1958 Buick Fact Sheet

1958 Buick Facts, Figures, and Specifications

Five Fast Facts You May Not Know

1958 Buick Limited Convertible

1958 Buick Century Hardtop

1. Century, Super, Roadmaster & Limited Get Aluminum Brake Drums

2. New Limited Series Sits Above Roadmaster

3. Triple Turbine Transmission Arrives

4. Special V-8 Gets Senior Series Cam with Dynaflow

5. Air Ride Suspension Offered

1958 – Baroque Styling and a New Top Line

A bulky, more heavily chromed styling adorned the 1958 models. New Lucite paints were used in many colors with metallic paints called “Mist” prominent. For the first time since 1948, there were no distinguishing Ventiports on Buick front fenders. The “Limited” now sat above the Roadmaster, as a gap-bridging Series between Buick and Cadillac.

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1958 Buick Facts – Body Paint Color Codes

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1958 Buick

  Green Mist
  Blue Mist
  Laurel Mist
  Silver Mist
  Polar Mist
  Gold Mist
  Carlsbad Black
  Sylvan Gray
  Glacier White
  Hunter Green
  Spray Green
  Colonial Blue
  Warwick Blue
  Dark Turquoise
  Light Turquoise
  Antique Ivory
  Casino Cream
  Seminole Red
  Garnet Red
  Reef Coral
  Desert Beige
  Cobalt Blue
  Desert Sage
  Mojave Yellow
  Canyon Cedar

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1958 Buick Facts and Specifications

General Year Information – 1958 Buick Facts

For the first time since 1948, there were no distinguishing Ventiports on Buick’s front fenders. The new “drawer-pull” grille, made up of rectangular chrome squares, was used. Four headlamps were standard. New brakes featured cast-iron liners inside aluminum drums. New Lucite paints were used in many colors.

Limited
The Buick Limited name was revived as a single-year halo car for the Division. It used the Cadillac Series 60 extended deck to add more size over the Roadmaster.  In comparison to the other models in the Buick lineup, the GM C platform-based Limited was slightly more restrained than the Special, Century, Super and Roadmaster. Instead of a chromed side panel trim, it got a body color-keyed insert decorated with fifteen slanted hash marks (three groups of five). The Limited also received its own rear tail treatment that traded the heavy chrome tail light housings for a wraparound tail light lens broken up by four chrome bands. The rear bumper housed “Dual Jet” back-up lights. In the front, it received the aggressive Fashion-Aire Dynastar grille, cast of 160 chrome squares. Front finned-aluminum power brakes and the the new Flight Pitch Dynaflow were standard.

The Limited was only available as a 4-door hardtop, 2-door hardtop coupe or convertible It sat on Buick’s 127.5 inch wheelbase, with an overall length of 227.1 inches. Interiors were of high quality fabrics in sedans and coupes, and full leather in convertibles.

Buick sold only 7,438 Limited models, due in part to their price and proximity to the Cadillac Series 62 that it was designed to act as a bridge between that car and the Roadmaster. However, the Limited’s four-door hardtop sedan started at a base price of $5,112, which was $221 higher than Cadillac’s entry-level Series 62 four-door hardtop sedan at $4,891. This mistake likely cost Buick sales.

Roadmaster
In 1958, the Roadmaster was now available as the well-equipped “75” model Like all ’58 Buicks, the body was styled to appear bulkier and was more heavily chromed. Buick’s new “drawer pull” grille was used – called “Fashion-Aire Dynastar”. It was made up of rectangular chrome squares. For the first time since 1948, there were no Ventiports on the front fenders. On the rear deck, the Roadmaster name was spelled out in block lettering beneath a Buick emblem housing the trunk lock keyway. Wheelhouses had bright moldings, rocker panels had an ebbed molding, and a large rear fender bright flash with ribbed inserts replaced the previous year’s chromed rear fender lower panel. It was later determined that the styling did not resonate with buyers and Sales fell further to 14,000.

