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Ford Nano specs: 183 ci (3.0L) 6-cylinder, 3.358 x 3.386 in (85.3 x 86 mm) bore and stroke, 10.5:1 compression. Rated 400 hp. Rod ratio and piston speed.
The Ford Nano is close to square: 3.3583" bore against 3.3858" stroke, within 0.8%, which splits the difference between a high-revving layout and a torque layout. The 3.3858" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.5 ci (500 cc).
10.5:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 24 engines in the EcoBoost family, sitting between the 61 ci and 213.4 ci members. Factory fitments include the Lincoln Continental, Lincoln MKZ, Ford Explorer ST and 1 other.
| Displacement | 183 ci / 3 L |
|---|---|
| Bore | 3.3583" |
| Stroke | 3.3858" |
| Cylinders | 6 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 0.992 |
| Block material | compacted graphite iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 400 hp |
| Bore/stroke character | 0.992 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,386 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.5 ci |
| Static compression | 10.5:1 — in the range that usually runs on pump premium |
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