Home » Racing Sports Cars » Lotus 23
Source
Chassis numbers
Specifications
131 units built
Click here for Lotus spares
Click here and here and here for Cosworth
Click here for Cosworth
Click here for 23B
engine location, middle longitudinally
Coventry Climax FWA "85", straight 4 cyl, 4 stroke, petrol engine
1098cc, 72.4 x 66.68 mm
9.8 : 1
63.5 kW / 85 hp @ 6250 rpm
100 Nm / 74 ft-lb @ 4400 rpm
drop forged steel crankshaft with 3 main bearings
2 valves / cylinder, SOHC
aspiration, natural with 2 x 1-1/2" SU H4 horizontal carburetors
distributor ignition
water cooled
Ford Kent / Cosworth Mk III, straight 4 cyl, 4 stroke, petrol engine
997cc, 80.9625 x 48.4 mm
85-90 HP
cast iron Ford Kent 105/107E block, cast iron heads
3 main bearings
A3 side camshaft with overhead valves (OHV), 2 valves/cyl - 8 valves total
aspiration, natural
water cooled
dry sump
Ford Kent / Cosworth Mk IV, straight 4 cyl, 4 stroke, petrol engine
1098cc, 80.9625 x 53.3 mm
90-95 HP
cast iron Ford Kent 105/107E block, cast iron heads
3 main bearings
A3 side camshaft with overhead valves (OHV), 2 valves/cyl - 8 valves total
aspiration, natural
water cooled
dry sump
Ford/Lotus Twin Cam / Cosworth Mk IX, straight 4 cyl, 4 stroke, petrol engine
1498cc, 80.9625 x 72.75 mm
100-120 HP @ 5700 rpm
cast iron Ford Kent 116E-6015 block, cast iron heads
5 main bearings
A3 side camshaft with overhead valves (OHV), 2 valves/cyl - 8 valves total
aspiration, natural with 2 x Weber 40 DCOE/2
water cooled
Dry sump
Ford/Lotus Twin Cam / Cosworth Mk XII, straight 4 cyl, 4 stroke, petrol engine
1594cc, 83.55 x 72.75 mm
9.5:1
140 bhp / 104 KW @ 6500 rpm
cast iron 116E-6015 block, cast iron heads
5 main bearings, 125E Type C conrods
dual overhead L1 CPL2 26/66/66/26 camshafts (DOHC) chain driven, 2 valves/cyl - 8 valves total. 40mm inlet valve diameter, 33.7mm exhaust valve diameter. 27o angle between inlet/exhaust valve axis and vertical (54o angle between inlet and exhaust valves axis)
aspiration, natural with 2 x Weber 45 DCOE 152
Lucas distributor. Lucas AB14 electronic ignition amplifier. Lucas Sport ignition coil. Accel 8mm Super Stock radio supression core spark plug wires
water cooled
Dry sump with Brian Hart oil pump and Racor tattletale oil filter
Maserati Tipo 60, straight 4 cyl, 4 stroke, petrol engine
1990cc, 93.8 x 72.0 mm
9.8:1
200 bhp / 149 KW @ 7800 rpm
alloy block and head
2 valves / cylinder, DOHC gear driven
aspiration, natural with 2 x Weber 45 DCO3 Carburetors
twin spark
dry sump
Coventry Climax FWMC, straight 4 cyl, 4 stroke, petrol engine. FWM meaning Feather Weight Marine
742cc, 76.2 x 80.0 mm
aluminium alloy block, aluminium alloy "crossflow" head
2 valves / cylinder, DOHC chain driven
water cooled
Hewland Mk III, 5 speed manual gearbox
dry double plate clutch
steel multi-tubular spaceframe chassis, fibreglass bodyshell
Front Susp.: unequal length, non-parallel dual wishbone suspension. Alford & Alder forged uprights. Koni double-adjustable aluminum-bodied coilover shock absorbers. Eibach springs. Adjustable anti-sway bar.
Rear Susp.: inverted lower wishbones, single top links, and twin adjustable trailing links. Lotus proprietary magnesium uprights. Koni double-adjustable aluminum-bodied coilover shock absorbers. Eibach springs. Non-adjustable anti-sway bar.
