Renault 12 Gordini R1173 group 2 (1972)
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Home » Rally Cars » Renault 12 Gordini R1173

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Specifications

5188 units built
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Group/Class 2 Homologation number: 630 and 1633
Years active 1972-1976 Homologation start: 1/10/1971 and 1/1/1972
Homologation end: 1/1/1972 and 31/12/1978
Engine
Type Renault Cleon-Alu type A2L 807-20, straight 4 cyl, 4 stroke, petrol engine located front longitudinal, overhang front
Capacity 1565 cc WRC: 1565 cc
Bore x Stroke (mm) 77.0 x 84.0
Compression ratio 10.25:1
Output power - torgue 115 HP @ 6000 rpm
125 HP @ 6250 rpm
14.4 kgm @ 5000 rpm
150 Nm @ 4500 rpm
Main bearings 5 of 54.8mm diameter, 48mm big end journals diameter connecting rod length 136.25 mm with 3/8" 8740 bolts, big end bearing dimensions D51.6x25mm, small end bearing D20x22mm. Cast aluminium alloy piston with 46 mm compression height. Piston rings 1,75/2/4mm, Piston pin D20 x 66,50mm
Materials block: aluminium alloy with 89mm bore spacing. Steel wet cylinder liners (Outside diameter down: 82,50mm. Outside diameter above: 96,0mm. Height totally: 143,50mm) cylinderhead: cross flow cast aluminium alloy with hemispherical combustion chambers
Cams/valves side camshaft with overhead valves (OHV), chain driven 2 valves / cyl - 8 valves total, 42.1 mm inlet valve diameter, 35.35 mm exhaust valve diameter. 2 coil springs per valve
Aspiration natural, with 2 x Weber 45 DCOE 38/39 carburetors
Ignition ignition bobine / distributor, alternator 12 V, Firing order 1-3-4-2
Cooling system jacketed watercooled with pump, radiator, 304 mm diameter-10 blades fan and thermostat 5.7 lt water capacity
Lubrication system wet sump 4.8 lt oil capacity
Transmission
Type front wheel drive Renault Type: 365.05, 5 speed manual gearbox
Gearbox ratios 1st: 3.61/1 (47/13)
2nd: 2.35/1 (42/18)
3rd: 1.61/1 (37/23)
4th: 1.21/1 (34/28)
5th: 0.93/1 (29/31)
R: 3.08/1 (37/12)
1st: 3.07/1 (43/14)
2nd: 2.23/1 (38/17)
3rd: 1.68/1 (37/22)
4th: 1.29/1 (35/27)
5th: 1.03/1 (32/31)
R: 3.08/1 (37/12)
Diffrential ratio 3.77 (34/9), 4,125 (33/8) Hewland spiral bevel gear limited slip front differential
Clutch Single dry plate Clutch diaphragm spring type. Friction disc with torsion hub damper. Ball bearing thrust. Diameter 145 inner, 215 outer. 200mm outer plate diameter
Chassis-body
Type steel monocoque chassis with roll-cage. 4 door salon bodyshell with steel front and rear bumbers, group 2: extended wheel arches
Front suspension lower triangular wishbone with one (1) upper transverse arm and one (i) upper 45o stabilizing-link. Coil springs, telescopic hydraulic shock absorbers, Φ24mm anti-roll bar
Rear suspension Pressed steel dead axle with 2 longitudinal (trailing) rods, one (1) upper center triangular wishbone, coil springs. Hydraulic shock absorbers. Anti-roll bars
Steering system rack and pinion (no servo) 2.2 or 2.5 turns lock to lock
Brakes front ventilated discs 228mm diameter with 1 piston caliper 54mm piston diameter, rear solid discs 228mm diameter with 1 piston caliper 36/45mm piston diameter dual circuit with vacuum servo
Dimensions
length: 4.300 m (169.3") width: 1.636 m (64.4"), group 2: +100mm height: 1.340 m (52.8")
wheelbase: 2440 mm (96.1") front track: 1340 mm (52.8") rear track: 1335 mm (52.6")
Rims - tires 5.5J x 13" 155 HR 13"
Weight 870 kg f/r distribution 58.2 - 41.8 %
Fuel tank 90 lt

Results in WRC

Season
Entry Rally event
Driver
Codriver
Team M.C SVE KEN MAR GRE A S.R USA RAC
Entry list
J.P. Gailiardon
Pousse - P. Thimonier
dnf dnf
Jovica Palikovic
Sasa Svarcer
dnf
Felix Capra
Michel Peyret
Ecurie Monaco dnf+
Alain Calais
Jean-Claude Silani
dnf
Dahms
Mme Dahms
dnf+
Ove Andersson
John Davenport
15th*
Jean-Luc Thérier
Claude Roure
oil pump*
Jean-Marie Jacquemin
Jacques Jaubert
dnf
Wolfram Isopp
Werner Pucher
Bosch Racing Team 12th
G. Pfisterer
F. Ritter
dnf
A. Coppier dnf
John Smith
Robert Clayton
dnf
Keith Leckie
Peter Robinson
?
Statistics
Others starts/finishes 14/2 5/0 2/1 1/0 4/1 1/0 1/0

*Group 1 entries


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Drawings

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Suspension

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Engine specs (low compression)

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ENGINE (807‑03; auto., 807‑05)

