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Toyota 3S-GTE specs: 2.0L (122 ci) 4-cylinder, 86 x 86 mm (3.3858 x 3.3858 in) bore and stroke. Rated 190-200 hp, 1988–1995. Used in the Toyota Celica.
The Toyota 3S-GTE is exactly square — 3.3858" bore and 3.3858" stroke are the same — 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 4 cylinders displaces 30.5 ci (500 cc).
It is one of 6 engines in the Toyota 122ci family, all of them 122 ci — the differences between them are in compression, heads and rating, not displacement. 8 factory variants share these dimensions, rated from 190 to 200 hp across 1988–1995.
| Displacement | 122 ci / 2 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.3858" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 8.5–8.8:1 (published figures vary) |
| Bore/stroke ratio | 1 |
| Fuel type | gas |
|---|---|
| Advertised HP | 190–200 hp |
| Years | 1988–1995 |
| Piston-to-wall clearance (factory service manual spec, Gen 1 ST165 (1986-89)) | 0.0012–0.0020" |
|---|---|
| Piston-to-wall clearance (factory service manual spec, Gen 2 (1990-93; 1991 RM266E)) | 0.0028–0.0035" |
| Piston-to-wall clearance (factory service manual spec, Gen 3 ST205 (1994-99; RM398E)) | 0.0008–0.0016" |
| Ring end gap (factory service manual spec, Gen 1 ST165) | top 0.013–0.022", second 0.018–0.027", oil 0.008–0.024" |
| Ring end gap (factory service manual spec, Gen 2, with catalyst (w/ TWC)) | top 0.013–0.022", second 0.018–0.026", oil 0.008–0.024" |
| Ring end gap (factory service manual spec, Gen 2, without catalyst (w/o TWC markets); top ring same as w/ TWC) | top 0.013–0.022", second 0.008–0.017", oil 0.012–0.039" |
| Ring end gap (factory service manual spec, Gen 3 ST205) | top 0.013–0.022", second 0.018–0.026", oil 0.006–0.020" |
| Bore/stroke character | 1.000 — 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 |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1988 | 190 hp | 3S-GTE |
| 1989 | 190 hp | 3S-GTE |
| 1990 | 200 hp | 3S-GTE |
| 1991 | 200 hp | 3S-GTE |
| 1992 | 200 hp | 3S-GTE |
| 1993 | 200 hp | 3S-GTE |
| 1994 | 200 hp | 3S-GTE |
| 1995 | 200 hp | 3S-GTE |
2 factory vehicles, 1988–1995. Each year opens that model's engine table.