Girling aluminum calipers. 9" solid discs, all-round
Length 3530 mm (139 in)
Width 1447 mm (57 in) - 1524 mm (60 in)
Height 584 mm (23 in)
Wheelbase 2286 mm (90 in)
Track (fr/r) 1308 mm (51.5 in) / 1270 mm (50 in)
wheels, Lotus magnesium racing wheels 5x13" 4-lug front, 6x13" 6-lug rear
tires, front 4.50–13" or 5.0/22.0-13", rear 5.50–13" or 6.5/23.0-13"
450kg
fuel tank, 36 lt
Results in WSCC
Season races for Sports/Prototypes
| Car entry, chassis number |
Car number/ result |
|
Dayt |
Sebring |
Targa Florio |
Nurb |
Le Man |
d' Auvergne |
Bridgeh |
Paris |
| Team |
3h |
12h |
|
1000km |
24h |
|
400km |
1000km |
|
| Lotus (Mk IV) |
|
#70, in entry list |
|
|
|
|
|
|
| Lotus, 23/S/28 (Mk IV) |
|
#71, in entry list |
|
|
|
|
|
|
| Lotus, K-23-AZ (Cosworth Mk III) |
|
|
|
|
#47, rejected |
|
|
#43, in entry list |
| Ian Walker (Cosworth Mk III) |
|
|
|
#64, over heating |
|
|
|
|
| Ian Walker (Cosworth Mk III) |
|
|
|
#65, 8th |
|
#47, in entry list |
|
|
| Ian Walker (Cosworth Mk X DOHC) |
|
|
|
|
|
#24, 22nd |
|
|
| Essex Racing Team (Cosworth Mk X DOHC) |
|
|
|
#84, dnf |
|
#18, 2nd |
|
|
| UTD Laystall Racing Team, 23/S/8 (Climax FWMC) |
|
|
|
|
#48, rejected |
|
|
|
| Lotus France, 23/S/8 (Cosworth Mk III) |
|
|
|
|
|
|
|
#42, 11th |
| Bernard Consten (Cosworth Mk III) |
|
|
|
|
|
#44, 9th |
|
|
|
Total points
14 |
|
|
|
3 |
|
11 |
|
|
| Statistics |
| Works Starts/finishes 7/6 |
|
|
|
3/1 |
|
3/3 |
|
1/1 |
| Drivers |
Team entries and car number |
| Lotus |
| R. J. Henry |
|
70 |
|
|
|
|
|
|
| Ernie Harris |
|
70 |
|
|
|
|
|
|
| Bill Stone |
|
70 |
|
|
|
|
|
|
| Sy Kaback |
|
71 |
|
|
|
|
|
|
| Harvey Snow |
|
71 |
|
|
|
|
|
|
| Jim Clark |
|
|
|
84 |
47 |
|
|
|
| Trevor Taylor |
|
|
|
84 |
47 |
|
|
|
| Mike Spence |
|
|
|
|
|
47 |
|
43 |
| Peter Arundell |
|
|
|
|
|
|
|
43 |
| Ian Walker |
| Paul Hawkins |
|
|
|
64 |
|
24 |
|
|
| Peter Ryan |
|
|
|
64 |
|
47 |
|
|
| Peter Ashdown |
|
|
|
65 |
|
|
|
|
| Bruce Johnstone |
|
|
|
65 |
|
|
|
|
| UTD Laystall Racing Team |
| Les Leston |
|
|
|
|
48 |
|
|
|
| Tony Shelly |
|
|
|
|
48 |
|
|
|
| Essex Racing Team |
| Alan Rees |
|
|
|
|
|
18 |
|
|
| Lotus France |
| Bernard Consten |
|
|
|
|
|
44 |
|
42 |
| José Rosinski |
|
|
|
|
|
|
|
42 |
Season races for Sports/Prototypes
| Car entry, chassis number |
Car number/ result |
|
Sebring |