1. Type … … … 4 stroke; double‑row, inclined O.H.V.; side camshaft
2. Cooling system Water pump, radiator (9.25lb./in.sq), fan and thermostat (82°C.).
2a. Sealed system; clean and refill every 27,000 miles or 3 years
3. Number of cylinders … 4 (wet liners)
4. Firing order and idling 1‑3‑4‑2 (No. 1 by flywheel);
4a. Speed and R p m 625/675(auto., 600/650 r.p.m.)
5. Bore … … … 77mm. (3.031in.)
6. Stroke … … … 84mm. (3.307in.)
7. Cubic capacity … … 1565c.c.
8. Compression ratio … 8.6:1
9. Brakehone‑power (S.A.E.) 87.5 at 5,750 r.p.m.
10. Torque (S.A.E.) … 90lb.ft. at 3/4,000 r.p.m.
11. Piston oversizes … … Matched piston and liner sets
12. Piston clearance Matched piston and liner sets
13. Piston rings 2 Compression 1 Oil (Uflex)
14. Piston rings‑width Firing, 1.75mm.; comp., 2mm.; oil,4mm.
15. Piston rings ‑‑‑ groove cl'nee Comp., .050 to .075mm.; oil, .015 to.060mm.
16. Piston rings‑gap (in bore) 0.25 to 0.40mm.
17. Oil pressure (lb./sq.in.) 28 to 32 at 650 r.p.m.; 57 to 77 at 4,000 r p.m
18. Gudgeon pin diameter … 20mm
21. Crankpin diameter … 48mm:
22. Crankpin undersize … 47.75mm.
23. Connecting rod length … 136.25mm. (centres)
24. Big‑end hearings … Alunninium‑tin, thin shell
27. Main journal diameter … 54.8mm.
28. Main journal undenize … 54.55mm.
29. Main bearings … … 5; alunninium‑tin, thin shell
30. Main bearing length … 20.4mm
31 Main bearing clearance … .038 to .079mm.
32 Crankshaft end‑float … 0. 05 to 0. 23mm
33. Crankshaft end‑thrust on Centre main bearing
34. Camshaftjournal diameter 42mm
35. Camshaft bearings … 4; direct in block
36. Camshaft bearing cl'nce… .025 to .075mm.
37. Camshaft end‑float … 0. 05 to 0. 12mm
38. Camshaft drive type … Chain, 72x9.525mm.pitches;width,5.72mm.
39. Valve head diameter … Inlet, 40mm; exhaust, 35mm
40. Valve stem diameter … 8mm., inlet and exhaust
41. Valve seat angle ‑‑‑45°
42. Valve lift … … 8.69mm, inlet and exhaust
43. Valve guide length … 50mm (fitted height, 9mm. above head)
44. Valve stem/guide cl'nee … Inlet :025 to .045mm.; exhaust, .040 to .060mm.
45. Valve spring free length … Inner, 46.8mm.; outer, 54.3mm.
46. Valve spring rate … … Inner, 24.5mm. at35lb.;outer,30.5mm. at 114lb.
47. Valve working clearance Inlet, .008in.; Exh, .010in. (cold)
49. Valve timing Inlet opens 21° B.T.D.C.;Exh 59° A.B.D.C.
49a. Exh 59° B.B.D.C.;closes 21° A.T.D.C.
50. Petrol pump … A.C. mechanical
51. Carburettor … Weber 32DAR‑6 (auto., 32DIR22)
51a. Primary Secondary
52. Choke tube … 24 26
53. Main jet … … ‑‑‑ 145(auto.140) 150
54. Compensating jet … 180 (auto.190) 140
55. Slow‑running jet 50 80
62. Needle valve 1. 75mm,

ELECTRICAL SYSTEM

601. Ignition timing (static) … 0°± 1° (auto., 6°± l° B.T.D.C.); marks
601a. [Also strob., vac. off] on flywheel and housing
602. Sparking plugs … A.C. 44XL, Marchal 35HS or Champion
603. Sparking plug gap … 0.6mm. (.024in.) IN3
604. Distributor … Ducellier R243/D59; auto., R266/D59
605. Contact breaker gap 0,4 to 0.5mm. (.016 to .020in.); dwell angle 57°±3°
606. Centrif. advance starts at 450 r.p.m.; 7° at 700 r.p.m.
607. Centrif. advance‑max…. 18° at 2500 r.p.m.; auto., 16.5° at 2250
608. Vacuum advance starts at 75mm. (2.95in.) Hg.; 50 at 200mm. (7.9in.)
609. Vacuum advance max 7° at 365mm. (14.4in.) Hg.
609a. (Distributor degrees and r.p.m.)
610. Ignition coil … … Ducellier, type 2765A
611. Battery … … 12v. 40a.h.; Fulmen, AS810
612. Battery earth … … Negative
613. Alternator … … S.E.V.; type A12130; max. output 30amp.
614. Control box … … S.E.V., regulated between 13.8114.8v.
615. Starter motor … … Paris‑Rhone, type D8E84. Lock torque

CAPACITIES

701. Engine sump … … 7 pints (7.5 when filter changed)

TORQUE SPANNER DATA (lb.ft.)

901. Cylinder head nuts (cold) 55/60
902. Big‑end bearing nuts … 30
903. Main bearing nuts … 45
905. Flywheel bolts … … 40 (auto drive plate, 22/26)

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