1974 Shadow DN4


1974 Shadow DN4

1974 Shadow DN4

In 1974 Jackie Oliver became the Cam-Am champion driving one of these DN4 Shadows. It replaced the DN2 of 1973, and kept the same basic engineering. The DN4 was particularly suited to embrace the fuel restrictions that limited overall fuel consumption to 37 gallons. The DN4 was so good in this category only George Follmer in another DN4 could challenge Oliver.

George said “There’s no substitute for horsepower, but chassis-wise the DN4 pointed in well and was very predictable. And because frontal area was so small, it was fast in a straight line. It was an extremely good race car”

The DN4 was built with typcial Cam-Am engineering of the period. The Semi-monocoque chassis was riveted together from aluminum was covered by a thin fiberglass body. The engine was sourced from Chevrolet and produced anywhere from 735 to 800 bhp.

Main competition came from Brian Redman and his Porsche 917/30KL, but that didn’t stop Jackie Oliver from winning the first four races outright.

Bonham’s Auction

At their Important Sale of Collectors’ Motorcars and Automobilia on 18 Aug 2006 at the Quail Lodge Resort, Bonhams sold the only Chassis no. DN4-2A for $381,000 inclusive of Buyer’s Premium. It was described as “IThis beautifully presented car, evidently concours-prepared before its long yet pampered duty on display within the Rosso Bianco museum at Aschaffenburg, is accompanied by a Bill of Sale, dated August 9, 1987 from Thomas Frederick to Peter Kaus.

Mr Peter Kaus confirms that he bought this car from Mr Don Nichols on the expressed understanding that this was the DN4 chassis driven by Jackie Oliver to win the 1974 CanAm Championship title.”

In Detail

type Series Production Car
built at Santa Ana, California, USA
engineers Tony Southgate
production 3
predeccesor 1972 Shadow DN2
engine Chevrolet 90º V8
position Front, Logitudinal
aspiration Natural
block material All-Aluminum
valvetrain Pushrod OHV, 2 Valves per Cyl
displacement 7439 cc / 454 in³
power 548.1 kw / 735 bhp @ 7000 rpm
specific output 98.8 bhp per litre
body / frame Fiberglass Body over Aluminum Semi-Monocoque Tub
driven wheels RWD
transmission Hewland 4-Speed Manual
fuel capacity 170.33 litres or 45 gal.
key drivers Jackie Oliver, George Follmer
race victories 1974 Mosport, 1974 Watkins Glen, 1974 Atlanta, 1974 Mid-Ohio

 

Auction Sales History

1908 Simplex 50 Speedcar Roadster – sold for $1,900,000

Chassis No. 211. The oldest Simplex known to exist. 587 CI engine bored to 600 CI. 4 cylinder with T-Head valve configuration. Early engine plugs over intake. Correct Simplex carburetor. Centrifugal water pump. Rare Bosch B magneto. Four forward gears with reverse. Double side chain drive. 40 gallon fuel tank, 13 gallon oil tank. Solar head, side and tail lamps. Authentic instruments and original gauges. Special 5 inch radiator core. Outside exhaust system
New aluminum crankcase. New pistons, rings, bearings, crank. Rare 27 inch hat box compartment inside spare tires. Current restoration just completedAuction Source: 2012 Daytime Auction by Mecum

1974 Shadow DN4 Can-Am DN4-4A – did not sell for

1974 AVS UOP Shadow DN4-4A Can-Am, 1 of 5 built. Original fuel-injected 494/800 HP Chevrolet big block V-8. Engine recently serviced by Slade Racing Engines. Hewland 4-speed manual gearbox. Aluminum semi-monocoque tub, fiberglass body panels. 4-wheel independent suspension, 4-wheel disc brakes. Mosport World Sports Car Championship race, August 22, 1976. Qualified by Jackie Oliver on pole at 1:15.320, won race. Always maintained as original. Offered by AVS Shadow creator Don Nichols. Possibly the most well preserved original Can-Am car in existence. Sold on bill of sale.

Auction Source: 2012 Daytime Auction by Mecum