Super
The once most popular Buick line was reduced to two body styles for 1958 with the elimination of the convertible. Side trim was similar to Series 40, except for the “Super” on the rear fender flashes. Super models remained longer than the Series 40 Specials and Series 60 Centurys, utilizing the 127.5 inch wheelbase. Standard equipment included Variable-Pitch Dynaflow, power steering, power brakes, a safety-cushion instrument panel bumper guards. A Custom interior was available at extra cost. Styling also hampered the Super with sales falling to 42,388, the lowest since the wartime 1942 model year

Century
The Century shared the Special’s sheetmetal and had the same excessive brightwork. It still utilized the high compression 364 CID V-8 with 4-barrel carburetion, but did not offer manual transmission or an optional high performance rear axle. As in 1957, the image of Century was reduced to that of a short-wheelbase Super Series. Identification was set with Century script within the rear fender flashes.

Special
Like the rest of the line, bulky and more heavily chromed styling characterized the 1958 Special. Special was spelled out across the deck lid, while a bright Sweepspear and a large rear fender bright flash was similar to other Buick models. A more plush Custom interior was available at extra cost. Notable was that the Dynaflow engined Specials, while still saddled with lower compression and a 2-barrel carburetor, had the Senior engine camshaft fitted – but horsepower was not stated as changed.

Historical
Model year production was 241,892 units, for a 5.7 percent market share. The four millionth Dynaflow transmission was built installed in a Buick this year. Likewise, the one millionth Buick power brake vehicle was built.

1958 Buick – Factoids

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The Buick Limited name was revived as a single-year halo car for the Division.  Instead of a chromed side panel trim, it got a body color-keyed insert decorated with fifteen slanted hash marks. The Limited also received its own rear tail treatment that traded the heavy chrome tail light housings for a wraparound tail light lens broken up by four chrome bands.

Buick recognized that the weight of their vehicles were rising and that, coupled with the advent of  more powerful engines allowing higher tops speeds, was leading to the longer stopping distances and brake fade. Their solution was to dissipate braking heat faster with aluminum drums around a steel liner. This was an effective solution. The Special Series did not receive this drums as standard.

Buick recognized that most automatic transmissions in the luxury brands had moved to 3- or 4-speed transmissions to allow engine rpm to be minimized under acceleration and to offer selection of intermediate gears under certain driving  conditions. This unit was similar to the Twin Turbine, but had a variable pitch stator that increased converter’s torque multiplication to 3:1.  It did not have a manually selectable low gear (the only kickdown mechanism being the variable pitch stator), and had a shift quadrant that read P-R-N-D-G (where “G” stood for “grade retard”), moving reverse to the more practical position near park.

Like other GM brands, Buick offered Air ride rear suspension this year. Ostensibly, the system replaced the rear springs with air bladders and a compressor/tank. The system had an automatic leveling feature, and is was said to smooth the ride over bumpy roads. Unfortunately, it was prone to have the bladders fail and the system was complicated. It did not last long.

1958 Buick Facts – Models Offered

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Special – A more heavily chromed styling adorned the 1958 Special chassis. The Special name was spelled out across the deck lid, while a bright Sweepspear and a large rear fender bright flash was similar to other models. Standard features on the Special included an ignition key light, glovebox light, cigar lighter, trip mileage indicator, geared front window vent panes, bumper guards, variable-speed wipers, Step-On parking brake and on the Model 46C convertible received an outside left-hand rearview mirror. Special interiors were trimmed with grey cloth and vinyl or Cordaveen and vinyl, or all Cordaveen in the convertible. A more plush Custom interior was available at extra cost.

Special models were  2 door Sedan, 4-door Sedan, 2-door Hardtop Coupe, 4-door Hardtop Sedan, Convertible, 4-door hardtop 6-passenger Station Wagon, and 4-door post sedan 6-passenger Station Wagon.

Century –The Century shared the Special’s new sheetmetal and had as much plated brightwork. In addition to the Century name spelled out in block lettering on the deck lid, the 60 Series had Century script within the rear fender flashes. Standard equipment, in addition to features found on the Special, included Variable-Pitch Dynaflow, full wheel covers, carpeting, padded dash, foam rubber cushions, electric clock and dual horns. Custom-interiors were trimmed in nylon, except for the Model 69 Caballero Estate Wagon, which was upholstered in Cordaveen. The model 46C convertible had electric windows and two-way seat controls.

Century models were  4 door Sedan, 4-door Hardtop Sedan, 2-door Hardtop coupe, Convertible, and 4-door hardtop Caballero  6-passenger Station Wagon.

