1984-1995 Porsche 962 and 962C

Images copyright  Michael J. Fuller
Text copyright Michael J. Fuller
Sebring 1991, Joest Porsche 962CThe Porsche 962 arrived on scene in 1984 as essentially a Porsche 956 for the IMSA/US market.  IMSA GTP rules, while differing to Group C in regards to the determination of equivalency between chassis and engines, did utilize chassis regulations that were largely similar, but for one key area, that of safety.  IMSA mandated that the driver's feet had to be behind the front wheel centerline.  Therefore Porsche needed to change the 956 to accommodate this difference and ultimately that meant redesigning the monocoque and giving the car a new designation.  The 962's monocoque was basically a stretched 956 tub with one primary difference; the front suspension was shifted 120 mm forward though the driver's position and seat stayed the same.  The result was that the 962's front overhang was shorter (in order to stay within the maximum regulated length) with the added bonus being that the car was aerodynamically less pitch sensitive compared to the 956.

The 962's story is one of longevity and versatility.  And this longevity has all to do with the solid engineering that went into the car from the start.  As the competition heated up, others may have outperformed the 962 in one category or another, but none could match its performance depth.  That the 962 continued to win races into the mid-90s, when it frankly had no business doing so given the competition and vastly different regulations, is a testament to this.

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1984 Porsche 962-101
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1989 Busby Porsche 962
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1991 Dyson Porsche 962DR2
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1993 Joest Porsche 962C
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1984 IMSA Porsche 962 Specifications
Designer: Aerodynamics: Norbert Signer and Eugen Kolb
Chassis: Horst Reitter

Engine: Hans Mezger 
Layout: Mid-engine, rear-wheel drive
Monocoque: Aluminum sheet
Engine: Porsche type 962/70, 2869 cc, flat-6, single turbo (KKK K36), 2 valves per cylinder, DOHC, air cooled
Engine management: Bosch MS 1.2
Horsepower: 680 hp @ 8200 rpm
Torque: 487 lb-ft @ 5800 rpm
Gearbox: Porsche Type 956/62, 5-speed + reverse, synchromesh, magnesium case with aluminum bellhousing
Clutch: Sachs single-plate clutch
Suspension: F: Upper and lower wishbones, spring/damper (Bilstein) directly acting on lower wishbone

R: Lower wishbone, w/upper rockerarm actuating inboard gearbox mounted spring/damper (Bilstein)
Brakes: Twin single piston caliper mounted on cast magnesium uprights.  Steel discs, F & R: 325 mm diameter
Wheels: Speedline, magnesium
F: 13.0 x 16 inch 
R: 14.5 x 16 inch
Tires: F: 28/60-16
R: 35/65-16
Length: 4770 mm
Width: 2000 mm
Height: 1013 mm
Wheelbase: 2770 mm
Front Overhang: 820 mm
Rear Overhang: 1180 mm
Weight:  850 kgs
Tank capacity: 120 liters
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ęCopyright 2008, Michael J. Fuller