Targa Florio |
Nurb |
Consuma |
Rossfeld |
Le Man |
d' Auvergne |
Freiburg |
Ollon |
| Team |
12h |
|
1000km |
Hill climb |
Hill climb |
24h |
|
Hill climb |
Hill climb |
|
| Duchess Auto Co (Cosworth Mk IX) |
in entry list |
|
|
|
|
|
|
|
|
| Lotus Sweden, 23-S-88 (23B Cosworth Mk XII) |
|
|
#105, in entry list |
|
|
|
|
|
|
| Cesare Toppetti (Giannini 987cc) |
|
|
|
#42, 6th |
|
|
|
|
|
| Squadra Tartaruga (Cosworth Mk III) |
|
|
|
|
#14, 79th |
|
|
#56, 22nd |
#121, 21st |
| OASC (Cosworth Mk IX) |
|
|
|
|
#15, 69th |
|
|
|
|
| OASC (Cosworth Mk IX) |
|
|
|
|
#28, in entry list |
|
|
#59, dnf |
|
| OASC (Cosworth Mk III) |
|
|
|
|
|
|
|
#54, 25th |
#128, 30th |
| OASC (Cosworth Mk XII) |
|
|
|
|
|
|
|
|
#142, dnf |
| Harry Zweifel (Maserati 2890cc) |
|
|
|
|
#22, dns |
|
|
|
#157, dns |
| Biennoise (23B Cosworth Mk XII) |
|
|
|
|
#24, in entry list |
|
#4, in entry list |
#62, 9th |
#140, 9th |
| Biennoise (Cosworth Mk IX) |
|
|
|
|
#25, 43rd |
|
|
|
|
| Biennoise, 23/S/75 (Cosworth Mk IX) |
|
|
|
|
#27, in entry list |
|
|
#61, 8th |
|
| Kurt Rost (23B Cosworth Mk XII) |
|
|
|
|
|
|
|
|
#141, 11th |
| Anton Fischhaber (BMW M10 1.8) |
|
|
|
|
|
|
|
#71, 6th |
#154, 8th |
| Karl Foitek (Cosworth Mk IX) |
|
|
|
|
#29, in entry list |
|
|
#63, 17th |
|
| Karl Foitek (23B Cosworth Mk XII) |
|
|
|
|
|
|
|
|
#139, 6th |
| Normand Team (23B Cosworth Mk XII) |
|
|
|
|
|
|
#6, 2nd |
|
|
| Normand Team (23B Cosworth 2.0) |
|
|
|
|
|
|
#8, 5th |
|
|
| Ian Walker/ Paul Hawkins (23B Cosworth Mk XII) |
|
|
|
|
|
|
#12, gear box |
|
|
| Bernhard Baur (Cosworth Mk IV) |
|
|
|
|
|
|
|
|
#131, 22nd |
|
Total point
40 |
|
|
|
5 |
|
|
15 |
10 |
10 |
| Statistics |
| Works Starts/finishes 24/19 |
|
|
|
1/1 |
4/3 |
|
3/2 |
7/6 |
9/7 |
| Drivers |
Team entries and car number |
| Duchess Auto Co |
| John Bentley |
+ |
|
|
|
|
|
|
|
|
| John Gordon |
+ |
|
|
|
|
|
|
|
|
| Lotus Sweden |
| Anders Josephson |
|
|
105 |
|
|
|
|
|
|
| Bjorn Atterberg |
|
|
105 |
|
|
|
|
|
|
| Squadra Tartaruga |
| Fritz Baumann |
|
|
|
|
14 |
|
|
56 |
121 |
| Kurt Rost |
|
|
|
|
14, 27 |
|
|
61 |
141 |
| OASC |
| Walter Schatz |
|
|
|
|
15 |
|
|
54 |
128 |
| Alban Scheiber |
|
|
|
|
28 |
|
|
59 |
142 |
| Biennoise |
| Robert Huber |
|
|
|
|
24 |
|
4 |
62 |
140 |
| Anton Fischhaber |
|
|
|
|
25 |
|
|
71 |
154 |
