He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. The 389 was the standard engine on the GTO up to 1966. [19] The cylinder head design is similar to the Ford FE tunnel-port head used in the GT40 and Can-Am series racing. Seat pressure: 110 pounds at 1.600-in for 1980, and the 8th being a "T" for 1981). designs, the SD-455 was a much improved engine. Brand: Fel-Pro head and intake/ SCE pan and timing cover None of Pontiac's Ram Air engines actually enjoyed any true ram air effect. The 421 SD produced up . HOT ROD and CAR AND DRIVER) were fitted with the Ram Air IV-spec camshaft and functional hood scoops - a fact that has been confirmed by several Pontiac sources. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . Factory heavy-duty high-pressure oil pump and eight-quart sump, four-bolt main bearing caps with Moraine aluminum bearings, and #1110976 dual-point distributor without vacuum advance. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. The code consists of 3 or 4 digits. The four-barrel 400 was a popular performance option for many of Pontiac's cars. The 1971 Pontiac 455 HO was Pontiac's first engine to receive a special 800cuft/min (23m3/min) Rochester Quadra-jet carburetor with specific jetting. While the 400 offered excellent power in the GTO (360 horses and 445 lb-ft of torque in 1968), Pontiac turned to what it called 'big journal' engines for the muscle machine's next upgrade. The 455 HO moniker was again carried over, this time as a near-exact repeat of the 1971 offering, the only changes were the carburetors (they used a conventional 750cuft/min (21m3/min) unit this year), and the head castings (casting #7F6). In 1961 and 1962 they were available with either one 4 barrel carburetor or a dual 4 barrel carburetor setup depending on whether the buyer wanted to head to the racetrack or drag strip. Pontiac's V8s share the same 6.625in (168.3mm) connecting rod length, with the exceptions of the later short deck 301, 265, and 303 Ram Air V. Most Pontiac V8s had an overall length (to the edge of the water pump pulley) of 28.25in (718mm), an overall width of 27in (690mm), and a height (not including air cleaner) of 31in (790mm). According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. The goal of making a Pontiac Hemi succeeded but the engine was never produced. However, a few dealers would offer them in the GTO or Firebird and do their own installations, such as Royal Pontiac who offered the "Bobcat" conversion. The 421 SD became factory installed in 1962 and in 1963 a street version became available from the factory with a dual four-barrel or three two-barrel Tri-Power carburetion. The 301 Turbo was unique since it had a beefier block than the 197779 versions (which carried on in the non-turbo versions in 1980 and 1981), a very mild camshaft with 0.35in (8.9mm) lift and 250 degrees gross duration, a 60psi (4.1bar) oil pump to ensure adequate oil to the oil-cooled Garrett TBO-305 Turbocharger, a rolled fillet crankshaft, a fully baffled oil pan, and a specific 800cuft/min (23m3/min) Quadrajet carburetor. The L75 455 engine continued as an option into the 1976 model year for the Trans Am, however, Pontiac opted to drop the "H.O." Besides a variety of displacements, the Pontiac V-8 block saw a number of other changes over the years, including starter locations, main-journal diameters, engine-mounting points, and . The 301 Turbo package mandated air conditioning, the THM350 (sometimes referred to as the CBC350 in various literature) non-lockup automatic transmission (THM350C lockup in 1981 Trans Ams), and 3.08 rear axle gearing. 1966 Pontiac Catalina For 1967 only Pontiac called this engine the Quadra-Power 428. The earlier 1975-78 blocks had metal shaved from the journals and bottom end as well as a decrease in the nickel content of the block in an attempt to decrease the overall weight of the vehicle to help alleviate emissions and cost. This same camshaft was also used in Pontiac's 19691970 RA IV production cars. The V8 engine was introduced for the 1955 model year as the "Strato Streak". The 421 badging was standard on the 2+2, the 421 H.O. With some WS6 "Trans Am Special Performance Package" bundles in 1978, the W72 engine was incorporated with the WS6 option group and not listed on the dealer order invoice. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 These motors were built mainly for NASCAR or other racing purposes and were equipped with all the extra racing goodies that people were looking for. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . For the 1978 model year, Pontiac re-incorporated the earlier thicker cast cast engine block denoted by the cast number 418988 and a "XX" cast into the side of the block. Only about 2000 like this one were built with 4 speed Muncie transmissions. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. It was rated at 250hp (186kW) with 8.6:1 compression and 260hp (194kW) at 10.25:1 compression. Available only in the 1973 and 1974 Firebird Formula and Trans Am, the SD-455 consisted of a strengthened cylinder block that included 4-bolt main bearings and additional material in various locations for improved strength. 