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Typically, these rare GTs were powered by the Olds 425 or 455 cubic inch (7.5 litre) engine. One of these models was outfitted with a highly tuned, Chevrolet big-block 454 cubic inch engine and was tested by Car and Driver and broke the 200 mph barrier. Thus, becoming the world's fastest street-legal sports car in 1977.
1968 and 1969 400s shared the Olds big-block standard 4.25 in (107.95 mm) stroke with the 455 but used a undersquare 3.87 in (98.30 mm) bore to comply with GM's maximum 400 cu. in. displacement restrictions in the A-body cars while also reducing tooling costs. Displacement is similar to the earlier engine, at 399.9 cu in (6,554 cc).
Being nearly identical, it too has the distinctive odd-sided hexagonal shape. These engines can be fitted in rear wheel drive vehicles with the right bellhousing and are used in hot rods, kit cars, sand rails and late model engine swaps. All Cadillac Northstar V8s; Oldsmobile Aurora L47 V8; GM 3.5L LX5 "Short Star" V6
This car was also called the Miller-Hanson Special in recognition of George Hanson, who had fronted the $1800 needed to build the car. The engine for the Miller-Hanson special was an Oldsmobile, modified to displace 6,883 cubic centimetres (420 cubic inches) and fitted with four Rochester carburetors mounted on a drag racing intake manifold.
The American automobile manufacturer General Motors sold a number of vehicles under its marque Oldsmobile, which started out as an independent company in 1897 and was eventually shut down due to a lack of profitability in 2004. [1]
However, the engine used in these Trans Ams was the same regular production 455 taken from the big body cars Pontiac was producing, and output 200 HP with a torque rating of 330 lb⋅ft at 2,000 rpm. [17] The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission.
The 2024 Ford Mustang is now available with a new supercharger kit courtesy of Ford Performance. With the regular 5.0-liter V-8, Ford claims the kit will raise horsepower from 480 to up to 810 ...
The Hurst/Olds was the only GM intermediate-sized car to offer an engine larger than 400 cu in (6.6 L) thanks to a corporate policy at that time which prohibited the divisions from putting larger engines in cars smaller than full-sized models other than the Chevrolet Corvette. Oldsmobile got around the 400 cubic-inch limit by implying that the ...