1958-1959 DeSoto Firesweep I Station Wagon (facelift ) Explorer 5.9 V8 (295 Hp)

The DeSoto Firesweep I Station Wagon, specifically the 1959 facelifted model equipped with the Explorer 5.9 V8 engine producing 295 horsepower, represents a significant, though ultimately short-lived, chapter in the American automotive landscape. Produced for the 1958 and 1959 model years, the Firesweep was DeSoto’s entry into the burgeoning full-size station wagon market. It was built on the Chrysler corporation’s A-body platform, shared with Dodge and Plymouth models, and aimed to offer a blend of family practicality and American styling of the late 1950s. The Explorer 5.9 V8 variant was positioned as a mid-to-high range offering within the Firesweep lineup, providing a substantial power upgrade over the base engine options.

Technical Specifications

Powertrain & Engine Architecture

The heart of this Firesweep variant was the DeSoto Explorer 5.9 V8 engine. This engine, part of the Chrysler “wedge” family, featured a 90-degree V8 configuration with overhead valve (OHV) operation. It displaced 5.9 liters (361 cubic inches) and utilized a cast iron block and cylinder heads. The engine was equipped with a single Carter carburetor, providing fuel delivery. While not boasting the sophistication of fuel injection, the carburetor proved reliable for the era. The 295 horsepower output was achieved through a relatively high 10:1 compression ratio and a four-barrel carburetor. The engine’s torque peak of 529 Nm (390 lb-ft) at 2400 rpm provided ample pulling power for a full-size station wagon. The transmission was a three-speed manual, a common offering for the time, though a TorqueFlite automatic transmission was also available as an option.

Driving Characteristics

The 1959 Firesweep with the 5.9 V8 and manual transmission offered a distinctly American driving experience. Acceleration was brisk for the period, allowing for confident merging and passing maneuvers. The manual transmission, while providing driver control, wasn’t known for its precise shift feel. The gear ratios were geared towards providing strong low-end torque, making it suitable for hauling passengers and cargo. Compared to the base engine options, the Explorer 5.9 V8 provided a noticeable performance boost. However, it didn’t match the outright performance of some of the larger displacement V8s offered by Chrysler and other manufacturers. The leaf spring rear suspension provided a comfortable ride, but it wasn’t particularly sporty, exhibiting some body roll in corners.

Equipment & Trim Levels

The Firesweep I Station Wagon, in its 1959 facelifted form, offered a reasonable level of standard equipment for the time. The Explorer 5.9 V8 trim typically included features such as full wheel covers, bright exterior trim, and a more upscale interior. The interior featured cloth and vinyl upholstery, with a focus on durability and practicality. A three-spoke steering wheel and basic instrumentation were standard. Optional extras included power steering, power brakes, a radio, and air conditioning. The nine-passenger seating configuration was a key selling point for families. The dashboard layout was typical of the late 1950s, with a wide, horizontal design and prominent chrome accents.

Chassis & Braking

The Firesweep I Station Wagon utilized a body-on-frame construction, common for American cars of the era. The front suspension featured independent torsion bars and a double wishbone setup, providing a relatively comfortable ride. The rear suspension employed leaf springs, which were robust and capable of handling heavy loads. Braking was accomplished via drum brakes on all four wheels. While adequate for the time, the drum brakes lacked the stopping power and fade resistance of disc brakes. Steering was handled by a worm-reduction unit, which provided a somewhat indirect steering feel. The chassis was designed to provide a balance between ride comfort and load-carrying capacity.

Market Reception & Comparison

The 1959 DeSoto Firesweep faced stiff competition from other full-size station wagons offered by Ford, Chevrolet, and Plymouth. Critics generally praised the Firesweep’s styling and spacious interior, but some noted its relatively high price compared to competitors. The Explorer 5.9 V8 engine was well-regarded for its power and torque, but its fuel economy was typical for the era – relatively poor by modern standards. Compared to the base engine options, the 5.9 V8 offered a significant performance improvement, but it came at a higher cost. The Firesweep’s reliability was generally considered average for the time, with some owners reporting issues with the carburetor and electrical system.

Legacy

The DeSoto Firesweep, and the DeSoto brand as a whole, was discontinued after the 1961 model year. The Firesweep I Station Wagon, particularly the 1959 facelifted model with the Explorer 5.9 V8, is now a sought-after classic car among collectors. The engine, while not particularly advanced, is known for its durability and relative simplicity. Parts availability can be a challenge, but a dedicated community of DeSoto enthusiasts exists to support restoration efforts. Today, these vehicles represent a nostalgic reminder of the American automotive industry’s golden age, and a testament to the styling and engineering of the late 1950s. The 5.9 V8, while not a high-performance engine by today’s standards, provides a unique and enjoyable driving experience for those who appreciate classic American iron.