| Normand Team |
| Tony Hegbourne |
|
|
|
|
|
|
6 |
|
|
| Mike Beckwith |
|
|
|
|
|
|
8 |
|
|
Season races for Sports/Prototypes
| Car entry, chassis number |
Car number/ result |
|
Sebring |
Targa Florio |
Consuma |
Nurb |
Rossfeld |
Le Man |
Reims |
Freiburg |
Tourist Trophy |
Sierra Montagna |
Brigde Hampton |
Paris |
| Team |
12h |
|
Hill climb |
1000km |
Hill climb |
24h |
12h |
Hill climb |
|
Hill climb |
500km |
1000km |
|
| Cesare Toppetti, (Giannini 1.0) |
|
|
#340, 5th |
|
|
|
|
|
|
|
|
|
| Renzo Sinibaldi, (Giannini 1.0) |
|
|
#343, in entry list |
|
|
|
|
|
|
|
|
|
| Anton Fischhaber (BMW M10 1.8) |
|
|
|
|
#4, 10th |
|
|
#95, 13th |
|
#64, 11th |
|
|
| Harry Zweifel (Maserati 2.0) |
|
|
|
|
#6, dns |
|
|
|
|
|
|
|
| Karl Foitek (Climax BRM V8 2.0) |
|
|
|
|
#7, 4th |
|
|
#103, 11th |
|
|
|
|
| Karl Foitek (Mk XII) |
|
|
|
|
|
|
|
|
|
#55, 13th |
|
|
| Peter Westbury (23B BRM V8 1.9) |
|
|
|
|
#8, 5th |
|
|
|
|
#65, dnf |
|
|
| Kurt Rost, 23/S/75 |
|
|
|
|
#11, in entry list |
|
|
|
|
|
|
|
| OASC (Mk IV) |
|
|
|
|
#15, 18th |
|
|
|
|
|
|
|
| OASC (Mk III) |
|
|
|
|
|
|
|
#88, 19th |
|
#43, 18th |
|
|
| Biennoise (23B Mk XII) |
|
|
|
|
|
|
|
#104, 15th |
|
#53, in entry list |
|
|
| Harold Young (23B Mk XII) |
|
|
|
|
|
|
|
|
#6, clutch |
|
|
|
| Tartaruga (Mk III) |
|
|
|
|
|
|
|
|
|
#41, 44th |
|
|
| Roba (ATS 3.0class) |
|
|
|
|
|
|
|
|
|
#68, in entry list |
|
|
| G.R.T. Enterprises (Alfa Romeo 1.6) |
|
|
|
|
|
|
|
|
|
|
#43, in entry list |
|
|
Total points
20 |
|
|
6 |
|
14 |
|
|
|
|
|
|
|
| Statistics |
| Works Starts/finishes 16/13 |
|
|
1/1 |
|
5/4 |
|
|
4/4 |
1/0 |
5/4 |
|
|
| Drivers |
Team entries and car number |
| OASC |
| Walter Schatz |
|
|
|
|
15 |
|
|
88 |
|
43 |
|
|
| Peter Westbury |
| Peter Westbury |
|
|
|
|
8 |
|
|
|
|
|
|
|
| David Good |
|
|
|
|
|
|
|
|
|
65 |
|
|
| Biennoise |
| Robert Huber |
|
|
|
|
|
|
|
104 |
|
53 |
|
|
| Harold Young |
| David Hobbs |
|
|
|
|
|
|
|
|
6 |
|
|
|
| Tartaruga |
| Emil Knecht |
|
|
|
|
|
|
|
|
|
41 |
|
|
| Roba |
| Fritz Baumann |
|
|
|
|
|
|
|
|
|
68 |
|
|
| G.R.T. Enterprises |
| Mike Goth |
|
|
|
|
|
|
|
|
|
|
43 |
|
Season races for Sports
| Car entry, chassis number |
Car number/ result |
|
Dayt |
Sebring |
Monza |
Tourist trophy |
Targa Florio |
Spa |
Nurb |
Mugelo |
Rossfeld |
Le Man |
Reims |
Freiburg |
