Ford Escort Mk I Twin Cam group 2 (1968)
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Home » Rally Cars » Ford Escort Mk I Twin Cam
ford_escort_twin_cam_1968_700.jpg Source Development chain
1968: Ford Escort Mk I Twin Cam
1970: Ford Escort Mk I RS1600
1975: Ford Escort Mk II RS2000
1983: Ford Escort Mk III RS1600i
1985: Ford Escort Mk III RS Turbo
1992: Ford Escort Mk V RS2000
1993: Ford Escort Mk V RS Cosworth
1996: Ford Escort Mk VI RS2000

Specifications

1263 units built
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Click here and here for street version

Group/Class 2 Homologation number: 1524
Years active 1968-1970 Homologation start: 1/3/1968
Homologation end: 1/1/1977
Engine
Type Ford Lotus Twin Cam, 116E block, straight 4cyl, 4 stroke, petrol engine located front longitudinally
Capacity 1558 cc WRC: 1558 cc
Bore x Stroke (mm) 82.55 x 72.75
Compression ratio 9.8:1
Output power - torgue 115 HP @ 6000 rpm
140 HP @ 6800 rpm
155 Nm @ 4500 rpm
106 lbf @ 5000 rpm
Main bearings 5 with 54mm bearings diameter, 6 bolt flywheel mount connecting rod length between centers 121.9mm, big end type bearing diameter 49.2mm, aluminium alloy piston with 39.5 mm piston height
Materials block: Ford Kent grey cast iron thin wall block (casting 681F-6015G or 701M-6015-EA). 198.2 mm deck height, with 4mm cylinder wall thickness cylinderhead: cross flow aluminium alloy
Cams/valves 2 overhead camshafts (DOHC), chain driven 2 valves/cyl. - 16 valves total, 39mm inlet valve diameter, 33.7mm exhaust valve diameter, 2 coil springs per valve
Aspiration natural, 2 x Weber 40 DCOE carburetors with AC mechanical fuel pump
Ignition Lucas or Luminition electronic, firing order 1-3-4-2 Battery: 12 volt 38 Ah, Lucas C40/1 22-amp d.c. generator
Cooling system watercooled 5.8 lt
Lubrication system wet sump, 1970: dry sump 4.6 lt
Transmission
Type rear wheel drive 4 or 5 (ZF) speed manual gearbox
Gearbox ratios constant: 1.579/1 (30/19)
1st: 2.97/1 (32/17)
2nd: 2.01/1 (28/22)
3rd: 1.39/1 (23/22)
4th: 1.000/1 (-)
R: 3.324/1 (40/19 x 19/22)
constant: 1.471/1 (28/21)
1st: 2.296/1 (31/18)
2nd: 1.697/1 (28/22)
3rd: 1.28/1 (24/25)
4th: 1.000/1 (-)
R: 2.807/1 (40/19 x 19/22)
constant: 1.333/1 (25/17)
1st: 2.84/1 (29/15) or
1st: 3.048/1 (29/14)
2nd: 1.78/1 (23/19)
3rd: 1.47/1 (21/21)
4th: 1.21/1 (19/26)
5th: 1.000/1 (-)
R: 1.74/1 (25/17 x 13/15 x 30/22) or
R: 2.145/1 (25/17 x 13/15 x 30/15)
Diffrential ratio 3.71/1 (34/9), 4.44/1 (40/9), 4.1/1 (33/8), 4.7/1 (33/7), 4.9/1 (34/7), 5.3/1 (37/7), 5.5/1 (39/7), 5.7/1 (34/6), 6.1/1 (37/6), 3.7/1 (37/10), 4.63/1 (37/8), 5.14/1 (36/7), 5.83/1 (35/6), 3.89/1 (35/9), 4.0/1 (36/9), 4.11/1 (37/9), 4.37/1 (35/8) hypoid spiral bevel gears limited slip rear differential
Clutch Borg and Beck dry single plate, 203 mm diameter, 1970: dry dual plate 184 mm diameter
Chassis-body
Type steel monocoque chassis with roll-cage. 2 door saloon steel bodyshell with steel bumpers, and extended wheel arches all around
Front suspension Macpherson strut with 1 lower transverse arm and stabilizer, multi leaf semi-elliptic springs and telescopic shock absorbers
Rear suspension live axle with 4 locating longitudinal links, Panhard rod, single or multiple leaf springs and telescopic gas shock absorbers
Steering system rack and pinion 2.7 turns lock to lock
Brakes front Girling solid disks 244mm diameter and 2 piston calipers 54 mm diameter, 1970: 254 mm disc diameter. Rear drums 229mm diameter with 1 double piston caliper 19 mm diameter, 1971: 22.8 mm piston caliper diameter dual circuit with Girling vacuum servo
Dimensions
length: 3.978 m (156.6") width: 1.608 m (63.0") height: 1.320 m (52.0")
wheelbase: 2.430 m (96.0") front track: 1314.5 m (51.75") rear track: 1333.5 m (52.5")
Rims - tires 5.5 - 6 - 7J x 13"
Weight 750 kg
Fuel tank 41 or 90 lt
Drag coefficient 0.45