Super – The once most popular Buick line was reduced to two models for 1958. Side trim was similar to lesser series, except for the Super lettering on the rear fender flashes, but Supers used the longer wheelbase C Body of the Series 75 Roadmaster and Series 700 Limited. The Super name was also lettered across the deck lid. Standard equipment included Variable-Pitch Dynaflow, power steering, power brakes, a safety-cushion instrument panel, fully carpeted floor, courtesy lights and other items found on lesser models.

Super models were 2-door Hardtop and 4-door Hardtop.

 

Roadmaster –The Roadmaster had all the brightwork of the Super plus bright wheelhouse moldings, a ribbed rocker panel molding and ribbed inserts to the rear lender flashes. All 1958 Roadmaster models were  now designated 75 series, as shown in the script and numerals on the fender flashes. On the rear deck, Roadmaster was spelled out in block lettering beneath a Buick emblem housing the trunk lock keyway. Standard Roadmaster features, in addition to those found on lesser Buicks, included power windows, a power six-way front seat, safety cushion dash, carpeted floors and lower doors, Glare-proof rearview mirror, safety buzzer, brake warning light and Deluxe wheel covers. Interiors were cloth or cloth and leather except for the convertible, trimmed in all leather.

Models available were 2-door Hardtop, 4-door Hardtop, and Convertible.

Limited – Buick resurrected  Limited nameplate, last available in 1942 for a new extra luxury line in 1958. 15 vertical louvers and an absence of stainless  were the distinguished trim for the Limited. All the chrome associated with other 1958 Buicks was present as well. The Limited had its own massive, louvered taillamps. Limited script was found on the rear doors or quarters, and a Buick badge flanked by four chrome bars was found on the Limited, which featured ultra-plush cloth, cloth and leather and in the case of the Model 756 Convertible, all-leather upholstery.

Models available were 2-door Hardtop, 4-door Hardtop, and Convertible.

1958 Buick Facts – Engines

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364 CID 2-Barrel V-8 – Manual Transmission. Overhead valves. Cast iron block. Five main bearings.
Displacement: 364 CID.
Bore and stroke: 4.125″ x 3.40″.
Compression ratio: 8.0.0:1.
Horsepower: 250 @ 4400 RPM.
Torque: 380 @ 2400 RPM.
Valve lifters: Hydraulic.
Camshaft timing: Intake 282°, Exhaust 282°, Overlap 62°, Lift (intake) 0.378″, (exhaust) 0.378”.
Carburetor: Stromberg 2-Barrel WW Model  108; or Carter WGD 2-Barrel Model 2674.

NOTE:  Available in Series 40 Buick Special Only.

364 CID 2-Barrel V-8 – Dynaflow Transmission. Overhead valves. Cast iron block. Five main bearings.
Displacement: 364 CID.
Bore and stroke: 4.125″ x 3.40″.
Compression ratio: 9.5.0:1.
Horsepower: 250 @ 4400 RPM.
Torque: 380 @ 2400 RPM.
Valve lifters: Hydraulic.
Camshaft timing: Intake 297°, Exhaust 297°, Overlap 75°, Lift (intake) 0.423″, (exhaust) 0.423”.
Carburetor: Stromberg 2-barrel WW Model  109; or Carter WGD 2-Barrel Model 2675.

NOTE 1:  Available in Series 40 Buick Special Only.
NOTE 2: While compression ratio in the Dynaflow Transmission version is much higher and it utilized the senior Series’ camshaft, Buick rated this engine at the same HP and Torque of the SMT version. It is unlikely this was true.

364 CID 4-Barrel V-8 – Dynaflow Transmission. Overhead valves. Cast iron block. Five main bearings.
Displacement: 364 CID.
Bore and stroke: 4.125″ x 3.40″.
Compression ratio: 10.0:1.
Horsepower: 300 @ 4600 RPM.
Torque: 400 @ 3200 RPM.
Valve lifters: Hydraulic.
Camshaft timing: Intake 297°, Exhaust 297°, Overlap 75°, Lift (intake) 0.423″, (exhaust) 0.423”.
Carburetor: Rochester 4-GC Model  7013100 or 7011600; or Carter AFB 4-Barrel Model 2800.

NOTE: Available in Century, Super, Roadmaster, and Limited with automatic transmission. Not Available in Series 40 Special.

