel or equivalent material. Left and right-side support bars may be one of the three designs below. Left and right-side support bars do not have to be of the same design. Right side body opening shall remain the same 10 vertical inches and 21 horizontal inches.

 

Left and right-side support bars may be one of the three options:

 

  1. Support bar may be designed similar to what was known as a “safety bar”. It must be attached to the top rail at a point 15” to 20” from the rear of the front upright. It must attach to the hip rail and have a gusset attached to the rear upright near a point opposite of the rear brace/shock mount bar. The curve must be between 4” and 7” measured from outside of the rear upright tube to the outside of the support bar. See Diagram #16.12.1

 

  1. Existing chassis with a left side support bar installed (formerly called safety bar) that do not meet the option one specification above, may add a gusset that attaches to the top rail 15” to 20” from the rear of the front upright and angle to the support bar. The existing support bar tubing must meet the minimum as described above (1.375 X .083 ASTM4130 normalized steel or equivalent material). See Diagram #16.12.2

 

  1. A support bar may be added to the top rail at a point 15” to 20” from the rear of the front upright and to the rear upright near a point of the rear brace / shock mount bar but no higher than 7” above the hip rail. This bar may have a slight curve near the rear upright to accommodate elbow room and ease of fitment. See diagram #16.12.3