USAC Midget/Silver Crown

Engine

    Type: Normally aspirated, internal combustion, four cycle, piston type with a maximum of six cyclinders. The most popular design has 166 cu. ins. (2721cc)
    Horsepower: 325 to 350
    Speed: Fastest official lap average is 139.265 mph set by Ryan Newman at Pikes Peak International Raceway, June 7, 1997.
    Fuel: Methanol

Drive Train

    Drivetrain: Direct drive without clutch or transmission. Quick change gears are behind the rear assembly.

Chassis/Body

    Chassis: Tubular 4130 aircraft steel; minimum 1 3/8 inch O.D. and .095 wall thickness
    Weight: 900 pounds minimum, without driver

Suspension

    Type: Solid front and rear axels with torsion bar or coil spring suspension

Wheels and Tires

    Wheels: Aluminum or magnesium, 13 inches in diameter. Right rear 10 inches wide, all others 8 inches wide.
    Tires: Bias-Ply racing tires
    Brakes: 3 or 4 wheel discs

Dimensions

    Wheelbase: 66 inches min., 76 inches max.
    Overall Length: 10 feet average
    Overall Width: 65 inches maximum
    Overall Height: 57 inches avg. to top of roll cage
    Track Width: Front-46 inches. Rear-43 inches
    Fuel Capacity: 17 gallons
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