1958 Buick Facts – Chassis Features

    • Wheelbase:  Special and Century – 122.0 inches; Super, Roadmaster & Limited – 127.5 inches.
    • Overall length:  Special and Century – 211.8 inches; Super and Roadmaster – 219.1 inches; Limited – 227.1 inches.
    • Overall width: Special and Century – 78.1 inches; Super, Roadmaster & Limited – 79.8 inches.
    • Overall height: Special  – 57.6 inches; Century – 56.9 inches;  Super 59.4 inches; Roadmaster & Limited – 59.6 inches.
    • Front tread: Special – 59.5 inches, Century, Super, Roadmaster & Limited – 60.0 inches.
    • Rear tread:   Special and Century – 59.0 inches; Super, Roadmaster & Limited – 61.0″.
    • Tires: Special Sedans- 7.10 x 15; Special Hardtops & Convertible, Century, and Super 7.60 x 15; Roadmaster & Limited – 8.00 x 15.
    • Optional Tires: Special Sedans- 7.60 x 15.

1958 Buick Facts – Powertrains

  • Variable Pitch Transmission Ratios
    • 1st – 1.82, 2nd –  1:10, Reverse – 1.82:1.
    • Stator Stall Ratio 3.5:1 @ 3100 RPM (low angle) 3.2:1 @ – 1950 RPM.
  • Flight Pitch Transmission Ratios
    • All: 1st – 1.82, 2nd –  1:10, Reverse – 1.82:1.
    • Stator Stall Ratio 4.5:1 @ 3200 RPM.
  • Three Speed Manual Transmission Ratios
    • Special Only: 1st – 2.153:1, 2nd – 1.373:1, 3rd – 1:1, Reverse – 2.279:1.
  • Rear Gear Standard Ratios
    • Dynaflow transmission: All – 3.23:1.
    • Manual transmission: Special  Only – 3.58:1.

1958 Buick Facts – Power Train Options

  • Engines:
    • 364 CID 250 HP Special V-8: Special only, Not Available Others.
    • 364 CID 300 HP V-8: Standard on Century, Super and Roadmaster, Not Available on Special.
    • Dual Exhaust:  Standard on Roadmaster and Limited; Optional on Special, Century and Super ($25).
  • Transmissions:
    • Variable Pitch Transmission: Standard on Century and Super. Optional on Special. Not used on Roadmaster and Limited ($220).
    • Flight Pitch Transmission: Standard on Roadmaster and Limited,  Optional on Special ($296), Century, and Super. ($75).
    • Three Speed Manual Transmission: Standard on Special. Not available on Century, Super, Roadmaster, and Limited.

1958 Buick Facts – Significant Options

    • Accessory group, Series 40 – includes electric clock, full wheel covers, automatic trunk light, rear license frame.
    • Air conditioning, In-dash or under-dash.
    • Air Poise air suspension.
    • Antenna, electric.
    • Autronic Eye.
    • Carpet cover.
    • Deluxe Handy mats.
    • Dor-Gards.
    • Easy-Eye glass.
    • Electric clock.
    • E-Z Eye glass.
    • Handy-Spot-lite.
    • Heater/defroster.
    • License frames
    • Padded instrument panel (standard Series 70, available for Series 50).
    • Power brakes (standard Series 50, 75, 700).
    • Power seat, six-way (standard Series 75, 700).
    • Power steering – standard Series 50, 75. 700 ($108).
    • Power windows (standard Model 66C, and all Series 75 and 700).
    • Radio antenna, electric.
    • Radio, Sonomatic.
    • Radio, Wonder Bar signal-seeking.
    • Rear seat speaker, except convertibles and station wagons.
    • Rear view mirror, inside glare-proof.
    • Rear view mirrors, outside glare-proof, right and left-hand.
    • Safety group – includes back-up lights, lower instrument panel pad, parking brake warning light, glare-proof inside rearview mirror (standard on Series 75 and 700).
    • Seat belts.
    • Spotlite.
    • Tissue dispenser.
    • Two-tone and tri-tone paint.
    • Upper instrument panel pad for Series 40 (standard other series).
    • Visor vanity mirror.
    • Wheel covers, full (standard on Roadmaster & Limited).
    • Whitewall tubeless tires.
    • Windshield washer (standard Series 75 and 700).

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