1974-Shadow-DN-3/5A Formula One Race Car

Description

This car is currently not at Fantasy Junction but can be viewed by appointment.

1974 Shadow DN-3/5A Formula One race car
s/n DN-3/5A
Black with Black interior

DN-3/5A is the second formula one car designed by Tony Southgate for the AVS Shadow team. One of five made, it has been completely restored to its original design condition with documented history.

Sponsored by petroleum research firm Universal Oil Products (UOP) in 1974, the black DN-3’s were very quick cars in the hands of Peter Revson, JP Jarier, Brian Redman, Bertil Roos and Tom Pryce, during the 1974 F1 season. Elegantly designed by Southgate, these cars stood out among the more agrarian looking counterparts of the era.

DN-3/5A was originally built as the team’s second spare car, but was hurriedly pressed into service for the British GP after Tom Pryce damaged his primary racecar in the prior GP of France. This car was configured with the larger front rotors, high camber-gain front suspension, long wheelbase and copper radiators.

To avoid the complexity of refilling European customs paperwork, the team transferred the crashed car’s number plate (DN-3/3A) to this new chassis. Pryce used DN-3/5A (nee DN-3/3A) to score his first GP points in Germany the following race. This would be this only Grand Prix points scored by /5A.

This car was used for the first two races of the ’75 season, and re-numbered DN-3/3AB, as Pryce’s’ primary race car until a second DN-5 was completed. At that point it was used as the team’s primary spare car for the next three races.

DN-3/5A was sold, along with DN-3/2A and /4A, at the end of the 1975 season to Roger Springett to run in the ’76 Aurora F1 series under the PR Reilly banner, where it never raced. For 1977 it was sold to Phil Bennett as his spare car to run in the Aurora series. Phil sold it to English collector and enthusiast John Carpenter, who raced it once, then sold it on to another collector Rod Tolhurst.

From there the car passed through three other collectors’ hands to end up in un-restored but very original condition with George Stauffer. George sold it to Alex Posinello of Toronto, Canada, where it transferred to G.A. Thornton of Michigan.

At the point, the car underwent a complete tear-down and full restoration, led by former Shadow Crew Chief, Barry Evans. Barry and George use photos, recollections and period parts from Don Nichols AVS shop to rebuild the car. Assistance in getting the car to its pristine and correct condition goes to: Allan Rees (Shadow Team Manager), Tony Southgate (Shadow designer), Don Nichols (Shadow principle), Bernard Cahier (Shadow PR), Billy Woolridge (Shadow fabricator), Colin Richardson (Armstrong Shocks Race tech), Ray Hulbert (AP Lockheed brakes race tech), Tony Nicholson (Robin Auto principle) and John Steenson (Nicholson DFV rebuilder).

The car was restored to its 1974 British GP configuration, as /5A appeared in its first race.

History:
• This car was the UOP Shadow team car for T. Pryce during the 1974 season. Unique car with limited race mileage, hence excellent, original condition.

Recent Competition History:
• It has been in collector’s hands since the end of its GP career, and not raced since 1980.
• It underwent extensive shakedown at Infineon Raceway, July 2012 and is in track ready condition.

Engine:
• Cosworth DFV (dyno’ed at 475 hp) rebuilt by John Stenson (ex-Nicholson), zero miles, long stroke, F1-SA cams.
• Headers fabricated from original Shadow parts (stainless steel, coated with WD-40 for original look)
• Inlet trumpets newly fabricated from original McLaren designs (circa ’74, with more velocity than one’s Shadow actually used)

Fuel System:
• Lucas mechanical pumps; new, original Marston fuel bladders

Gearbox/Final Drive:
• Hewland TL200-1completely rebuilt by original Shadow transmission mechanic.
• It is built with all original (and rare helical cut gears, with Hewland in-unit final drive.
• Final drive has additional oiling system based on Shadow mechanics re-collection of historical issues (!)
• While most other English F1 teams were using the Hewland FG/A400 gearbox, Shadow opted for the Hewland TL, derived from their long distance engineering efforts (Gulf Mirage), and hoped to find greater reliability given the increased DFV outputs at the time.
• Half shafts newly machined with new CV’s and bearings

Oil/Water Systems:
• Original Marston copper side pod radiators; original nose oil cooler. All flushed, cleaned and pressure checked.

Electrical System:
• Lucas Opus Ignition, with original Lucas spark box (includes ’76 Copersucar yellow card). All electrical lines replaced with period correct wires and harnesses

Body:
• New nose & wings from original mold (D. Nichols provided), with original designed adjustable flaps and blue anodized end caps
• Newly molded center section, off original, in fiberglass
• Original long-skirted airbox, completely re-finished, with original inlet trumpet aluminum tray
• RHS original side pod, LHS molded new
• Rear wing rare “flexi-wing” used early in the season by P. Revson, then later by JP Jarier during Paul Ricard test

Monocoque:
• Aluminum Monocoque in excellent, original shape. Track scraps at front underside indicate original use. No damage to tub, with excellent patina. Mechanics notes, scribed in black marker, found inside of Monocoque fuel cell area, indicating chassis #5A.
• Suspension pick-up points removed and zinc plated.
• Roll bar original titanium with no scratches or damage.

Chassis:
• Front upper and lower wishbone suspension newly made from original drawings (supplied by D. Nichols)
• Front uprights original magnesium units with titanium ball studs
• Rear suspension (long wheel base) all original
• Rear uprights, newly cast in aluminum (ilo magnesium)
• Front/rear outboard Armstrong coil over shocks (all original and fully re-built by Bruce Richey)
• Original AP Lockheed F1 calipers front/rear with ¾” bores, matched with master cylinders (fully re-built)
• Shadow rack and pinion steering system, newly cast Shadow magnesium wheels, with original tire locks.

Cockpit:
• Graviner cockpit fire system (very original system, unrestored).
• Restored Graviner medical oxygen system
• Newly constructed Shadow steering wheel (from T. Pryce original which mechanics had)
• Bostrom (UOP) fiberglass seat, covered with ’74 VW basket weave vinyl (exactly as original)
• Smith’s gauges, with correct gradations and scale
• Original adjustable titanium pedals
• New Willans harnesses (circa 1974 2.0 in” wide belts).

Spares:
• DFV #016 block
• Set of Shadow DN-3 magnesium wheels with mounted Goodyear rains
• New, old stock fuel bladder
• Side pod mould
• Various spare electrical spare parts
• Nose frame
• Spare front uprights and various suspension components
• New set of Willans FIA legal harness (3.0” wide belts)
• Air box (short shirt design)
• Spare medical oxygen bottle
• Various other Shadow parts