Filthy Forty

Filthy Forty

Category	Gasser
Designer(s)	Charlie Hill’
Predecessor	none
Successor	The next car built by Charlie hill would be a Chevrolet Corvette (C3)
Technical specifications [1]
Chassis	1940 Willys
Length	170.1 inches (4,320 mm)
Width	56.9 inches (1,445.3 mm)
Height	58.25 inches (1,479.5 mm)
Axle track	39.6 inches (1,005.8 mm) (Front) 57.5 inches (1,460.5 mm) (Rear)
Wheelbase	104.0 inches (2,642 mm)
Engine	Turbo Fire Small Block 4,638 cubic centimetres (283.0 cu in) V8 NA Front Engine, RWD
Transmission	BorgWarner 4-speed (6.58 ratio) Manual transmission
Power	435 brake horsepower (441.0 PS; 324.4 kW) @ 9,500 rpm 440 pound-feet (596.6 N⋅m) @ 5,300 rpm
Weight	1,731 pounds (785.2 kg)
Tires	Goodyear
Competition history
Notable drivers	Charlie Hill
Entries Races Wins F/Laps Titles 60 60 46 1 (1964) 3

The Filthy Forty is a gasser from the early 1960s. ^[2]

Filthy Forty is a Chevrolet 283-powered 1940 Willys entered by the team of Hill & Zartman. It won the NHRA C/G national title at the 1963 Nationals, at Indianapolis Raceway Park, with a pass of 12.70 seconds at 110.42 mph (177.70 km/h), ^[3] and would win the 1964 Nationals with a pass at 11.95 seconds at 116.82 mph (188.00 km/h). The car would end up sold to a racing team in Wisconsin, where it would be destroyed in a crash in 1965. ^[4]

The Chevrolet 283 V8 used in the car would be modified with JE Pistons, Crane Engineering Headers and a Isky Racing Camshaft. The engine would run a Compression ratio of 14:1, and a maximum Horsepower and RPM up from 310 bhp (314.3 PS; 231.2 kW) @ 5,500 rpm to 435 bhp (441.0 PS; 324.4 kW) @ 9,500 rpm. The engine would be fit to a BorgWarner 4-speed, with a 6.58 Gear Ratio. The new Small-Block engine, significantly larger than the 2,199 cc (134.2 cu in; 2.2 L) Go-Devil I4, would mean that even with the significant weight reduction, it would only lose around 385 lb (174.6 kg) from the standard Willys.

Notes

1. "Historical Tech - The Filthy Forty of Charlie Hill!". The H.A.M.B. Retrieved 2025-02-19.
2. Davis, Larry. Gasser Wars (Cartech, 2003), pp.180-8.
3. Davis, p. 183.
4. "Historical Tech - The Filthy Forty of Charlie Hill!". The H.A.M.B. Retrieved 2025-02-19.

Sources

• Davis, Larry. Gasser Wars, North Branch, MN: Cartech, 2003, pp. 180–188.