1970 Buick GS Stage 1 Show Car GS Stage 1 Show Car Coupe - Plainfield, IL

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134023 / 1970 Buick GSX
For more information on this vehicle visit http://tinyurl.com/cweedua In 1970 Buick introduced the GSX as their answer to Pontiac's GTO Judge and Chevrolet's Chevelle SS454. Modestly rated at 360hp and 510 ft./lb. of torque, the GSX Stage 1 was described as a more luxurious HEMI 'Cuda because of its lighter weight and amazing power. In 2002, this particular example won a Senior Award from the Buick Club of America and the 'A' Body of The Year award at the Buick Nationals. In 2010 it racked up Concours Gold awards at both the Buick Performance Group Nationals and GS Nationals. Literally every nut and bolt on this GSX Stage 1 has been replaced to factory standards and showroom shine to ensure that it gets the most points possible from any discerning judge. Every weld and gap is perfect making for excellent panel fit and functionality giving this Buick a menacing, yet luxurious appearance. Chrome bumpers, door handles and window trim add an element of class and luxury. The combination of black, white and chrome is complemented by small splashes of color like the rear GSX decals and red pin stripping around the GSX side stripe. Red, white and blue Buick tri-shield center caps are bolted to GSX specific chrome trimmed 15 inch Rallye wheels. Those stylish Rallye wheels are wrapped in reproduction Super Wide Oval tires as if the car had just left the factory. Buick's mighty 455 big block V8 was one of the first motors to utilize thin wall casting and as a result is lighter than a comparable Chevrolet 454. Take one look under the hood at the numbers matching 455 and you'll see why this GSX is a gold winning car. Everything from the battery to the decals has been restored to showroom quality and nothing less than best of show. This particular GSX was up fitted from the factory with the Stage 1 performance package which added a hotter cam, bigger valves, low restriction Exhaust and revised jets in the Rochester Quadra-Jet carburetor. The result is an unpublished rating of 425hp and a ride that you'll never forget. This GSX also features Buick's Rallye Ride Control Package which includes a rear stabilizer bar, firmer front and rear shocks, rear firm ride springs and rear lower control arm assemblies. Connecting that massive power with this enhanced driving system is a factory option, numbers matching close-ratio 4-speed transmission. Equipped in only 188 Buick GSX's for 1970, that transmission sends the torque to the ground via 3.64 gears in a numbers matching high performance Buick Posi-Traction rear axle. At the front corners, factory power assisted discs and at the rear corners, factory power assisted drums bring everything to a stop. The guys at Then and Now topped off the restoration with a new fuel tank, new fuel lines, new brake lines, new body mounts and a fresh GM black undercoating. This sale includes documentation from the GSX Historic Society showing the car to be GSX number 622 of 678 produced for 1970. Also included are Concours gold plaques from the GS Nationals and Buick Performance Group Nationals as well as the Buick Club of America gold medal, affixed to the grille of the car, signifying senior award status. The car features a numbers matching 455 V8, a numbers matching 4 speed close ratio transmission and a numbers matching 3.64 high performance rear end. It is one of 178 Apollo White cars produced and one of 188 cars equipped with the manual transmission. Even after 40 years the interior of the GSX still feels luxurious and comfortable. The gauge cluster consists of a clock and brightwork set against wood grain texture. The seats and door panels feature upgraded vinyl, adding to the fresh feeling created by the nicer GSX dash. This gorgeous GSX has the hardware to satisfy your wants and the class to fulfill your needs. It has enough power under its hood, luxury behind its doors and trophies under its belt to make any car guy happy. The sale includes concours gold plaques from the GS Nationals and Buick Performance Group Nationals and documentation from the GSX Historic Society. Call today for a chance to own this award winning car!





