Porsche 964 Turbo group B or GT1 (1993)

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5097 units built
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Homologation number: B298
Homologation start: 1/4/1993


Porsche M64/50, boxer 6 (180o) cyl, 4 stroke, petrol engine. Click here
3600cc, 100.0 x 76.4 mm
283 kW / 380 hp @ 5750 rpm
520 N·m / 384 lb·ft @ 5000 rpm
aluminium alloy block and heads, aluminium alloy cylinders with internal 0.1mm thick nicasil coatings
forged steel crankshaft with 8 plain main bearings 60mm diameter, 55mm big end journal diameter
titanium connecting rods
small end bearigns diameter 23.02+0.013mm, width 25-0.5mm
big end bearings diameter 58+0.019mm, width 21.7+0.1mm
play between the bush & pin 0.020…0.039 max 0.055mm
Single Overhead camshaft (SOHC) one per bank, double chain drive, 2 valves/cyl - 12 valves total
aspiration, 1 x Turbocharger with Bosch DME multipoint electronic fuel injection
twin spark, Bosch EZ69 electronic ignition control unit
air cooled
dry sump
5 speed manual gearbox
final drive, 3.44/1
steel body
rack and pinion steering
ventilated discs all around, 322mm front disc diameter, 299mm rear disc diameter
Length 4270 mm (167.3")
Width 1753 mm (69.0")
Height 1308 mm (51.5")
Wheelbase 2272 mm (89.4")
Front track 1434 mm (56.5")
Rear track 1493 mm (58.8")
rims, front 8J x 18", rear 10J x 18"
tires, front 225/40 ZR 18", rear 265/35 ZR 18"

Results in BPR International GT Endurance Series and in FIA GT Championship

Car entry Car number, result
Paul Ricard Jarama Dijon Paris Valle lunga Spa Suzuka Zhuhai
Team 4h 4h 4h 1000km 4h 4h 1000km 3h
Obermaier Racing #11, fan belt
Obermaier Racing #12, in entry list #12, dnf #12, in entry list #12, gear box
Hunter Racing Team #11, dnf
Guy Broissiat, (GT3) #52, 13th
Starts/finishes 5/1 1/0 3/1 1/0

Team and drivers entries

Results in Endurance races

Classification in group GT is noted in brackets
Car entry, chassis number Car number, result
Daytona Sebring Le Mans
Date 6/2 19/3 19/6
Duration 24h 12h 24h
Team\ Championship IMSA IMSA
Champion Porsche, WP0AA296XMS480188 #72, acci dent #72, mecha nical
Team Gunnar #77, 13th
Works Starts/finishes 3/1 2/1 1/0

Team and drivers entries

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