Originally Posted by koolaid89:
Can someone explain the differences between a Silvercrown and Sprint car, or good refrences to do my own research. Thanks.
See:
http://www.usacracing.com/assets/fil...ACRULEBOOK.pdf
Silver Crown:
203 Dimensions and Weight
A. The wheelbase must be at least 96 inches. (See Illustration #3)
B. The overall length will be limited to a maximum of 15 feet.
C. The tread must be at least 47 inches.
D. The overall width will be limited to a maximum of 80 inches. (See Illustration #3)
E. The maximum offset allowed, for both front and rear wheels, is 4-1/2 inches (9 inches overall) measured from the
centerline of the chassis to the inner wheel bead seat.
The outside bead seat of the right rear wheel cannot exceed 44 inches from the centerline of the rear axle center
section.
The outside bead seat of the left rear wheel cannot be less than 31 inches from the centerline of the rear axle center
section.
The outside of the right front wheel cannot be farther out than 44 inches, measured from the centerline of the chassis.
F. All cars must weigh a minimum of 1475 lbs. including water, oil and fuel without the driver. Cars may be weighed prior
to and/or following any event.
Sprints:
303 Dimensions and Weight
A. The wheelbase must be at least 84 inches and no more than 90 inches. (See Illustration #3)
B. The overall length will be limited to a maximum of 14 feet.
C. The tread must be at least 47 inches. (See Illustration #3)
D. The maximum width of the main frame tubes, as measured at the rear of the engine, will be 29 inches for a vertical
distance of 24 inches.
E. Chassis and Wheel Offsets:
FOR PAVED EVENTS ONLY The maximum chassis offset allowed, for both front and rear wheels, is four (4) inches (8
inches overall) measured from the centerline of the chassis to the inner wheel bead seat.
The outside bead seat of the right rear wheel cannot exceed 43 inches from the centerline of the rear axle center
section.
The outside bead seat of the left rear wheel cannot be less than 31 inches from the centerline of the rear axle center
section.
The outside of the right front wheel cannot be more than 43 inches from the centerline of the chassis.
The overall width will be limited to a maximum of 78 inches. (See Illustration #3)
FOR DIRT EVENTS ONLY The outside of the right rear wheel, at the outside bead seat of an 18-inch wheel, cannot
exceed 44 inches from the centerline of the rear axle center section.
The outside of the left rear wheel, at the outside bead seat of a 14-inch wheel, cannot be less than 31 inches from the
centerline of the rear axle center section.
The outside of the right front wheel cannot be more than 43 inches from the centerline of the chassis. The overall width
is not limited.
F. Weights
Cars may be weighed prior to and/or following any event.
FOR PAVED EVENTS ONLY - All pavement sprint cars must weigh a minimum of 1,325 lbs. including water, oil and
fuel but without the driver.
FOR DIRT EVENTS ONLY - All National Series sprint cars must weigh a minimum of 1,175 lbs., including water, oil and
fuel but without the driver. USAC/CRA Series sprint cars must weigh a minimum of 1,175 lbs., including water, oil and
fuel but without the driver.
