Ford Escort Mk II RS group 4 (1975)
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Home » Rally Cars » Ford Escort Mk II RS1800
FordEscortRS1800.jpg Source Development chain
1976: Ford Escort Mk II RS
1980: Ford Escort Mk III RS1700T
1997: Ford Escort Mk V WRC
1997: Ford Escort Mk VI Maxi
Development level
Group 4
Group 2

In rallies: see video
Click here (book)
Portugal register

Specifications

109 road cars built (RS1800)
Click here
Click here and here
Click here and here for street version

Group/Class 4/3 Homologation number: 1605 and 650
Years active 1975-1981 Homologation start: 1/5/1975 (18/4E) and 1/4/1977
Homologation end: 31/12/1982
Engine
Type Cosworth BDA 1.84 or BDG, straight 4cyl, 4 stroke, petrol engine located front longitudinally
Capacity 1840 or 1975 cc WRC: 1840 or 1975 cc
Bore x Stroke (mm) 86.88 or 90.0 x 77.62
Compression ratio 11.5:1
Output power - torgue 190 HP @ 7500 rpm (RS1800), 234 HP / 172 KW @ 8200 rpm (carburetors, group 2)
works 240-255 HP / 8000 rpm (carburetors, group 4)
270 HP / 9000 rpm (bosch kugelfisher injection)
138 ft/lb @ 6500 rpm (RS1800), (217 Nm) / 6750 rpm
29.0 kgm (284 Nm) @ 6000 rpm
Main bearings 5 with 54mm bearings diameter Connecting rod length 5.230" (132.842mm), big end type bearing diameter 49.215mm
Materials block: Ford Kent aluminium alloy block with 209mm deck height and 96mm bore spacing (casting H721F-6010AA) cylinderhead: aluminium alloy
Cams/valves 2 overhead camshafts (DOHC), belt driven 4 valves/cyl. - 16 valves total, 31mm inlet valve diameter, 25.65mm exhaust valve diameter, 1 coil springs per valve
Aspiration natural, 2 x Weber 36 DGAV, or 2 x Weber 48 DCOE carburetors, or Bosch Kugelfischer Pump Type PL044 mechanical fuel injection
Ignition Lucas or Luminition electronic, firing order 1-3-4-2 12 or 24V Starter motor circuit
Cooling system watercooled 6.1 lt
Lubrication system dry sump with 2 oil pumps 4.6 lt
Transmission
Type rear wheel drive ZF 5S18/3, 5-speed manual gearbox
Gearbox ratios constant: 0.968/1 (30/31)
1st: 2.298/1 (38/16)
2nd: 1.798/1 (39/21)
or (1978+) 2nd: 1.599/1 (38/23)
3rd: 1.355/1 (35/25)
4th: 1.141/1 (33/28)
5th: 1.000/1 (-)
R: 2.909/1 (32/11)
Group 4: constant: 1.259/1 (34/27)
1st: 3.874/1 (40/13)
2nd: 2.398/1 (40/21)
3rd: 1.763/1 (35/25)
4th: 1.259/1 (30/30)
5th: 1.000/1 (-)
R: 2.909/1 (32/11)
4 first gears from any below combination:
3.36/1 (29/15 x 33/19)
2.8/1 (26/18 x 29/15 )
2.792/1 (26/18 x 29/15)
2.293/1 (26/18 x 27/17)
1.81/1 (24/13 x 33/19)
1.81/1 (25/20 x 29/20)
1.575/1 (26/18 x 24/22)
1.510/1 (26/18 x 23/22)
1.39/1 (23/24 x 29/20)
1.384/1 (26/18 x 23/24)
1.27/1 (33/19 x 19/26)
1.264/1 (26/18 x 21/24)
1.155/1 (26/18 x 20/25)
5th: 1.000/1 (-)
1977: 2.052/1 (26/18 x 27/19)
1977: 1.213/1 (26/18 x 21/25)
R: 2.909/1 (26/18 x 32/11)
Diffrential ratio Production axle: 3.444/1 (31/9), 3.71/1 (34/9), 3.54/1, 3.77/1, 3.889/1 (35/9), 4.125/1 (33/8), 4.44/1 (40/9), 4.7/1 (33/7), 5.14/1 (36/7), 5.28/1 (37/7), 5.5/1 (39/7),
Heavy duty axle: 3.09/1, 3.22/1, 3.444/1 (31/9), 3.75/1, 3.89/1 (35/9), 4.11/1 (37/9), 4.375/1 (35/8), 4.63/1 (37/8), 4.86/1 (34/7), 5.14/1 (36/7), 5.28/1 (37/7), 1976: 3.56/1 (32/9)
1977: 3.7/1 (37/10), 4/1 (36/9), 5.375 (43/8), 5.83/1 (35/6)
hypoid spiral bevel gears limited slip rear differential. Oil cooler for rear axle
Clutch dry single plate 203 mm diameter, or double plate 184 mm diameter (CP2604), Group 4: triple plate
Chassis-body
Type steel monocoque chassis with roll-cage. 2 door saloon steel bodyshell with extended wheel enlarged arches and coated steel bumpers
Front suspension Macpherson strut with 1 lower transverse arm and stabilizer, coil springs and telescopic gas shock absorbers
Rear suspension live axle with 4 locating longitudinal links, Panhard rod, multiple leaf springs and telescopic gas shock absorbers
Steering system rack and pinion 2.4 turns lock to lock
Brakes front ventilated disks with 265 or (1978+:) 279/292/300mm diameter and 4 piston calipers AP Racing CP2361 (Forestry) or CP2270 (Monte Carlo). Rear drums 229mm diameter, or solid or ventilated disks 244/254/265/292mm diameter with 2 or 4 (38mm) piston calipers, AP CP2382 (vented discs) or AP CP2383 (solid discs) dual circuit with servo, adjustable ratio split front to rear
Dimensions
length: 3.978 m (156.6") width: 1.607 m (63.2"),
Group 4: 1.700m (66.9")
height: 1.384 m (54.5")
wheelbase: 2.407 m (94.75") front track: 1314.5 mm (51.75") rear track: 1333.5 mm (52.5")
Rims - tires front, 6x13", rear 7x13", or 15" 175/70 HR 13, 195/50-R15
Weight 980 - 1040 kg
Weight/power 3.9 kg/HP
Fuel tank
Drag coefficient 0.45

