|
S4C |
S4D |
S6D |
| Approx. number built |
250 |
50 |
12 |
| Years of manufacture |
1934-38 |
1937-38 |
1935-46 |
| Wheelbase |
9´2" |
9´4.25" |
9´4.25" |
| Track front/rear |
4´3" / 4´3" |
4´3.25" / 4´4.5" |
4´3.25" / 4´4.5" |
| Capacity, no of cylinders |
1466 cc, 4 |
1597 cc, 4 |
2599 cc, 6 |
| Bore x Stroke (mm) |
69 x 98 |
72 x 98 |
75 x 98 |
| Firing order |
1-3-4-2 |
1-3-4-2 |
1-4-2-6-3-5 |
| BHP at revs/min |
55 (70) at 4500 |
65 at 4500 |
90 at 4500 |
| Compression ratio |
6:1 (6.5:1) |
6:1 |
6:1 |
| Inlet camshaft no |
13010 |
13010 |
BS1273 |
| Inlets close |
120 mm; 47o aft. B.D.C |
47o aft. B.D.C |
71o aft. B.D.C |
| Inlet tappet clearance |
0.004" |
0.004" |
0.004" |
| Exhaust camshaft no |
13009 |
13009 |
BS1272 |
| Exhausts open |
125 mm; 49o bef. B.D.C |
49o7´ bef. B.D.C |
68o24´ bef. B.D.C |
| Exhaust tappet clearance |
0.006" |
0.006" |
0.006" |
| Original carburetor's) |
Solex 30 BFHD (Solex 35 BFHD or 2x30 BDHD or 2x11/4" SU´s) |
Solex 35 BFHD |
2x11/4" SU´s |
| Replacement Solex carb. |
30 AHD |
35 ´HBFD |
|
| Fuel feed |
S.U. electric pump |
S.U. electric pump |
S.U. electric pump |
| Petrol tank capacity |
10 gallons |
11 gallons |
14 - 15 gallons |
| Petrol consumption |
30 m.p.g.(25/30 m.p.g.) |
30 m.p.g. |
22 m.p.g. |
| Number of main bearings |
3 |
3 |
4 |
| Oil pressure |
40 p.s.i. (60 p.s.i.) |
40 p.s.i. |
40 p.s.i. |
| Sump capacity |
10 pints |
10 pints |
14 pints |
| Gearbox capacity |
2½ pints |
2½ pints |
3 pints |
| Back axle capacity |
2½ pints |
3 pints |
3 pints |
| H.T. supply |
Scintilla Vertex / 12 V coil |
Scintilla Vtx / 12 V coil |
Scintilla Vtx / 12 V coil |
| Distributor |
Lucas DK4A |
Lucas DK4A |
Lucas DU6A |
| Contact breaker gap |
0.015" |
0.015" |
0.015" |
| Sparking plugs |
18mm K.L.G K.SS.I (K.L.G. B.I.) |
18mm K.L.G. B.I. |
18mm K.L.G. B.I. |
| Sparking plug gap |
0.018" |
0.018" |
0.018" |
| Earthing pole |
Negative |
Positive |
Positive |
| Starter/(Dynamotor) |
Rotax DM 11/4 Dynamotor |
Lucas M418A |
Lucas M418A |
| Dynamo |
|
Lucas CH5 |
Lucas CH5 |
| Clutch |
Borg and Beck 8" |
Borg and Beck 9" |
Borg and Beck 9" |
| Brakes |
Bendix 10" |
Lockheed 12" |
Lockheed 12" |
| Steering type / oil |
Marles Weller - SAE140 |
Rack & Pinion - grease |
Rack & Pinion - grease |
| Front suspension /shock abs. |
Semi elliptic - Hartford |
Independent - wooden rings |
Independent - wooden rings |
| Rear suspension /shock abs. |
Quarter elliptic - Hartford |
Quarter elliptic - Luvax vane |
Quarter elliptic - Luvax vane |
| Road wheels |
Rudge Whitworth wire knock on |
Jordan pressed steel knock on |
Jordan pressed steel knock on |
| Tires |
500 x 18 |
6.25 x 16 |
6.25 x 16 |
| Pressure front/rear lbs./in |
26 / 26 |
18 / 20 |
18 / 20 |
| Toe-in setting |
1/8" - 3/16" |
2mm each side |
2mm each side |
The British Salmson cars were designed by engineers and manufactured by craftsmen trained for the quality standards required for the production of aero engines. A 2 years guarantee were given on the cars when new. This was exceptionally good in those days when the cars were new.
 S4C 12/70 Engine with direct coupled Rotax Dynamotor
Twin Overhead Camshafts with adjustable vertical shaft drive
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