Results in WRC

Races

Works team: Ford Motor Co

Season
Entry Rally event
Driver
Codriver
Team M.C SVE
Entry list
S.R KEN A GRE RAC
entry list
Roger Clark
Jim Porter
works 5th
Timo Mäkinen
Henry Liddon
works 7th eng ine tran smis sion
Hannu Mikkola
Gunnar Palm
works gear box oil pres sure tran smis sion
Ove Andersson
Elizabeth Andersson/ Jim Porter
works oil pres sure ther mos tat 3rd
Jean-François Piot
Jean Todt
Ford France diffe rential 3rd 4th
Hodson
Alen
dnf
Ingemar Frohm
Bo Ottosson
8th
Chris Sclater
Peter Valentine
OTL
Bert Gustavsson
Lars Mattsson
dnf
Per Sandager
Otto Kristensen
dnf
Gert Jönsson
Jan Svensson
dnf
Sten Bergström
Kent Böe
dnf
Leif Asserwall
Jan-Åke Siljeström
dnf
Adrian Boyd
Beatie Crawford
4th
Franz Wurz
Walter Zögl
7th
Robert Zelenka
Richard Zelenka
8th
Titus Maier-Kaibic
Kurt Jauk
OAMTC dnf
Brian Culcheth
Johnstone Syer
8th
Tony Fowkes
Peter O'Gorman
15th
Nigel Rockey
Ron Channon
16th
Chris Beynon
Lyn Andrews
17th
Paul Appleby
David Shields
18th
Jim Bullough
Don Barrow
acci dent
Mike Bailey
Joe Minto
?
Miss Bronwyn Burrell
Rob Morgan
?
Mike Hibbert
Derek Tucker
?
Robert Bean
Paul Stephens
?
Ingemar Frohm
Torsten Palm
dnf
Jeffrey Churchill
John Thomas
?
Frank Pierson
Raymond Evans
?
John Rhodes
Frank Webber
?
John Heppenstall
Hywel Thomas
?
Robert Bennett
Stuart Harrold
?
John Booth
Graham Booth
?
Thomas Williams
Stuart Watts
?
Tom Burke
Dan O'Sullivan
?
James Jones
David Williams
?
Roger Clifft
Neil Wilson
?
Roger Drummond Walker
Maxwell Kingsland
?
Michael Dolan
James O'Brian
?
George Beever
Tony Mason
?
Wilfred Jones
John Gittins
?
Trevor Shaw
Fredrick Humphrey
?
Paul Kerridge
William Barlow
?
William Webber
Alan Whitman
?
Charles Drewitt
David Evans
?
John Peniston
Melvyn Long
?
William Crawford
George Dean
?
Melvyn Lonsdale
David Otridge
?
Ian White
Richard Hitchens
?
John Simpson
Anthony Newsum
?
Andrew Frost
Robert Binns
?
James Hannah
Alex Little
?
Desmond Fitzgerald
Richard O'Brien
?
Michael Jackson
Christopher Cammack
?
Colin Barrell
Brian Rann
?
Ronald Harrison
Robert Davis
?
Paul Faulkner
Michael Peters
?
Mallcolm Wise
Douglas Blair
?
Peter Callow
Peter Bradford
?
David Warren
Edward Norman
?
David Bell
Michael Giles
?
Geoffrey Thomas
David Jenkins
?
Erik Nosek
Ronald Boughen
?
William Coleman ?
Total points
()
53 10 3 22 15 3
Statistics
Others starts/finishes 73/14 5/2 10/1 6/4 2/2 50/5

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Drawings

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Electrics diagram

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