1969 Mustang Engine Information – Thriftpower Inline 6 (250 cubic inch)
Introduced in 1969, the 155 horsepower 6 cylinder was needed because of the Mustang’s increase in size. The 200 cubic inch six although still offered was way underpowered to handle the new Mustang. However, in my opinion, to really power a Mustang always required an 8 cylinder engine and buying a 6 (or 4 cylinder in later years) was like buying 3/4 or 1/2 an engine. But you didn’t get a discount from the dealer for the part of the engine they forgot to install.
Engine Basics
| Year |
1969 |
| Cylinders |
6 |
| Displacement |
250 cu / 4.1 liters |
| Power (hp) |
120 hp @ 4,400 RPM |
| Torque (lb/ft) |
190 lb/ft @ 2,400 RPM |
| Compression |
8.1:1 |
| Bore x Stroke |
3.682 x 3.910 |
Engine Specs (250 cid inline 6)
| Spark Plugs |
|
| Oil filter |
|
| Gas Filter |
|
| Air Filter |
|
| PCV |
|
| Oil Pressure |
35 – 55 PSI |
| Points |
Gap and Dwell at xxx RPM |
| Timing |
6 Degrees BTDC Manual & 12 Degrees BTDC Automatic |
| Valve adjustment |
|
| Valve size |
|
| Valve arrangement |
E I E I E E I E I I E Front to rear |
| Manifold Vacuum |
17 inches at idle |
| Warm Idle Manual Trans |
575-600 RPM |
| Warm Idle Auto Trans |
500-525 RPM |
| Carburetor CFM |
|
| Bore and stroke |
3.500 X 2.940 |
| Compression |
9.1:1 (155 – 199 psi @ cranking speed) |
| HP and Torque |
101 hp at 4400 RPM and 158 ft/lbs torque at 2400 RPM |
| Taxable HP |
29.4 |
| Distributor Rotation |
Counter-Clockwise |
| Firing order |
1 – 5 – 3 – 6 – 2 – 4 |
Clutch information: for the 3 spd, 9″ diam. 6 Springs, Pressure plate orange cover, purple springs, aluminum stripe. Disc is 9″ diameter, 6 springs, Blue with blue springs.
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