Generation 4 (NASCAR)
The Generation 4 car was the NASCAR vehicle generation used from 1992 to 2007 full-time in the NASCAR Cup Series, in the Busch/Nationwide Series until 2010, and in the ARCA Racing Series until 2017. The generation has been described as the generation that removed all "stock" aspects from stock car racing and was as aerodynamically sensitive as a Le Mans Prototype.
Rusty Wallace's 1994 Ford Thunderbird at Michigan International Speedway | |
| Constructor | Chevrolet Ford Pontiac (until 2003) Dodge (2001-2007) Toyota (selected 2007 races) |
|---|---|
| Predecessor | Generation 3 |
| Successor | Car of Tomorrow |
| Technical specifications | |
| Wheelbase | 110 in (279.4 cm) |
| Engine | 90° pushrod V-8 358 cubic inches (5,870 cc) |
| Fuel | Unocal 76 110 (1992-2003) Sunoco Supreme 112 (2004-2007) |
| Tires | Goodyear Hoosier (1994) |
| Competition history | |
| Debut | February 16, 1992 (1992 Daytona 500) |
| Last event | November 18, 2007 (2007 Ford 400) |
Generation 4 cars feature highly modified bodies with teams spending hours in the wind tunnel to gain aerodynamics. The bumpers, nose and tail are composed of molded fiberglass based on production counterparts. In the 2000s teams began using different RPM levels on their engines making each team and manufacturer sound different.
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