Ollon |
Bridgeh |
| Team |
2000km |
12h |
1000km |
|
|
500km |
1000km |
|
Hill climb |
24h |
12h |
Hill climb |
Hill climb |
500km |
|
| Chris M. M. Williams (BMW M10 2.0) |
|
|
|
#8, gear box |
|
|
|
|
|
|
|
|
|
|
| Lino Giacomini (Giannini 1.0) |
|
|
|
|
|
|
|
#42, in entry list |
|
|
|
|
|
|
| Massimo Natili/ "Terry" (Giannini 1.0) |
|
|
|
|
|
|
|
#43, 17th |
|
|
|
|
|
|
| Bruno Momigliano/ Remigio Cianfriglia (Giannini 1.0) |
|
|
|
|
|
|
|
#46, 20th |
|
|
|
|
|
|
| OASC (BRM 1950cc) |
|
|
|
|
|
|
|
|
#7, 14th |
|
|
#56, dns |
#173, 11th |
|
| OASC (Mk XII) |
|
|
|
|
|
|
|
|
|
|
|
|
#165, 9th |
|
| Endrik Fleischmann (BMW 2.0) |
|
|
|
|
|
|
|
|
#8, in entry list |
|
|
|
|
|
| Basilisk (DKW 842cc) |
|
|
|
|
|
|
|
|
#15, 28th |
|
|
#49, 16th |
#150, 35th |
|
| Biennoise (23B Mk XII) |
|
|
|
|
|
|
|
|
|
|
|
#53, 14th |
|
|
| Anton Fischhaber (BMW M10 2.0) |
|
|
|
|
|
|
|
|
|
|
|
#63, 16th |
|
|
| Pierre Marx (Mk XII) |
|
|
|
|
|
|
|
|
|
|
|
|
#163, 34th |
|
| George E. Alderman/ Dick Young (23B Mk XII) |
|
|
|
|
|
|
|
|
|
|
|
|
|
#25, 2nd |
| Candido Da Mota (Alfa Romeo 1.6) |
|
|
|
|
|
|
|
|
|
|
|
|
|
#42, 12th |
| Skip Barber (Porsche RSK 2.0) |
|
|
|
|
|
|
|
|
|
|
|
|
|
#16, dnf |
|
Total points
11 |
|
|
|
|
|
|
|
|
|
|
|
|
2 |
9 |
| Statistics |
| Works Starts/finishes 16/13 |
|
|
|
1/0 |
|
|
|
2/2 |
2/2 |
|
|
4/3 |
4/4 |
3/2 |
| Drivers |
Team entries and car number |
| OASC |
| Walter Schatz |
|
|
|
|
|
|
|
|
7 |
|
|
56 |
173 |
|
| Alban Scheiber |
|
|
|
|
|
|
|
|
|
|
|
|
165 |
|
| Basilisk |
| Heini Buess |
|
|
|
|
|
|
|
|
15 |
|
|
49 |
150 |
|
| Biennoise |
| Robert Huber |
|
|
|
|
|
|
|
|
|
|
|
53 |
|
|
Season
| Car entry, chassis number |
Car number/ result |
|
Dayt |
Sebring |
Monza |
Targa Florio |
Spa |
Nurb |
Le Man |
Mugelo |
CdE |
Hock |
Montagna |
Nurb |
Zeltweg |
| Team |
24h |
12h |
1000km |
|
1000km |
1000km |
24h |
|
|
|
Hill climb |
500km |
500km |
|
| Squadra Tartaruga (23B Mk XII) |
|
|
#42, in entry list |
|
|
#26, dns |
|
|
|
|
#36, 9th |
|
|
| Michel Weber/ Mario Cabral (BRM V8 2.0) |
|
|
|
|
#14, in enty list |
|
|
|
|
|
|
|
|
| Secondo Ridolfi/ Bruno Momigliano (Giannini 1.0) |
|
|
|
|
|
|
|
#165, OTL |
|
|
|
|
|
| Anton Fischhaber (BMW) |
|
|
|
|
|
|
|
|
|
#4, 7th |
|
|
|
| Bruno Frey (Mk XII) |
|
|
|
|
|
|
|
|
|
#35, in entry list |
#180, 35th |
|
|