1972 BUICK GS STAGE 1
Description





1970 Buick GS Stage 1 Convertible 2014 San Diego International Auto Show
San Diego International Auto Show The 400 was replaced for 1970 with the {7.4 litre} Buick V8, used in the GS 455. The base model V8 produced 350 hp (260 kW) and 510 lb·ft (690 N·m) at 2800 rpm. In the optional Stage1 trim it produced 360 hp (268 kW) and 510 lb·ft (691 Nm) at a low 2800 rpm. As with all American engines produced prior to the 1972 model year, these were SAE gross ratings, which are generally significantly higher than SAE net ratings and are not indicative of what actual production engines produce in their "as installed" condition (with all engine accessories and full Exhaust system in place). The fastest magazine test results from this period were obtained by MOTOR TREND Magazine, which managed to extract a 13.38 ET @ 105.5 MPH from their 3,810 pound GS Stage 1 coupe test car. Using Hale's Trap Speed formula, this result indicated actual "as installed" peak HP of approximately 360 SAE Net (ironically the same as its advertised Gross Figure, meaning this engine was very conservatively rated for that time period). The December 2004 issue of Musclecar Enthusiast" conducted an engine dynamometer test of a freshly rebuilt and well documented 1970 455 Stage 1 (bored .040" over to 464 cubic inches and minus the power robbing factory engine fan, air cleaner assembly and mufflers). In that condition and with factory timing and carburetor tuning, the engine produced a maximum of 360.9 HP. Optimal carburetor and ignition tuning yielded a peak HP reading of 381.7 HP - again with no engine fan, air cleaner or mufflers in place. While urban legend would have us believe that these engines made "420 HP from the factory," actual empirical results prove otherwise. Although another dynamometer test on a 1970 Skylark GS Stage I showed 471 SAE gross hp, which is more consistent with the engine producing about 360 SAE net hp. The Stage 1 engine option consisted of a more aggressive camshaft, higher compression, unique cylinder heads with larger (2.13" intake and 1.755" Exhaust) valves, a specially tuned 4 barrel Quadrajet carburetor, more aggressive ignition timing,5/8 inch oil pickup tube and a higher numerical final drive. The engine was available with either a firmer shifting turbohydromatic 400 or a Muncie M-22 "rock crusher" 4 speed (although it was later discovered, and confirmed, that one 1970 GS Stage 1 convertible was produced with a 3-speed manual) and a standard 3.64:1 Positraction axle ratio. Stage 1 cars equipped with air conditioning received a 3.42 axle ratio. While powerful in production form, the Buick 455 (including Stage 1) engines had problematic engine blocks. All used 2 bolt main bearing caps, the oiling system was under-sized for high rpm use (including Stage 1 engines) and thin walls in the lifter valleys promoted cracking. The magic of the Stage 1, it would seem, was primarily attributable to its advanced (for the period) cylinder heads and the relatively high mid-range horsepower they produced. The relatively unknown, very expensive, and very rare 1970 GS 455 Stage 1 drew a great amount of attention and controversy in the muscle-car world when in the 1980s it was listed as faster than any of the Chrysler Hemi cars in the original "50 fastest muscle cars" list. This Hemi vs. Stage 1 controversy has prompted several contests to settle the issue; it remains an unsettled matter and has been a great boon to car magazine sales over the years. There was also a rare Stage 2 option produced. This was a dealer-installed package (what was known as a "dealer option"), first offered in 1969. It included a cam, headers, intake manifold, high compression forged pistons, hollow pushrods, and some calibration changes to the ignition and carburetor. If the car was ordered with the Stage 2 package, the parts were shipped in the trunk of the car. In 1970(?) the Stage 2 package included special D- Port Exhaust port Stage 2 heads, matching Kustom brand headers, a radical cam, high compression forged pistons, Edelbrock B4B aluminum intake, Holley carburetor, and other equipment for racing. Few Stage 2s were ever used on the street and Buick only ever factory assembled 15 Stage 2 test units. One of which was a factory GSX test mule with 4 speed manual transmission used for speed testing. That GSX test mule was equipped with 4.78 gearing and was driven on the streets and tracks on the west coast. The Stage 2 package's existence was not made public until 1972 when the Stage 2 parts could be ordered in any combination. There is little documentation about the 12 Stage 2 cars that were sold. One was campaigned by Kenne-Bell/Reynolds Buick and the other was known as the Jones-Benisek car. The Jones/Benisek car is known to have been delivered as a Stage 1 car with all the Stage 2 components in the trunk in GM boxes.





VID00029.MP4
Roberta makes a low 11 second pass in HER 1970 Buick GS Stage1 455 at Norwalk Buick Raceday




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