The Mercedes-Benz Indy V8 engine, known as the Ilmor 265-D (1994),[5] and later the Mercedes-Benz IC108 (1995-2000), is a powerful, turbocharged, 2.65-liter, Indy car racing V-8 engine, specially designed, developed, and built by Ilmor, in partnership and collaboration with Mercedes-Benz, to compete in the CART series; between 1994 and 2000.
| Ilmor 265-D (1994)[1] Mercedes-Benz IC108 (1995-2000) | |
|---|---|
| Overview | |
| Manufacturer | Ilmor-Mercedes |
| Production | 1994-2000 |
| Layout | |
| Configuration | 72°-82°[2] V-8 |
| Displacement | 2.65 L (161.7 cu in) |
| Cylinder bore | 91 mm (3.6 in) |
| Piston stroke | 50.9 mm (2.0 in) |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Valvetrain | 16-valve to 32-valve, OHV/DOHC,[3] two-valves per cylinder to four-valves per cylinder |
| Compression ratio | 12.4:1 |
| Combustion | |
| Turbocharger | Garrett single-turbo |
| Fuel system | Electronic fuel injection |
| Fuel type | Methanol |
| Oil system | Dry sump |
| Cooling system | Liquid cooling |
| Output | |
| Power output | 800–1,000 hp (597–746 kW) |
| Torque output | 345–540 lb⋅ft (468–732 N⋅m) |
| Dimensions | |
| Dry weight | 95–123 kg (209–271 lb)[4] |
| Chronology | |
| Predecessor | Mercedes-Benz 500I engine |
Background
editThe 265-D engine was introduced for the 1994 season, which replaced the 265-C, although some of the smaller teams still ran the "C" throughout 1994. Without badging support, the engines were referred to simply as the "Ilmor-C" and the "Ilmor-D". This engine was said to produce about 30 hp (22 kW) more than the Ford-Cosworth XB used at the time.[6]
In 1995, Mercedes-Benz became the badging manufacturer for the Ilmor Indy car engines. The engine continued to be a strong contender on the CART circuit. In 1996, the open-wheel "split" began between CART and the IRL. Ilmor primarily was a provider for CART-based teams, and did not provide engines for any full-time IRL teams. At the 1996 Indy 500, the Ilmor Mercedes-Benz D was used by Galles Racing, and finished second, the powerplant's one and only start in an IRL-sanctioned race. When the IRL switched to normally-aspirated engines for 1997, the 265s were no longer permitted in the IRL and the Indy 500, and from that point on raced in the CART series exclusively.
Applications
editReferences
edit- ^ "8W - What? - Penske-Mercedes PC23 500i". 8w.forix.com.
- ^ "Review: 'Beast' Recalls Drama Of Designing Legendary Race Engine". EngineLabs. October 8, 2014.
- ^ "Unintended consequences: The backstory Of Indy's most remarkable engine". May 15, 2020.
- ^ "engine weights". www.gomog.com.
- ^ "Mercedes Indy Engine". Speedway Motors Museum of American Speed.
- ^ Bennett, Nigel (October 15, 2013). Inspired to Design: – F1 cars, Indycars & racing tyres: the autobiography of Nigel Bennett. Veloce Publishing Ltd. ISBN 9781845845360 – via Google Books.
- ^ "1994 Penske PC23 - Spec Sheet | The Dawn Treader Customer Portal". customers.dtperformanceltd.co.uk.
- ^ Bennett, Nigel (15 October 2013). Inspired to Design: – F1 cars, Indycars & racing tyres: the autobiography of Nigel Bennett. Veloce Publishing Ltd. ISBN 9781845845360. Retrieved 8 November 2021 – via Google Books.
- ^ Magazines, Hearst (8 June 1995). "Popular Mechanics". Hearst Magazines. Retrieved 8 November 2021 – via Google Books.
- ^ Bentley, Karen; Gluck, Jeff (4 June 2015). The Unsers. Infobase Learning. ISBN 9781438142678. Retrieved 8 November 2021 – via Google Books.
- ^ Magazines, Hearst (8 June 1996). "Popular Mechanics". Hearst Magazines. Retrieved 8 November 2021 – via Google Books.
- ^ Bennett, Nigel (15 October 2013). Inspired to Design: – F1 cars, Indycars & racing tyres: the autobiography of Nigel Bennett. Veloce Publishing Ltd. ISBN 9781845845360. Retrieved 8 November 2021 – via Google Books.
- ^ "1997 Penske PC26 Mercedes Specifications". Ultimatecarpage.com.
- ^ "Penske PC-27 Mercedes-Benz 1998". GTPlanet. 29 March 2017.
- ^ "MARCH 86C : 1987 INDIANAPOLIS 500 WINNER : AL UNSER SR". Pensjeautomall.com. Retrieved 8 November 2021.