| Bernoise (23B BMW) |
|
|
|
|
|
|
|
|
|
|
#194, 18th |
|
|
| Lions (Fiat-Abarth) |
|
|
|
|
|
|
|
|
|
|
#164, in entry list |
|
|
| Roland Sandi (Cat-Monark Crescent) |
|
|
|
|
|
|
|
|
|
|
#167, in entry list |
|
|
| J. Peter de Meritt (23B MK IV) |
|
|
|
|
|
|
|
|
|
|
#172, in entry list |
|
|
|
Total points
6 |
|
|
|
|
|
|
|
|
|
4 |
2 |
|
|
| Statistics |
| Works Starts/finishes 6/4 |
|
|
|
|
|
1/0 |
|
1/0 |
|
1/1 |
3/3 |
|
|
| Driver |
Team entries and car number |
| Squadra Tartaruga |
| Xavier Perrot |
|
|
42 |
|
|
26 |
|
|
|
|
36 |
|
|
| Emil Knecht |
|
|
42 |
|
|
|
|
|
|
|
|
|
|
| Peter Ettmüller |
|
|
|
|
|
26 |
|
|
|
|
|
|
|
| Lions |
| Charly Cuénoud |
|
|
|
|
|
|
|
|
|
|
164 |
|
|
| Bernoise |
| Eris Feldmann |
|
|
|
|
|
|
|
|
|
|
194 |
|
|
Season
| Car entry, chassis number |
Car number/ result |
|
Dayt |
Sebring |
Monza |
Spa |
Targa Florio |
Nurb |
Le Man |
Hock |
Mugelo |
Brands Hatch |
CdE |
Zeltweg |
Ollon |
Nurb |
| Team |
24h |
12h |
1000km |
1000km |
720km |
1000km |
24h |
304km |
529km |
6h |
300km |
500km |
Hill climb |
500km |
|
| Bruno Momigliano/ Gianluigi Picchi (Giannini 1.0) |
|
|
|
|
#146, dns |
|
|
|
|
|
|
|
|
|
| J. Peter de Meritt/ Jean Blanc (MK III) |
|
|
|
|
|
|
|
|
#38, dnf |
|
|
|
|
|
| Squadra Tartaruga (Mk XII) |
|
|
|
|
|
|
|
|
|
|
|
|
#51, dnf |
|
| Leman (23C) |
|
|
|
|
|
|
|
|
|
|
|
|
#203, 32nd |
|
| Lions (Fiat-Abarth) |
|
|
|
|
|
|
|
|
|
|
|
|
#185, in entry list |
|
|
| Statistics |
| Works Starts/finishes 4/1 |
|
|
|
|
1/0 |
|
|
|
1/0 |
|
|
|
2/1 |
|
| Driver |
Team entries and car number |
| Squadra Tartaruga |
| Xavier Perrot |
|
|
|
|
|
|
|
|
|
|
|
|
51 |
|
| Leman |
| Henri Bürgisser |
|
|
|
|
|
|
|
|
|
|
|
|
203 |
|
| Lions |
| Charly Cuénoud |
|
|
|
|
|
|
|
|
|
|
|
|
185 |
|
Season
| Car entry |
Car number/ result |
|
Dayt |
Sebring |
Brands Hatch |
Monza |
Targa Florio |
Nurb |
Spa |
Watkins Glen |
Zeltweg |
Le Man |
| Team |
24h |
12h |
6h |
1000km |
|
1000km |
1000km |
6h |
500km |
24h |
|
| Racing Preparations (23B Mk XII) |
|
|
|
#22, in entry list |
|
|
|
|
|
|
|
| Statistics |
| Starts/finishes 0/0 |
|
|
|
|
|
|
|
|
|
|
| Driver |
Team entries and car number |
| Racing Preparations |
| John Markey |
|
|
|
22 |
|
|
|
|
|
|
| Tony Beeson |
|
|
|
22 |
|
|
|
|
|
|
Source
Source
Source
Drawings
Source
Source
Chassis
Source
