Testastretta engine
The Testastretta engine from the Italian motorcycle manufacturer Ducati is a water-cooled 90 ° V2 engine (called "L-Twin" by Ducati because of its forward-sloping installation position ), each with two overhead camshafts driven by toothed belts .
The Testastretta engines have a displacement of 748, 749, 821, 937, 998, 999, 1099 and 1198 cm³ and four desmodromic valves per cylinder. Testastretta can be roughly translated as "narrow head". This indicates a narrow cylinder head , but not the head itself is narrow, but the angle between the inlet and outlet valves, which is 25 degrees. This results in a compact and efficient combustion chamber. Ducati developed special flat pistons for this engine. With these measures, a very effective linear flame front is achieved during combustion. A better filling of the cylinders can also be achieved, which has a positive effect on combustion and thus on power output and efficiency. The Testastretta engine therefore has a higher peak output than the previous Desmoquattros .
In 2006, the “Testastretta Evoluzione” engine was used for the first time in the Ducati 1098 Superbike , with a displacement increased to 1099 cm³, among other things. With the introduction of the Ducati 1098 R , the displacement was further increased to 1198 cm³. Ducati consequently changed the model name to Ducati 1198 . This displacement variant was later also available in the cheaper models. In autumn 2009 Ducati presented the new Multistrada 1200, which is powered by a specially revised Testastretta Evoluzione , also with 1198 cm³. The 1099 cm³ variant is still used in the Ducati Streetfighter model .
In 2013 Ducati used the Testaretta with 821 cm³ and water cooling in the Hypermotard and Hypermotard SP and in
2016 the Testaretta 11 ° with 937 cm³ in the Hypermotorad 939 and the Ducati SuperSport 939 .
Technical specifications
The values correspond to the last or current expansion stage.
| Testastretta (Monster S4R / S4Rs) | Testastretta (937)
SuperSport |
Testastretta (999) | Testastretta (999s) | Testastretta (999R) | Testastretta Evoluzione (1098) | |
|---|---|---|---|---|---|---|
| design type | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic | 11 °: liquid-cooled two - cylinder in L-shape, 4 valves per cylinder, desmodromic controlled | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic, titanium connecting rods | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic, titanium connecting rods | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic |
| Mixture preparation | Manifold injection | |||||
| compression | 11.4: 1 | 12.6 ± 0.5: 1 | 11.4: 1 | 11.4: 1 | 12.5: 1 | 12.5: 1 |
| Bore / stroke | 100.0 x 63.5 mm | 94 × 67.5 mm | 100.0 x 63.5 mm | 100.0 x 63.5 mm | 104.0 x 58.8 mm | 104.0 x 64.7 mm |
| Displacement | 998 cc | 937 cc | 998 cc | 998 cc | 999 cm³ | 1099 cc |
| rated capacity | 95.7 kW (130 PS) at 9500 rpm | 81 kW (110 PS) at 9000 rpm | 102.9 kW (140 PS) at 9750 rpm | 105.2 kW (143 hp) at 9750 rpm | 110.0 kW (150 PS) at 9750 rpm | 119.3 kW (160 PS) at 9750 rpm |
| Max. Torque | 103.9 Nm at 7500 rpm | 93 Nm at 6500 rpm | 108.9 Nm at 8000 rpm | 111.8 Nm at 8000 rpm | 116.7 Nm at 8000 rpm | 122.6 Nm at 8000 rpm |
| Testastretta (749) | Testastretta (749s) | Testastretta (749R) | |
|---|---|---|---|
| design type | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic | 90 ° V-two-cylinder, 4-stroke, water cooling , DOHC , 8 valves, desmodromic, titanium connecting rods |
| Mixture preparation | Manifold injection | ||
| compression | 11.7: 1 | 12.3: 1 | 12.7: 1 |
| Bore / stroke | 90.0 x 58.8 mm | 90.0 x 58.8 mm | 94.0 x 54.0 mm |
| Displacement | 748 cc | 748 cc | 749 cc |
| rated capacity | 79.5 kW (108 hp) at 10,000 rpm | 85.4 kW (116 hp) at 10,000 rpm | 89.1 kW (121 hp) at 10,500 rpm |
| Max. Torque | 80.4 Nm at 8500 rpm | 82.4 Nm at 8500 rpm | 82.4 Nm at 8500 rpm |