Results in WSCC

Group 2, BDA 1840 cc engine

Season
Car entry Car number/ result
Mugello Valle lunga Silver stone Nurb Zeltweg Watkins Glen Dijon
Team 6h 6h 6h 1000km 6h 6h 6h
Derek McMahon racing #56, dns
Tony Brennan/ Arthur Collier #58, 9th (1st)
Total points
2
2
Statistics
Works Starts/finishes 2/1 2/1
Driver Team entries and car number
The Lep Group of Companies #57, OTL
Derek McMahon racing
Alec Poole 57
Derek McMahon 57

Results in WRC

Races

Works team: Ford Motor Co

Season

Group 2
Entry Rally event
Driver
Codriver
Team M.C SVE KEN GRE MAR POR FIN S.R TdC RAC
Timo Mäkinen
Henry Liddon
works 3rd tires 1st*
Roger Clark
Jim Porter
works tires 2nd
Billy Coleman
Dan O'Sullivan
Thomas Motors of Blackpool 6th
Ari Vatanen
Peter Bryant
Independent Radio News / Motocraft acci dent
Russell Brookes
John Brown
Birmingham Post / Andrews Heat for Hire dnf
John Taylor
Mike Broad
Haynes of Maidstone dnf
Russell Close
Colin Wilson
Team Avon Tyres dnf
Jill Robinson
Dilys Rogers
Team Avon Tyres dnf
John Cockerill
John Lawson
ICI Petrol dnf
Total points
()
32 8 24
Statistics
Others starts/finishes 12/4 1/1 2/0 9/3

*Allied Polymer Group entry


ralfrallye_1136731957_75.granite.mk2.clark.jpg Source
Roger Clark in first appearence in Granite City rally '75
Ford_Escort_RS1800_-_Race_Retro_2008_05.jpg
ford-escort-rs1800-hannu-mikkola-rac-rally-1980-eaton-yale-796-p.jpg Source
Hannu Mikkola in RAC rally '80

Drawings

autowp.ru_ford_escort_rs1800_4.jpg Source
escortcutawaywestwalesr.jpg Source
Motoring-2016.jpg Source
ford-e-escort-mkii-rs1800-rallye.png Source
ford_escort_mk_ii_1975.jpg Source

Chassis and body

mk2dimensions1.jpg
mk2floorasembly.jpg
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