1966 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA : 389: 8.6:1: 256: Manual: 91: 254: 2 bbl: WB . Although it is much different from the original 1955-vintage Pontiac V-8 powerplant, the 301 has the distinction of being the last true Pontiac V-8 engine, as Pontiac ceased production of these engines effective April 1, 1981. However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. Simply put, what good is the power if the engine does not last? Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. VEHICLE TYPE . Now select an engine model (if applicable) -- Pontiac Engine Models -- All Pontiac Kits 151 301 326 350 3800 389 4-cylinder 400 421 428 455 Brodix Heads Edelbrock Heads Iron Duke L67 Pro Stock Dart Heads Pro Stock Heads Ram Air Runner Heads Super Duty Generic V8. . Rings: LPC (Liberty Performance Components) premium moly, standard tension When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. However, it can easily be determined by examining the cost price of the option, where the package excluding the W72 engine cost $251, and with the engine, cost extra at $324.[10]. 287. The main innovation of the Pontiac engine was reverse-flow cooling and the stamped rocker-arm system, which had been devised by Pontiac engineer Clayton Leach in 1948. Engine Specifications. Known as GM's performance-oriented division, Pontiac lived up to the hype by creating the first Muscle Car and kicking off the Muscle Car era. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. The 1955-up Pontiac V8 that finally reached the public was an overhead valve engine with cast iron cylinder heads and block and wedge-shaped combustion chambers. pontiac engine decoder year code c/i hp tran carb car misc 1962 13b 421 3 m 2 x 4 full super duty 1962 13u 421 4 m 2 x 4 full super duty 1962 bu 421 4 m 2 x 4 full super duty . The SD-455 motor was listed as an option in dealer brochures for the 1973 Grand Am and LeMans GTO(and planned for the Grand Prix as well) although none were produced for sale. 1965 Pontiac LeMans GTO Mecum. The 1979 Firebird model line was the last year for the Pontiac 400, and by this point not only was it required with the 4-speed manual transmission, it also required the WS6 Special Handling Package as mandatory equipment. Compression Ratio: 10.6:1 effective The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. This simply meant that Pontiac installed both the SD-389 and SD-421 into vehicles on its assembly line. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. Based in part on designs for the "short deck" 303cuin (5.0L) engine designed for the 1970 racing season, it had a shorter deck than the big V8, and used thin-wall castings to reduce weight. 10 with 308/320 degrees of duration and 0.445/0.447-inch lift (11.3/11.4mm) with 1.65:1-ratio rocker arms and solid lifters, special #529238 forged-steel connecting rods, forged aluminum 4.09-inch (104mm) bore Mickey Thompson pistons, #542990 forged-steel crankshaft with a 4-inch (101.6mm) stroke and 3+14-inch (82.6mm) diameter main journals. Engine Displacement: 432 ci These muscle car profiles include photos and specifications for each model: For related car information, go to these articles: Please copy/paste the following text to properly cite this HowStuffWorks.com article: the Auto Editors of Consumer Guide Some production test cars ran considerably slower and yielded 14-mile (402m) times in the 14.5 second/98mph (158km/h) range in showroom tune (uncited sources)- results that are quite consistent for a car with a curb weight of 3,850 pounds (1,746kg) and the rated 290hp (216kW) SAE NET figure that some sources suggest was "under-rated." The 2+2 package was first offered as a $291 option on Catalina hardtops and convertibles in 1964. Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. [22]. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. In the Firebird Ram Air induction for the 400 HO was a separate option for 1969(included with Trans Am) and included with the engine(optional in Formula; included with Trans Am) in 1970. 068) to 301/313 (No. Additionally, the 301 W72 never received the option to come equipped with a manual transmission like the standard 301 received in 1979, and disappointingly, production for all Pontiac V8's ended soon after as GM sought to "corporatize" engine production. Cam was a #541596 McKellar No. Hewing to GM's standing edict limiting engine size to 400 cu in for its midsize and smaller cars, the 360hp (268kW) (underrated),[citation needed] the 400 cubic inch Ram Air V-8 was the most powerful and advanced option available in the 1967 GTO and Firebird. Ellingson Motorcars (877) 638-7170. 421 CID V8 - 4BBL - Automatic - P.S. Standard ratio with the 400 was 3.55:1(except 3.36:1 in Firebird for 1969) regardless of transmission(3.23:1 for cars with air conditioning). Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. 1969 - 400 Ram Air III Code 62. As Pontiac still wanted to offer a performance motor to compete in the performance market, they looked back to the 400 Pontiac and how it could be improved to offer greater performance while meeting CAFE standards. Pontiac's initial plans were to use a camshaft with specs identical to the 041 Ram Air IV camshaft, but testing showed emissions, while technically compliant, did not have "cushion" to satisfy Pontiac's emissions engineers, to avoid production variation leading to any non-compliant engines being produced and sold. A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). Vacuum advance: Not usedEXHAUST Valves: Competition Products stainless steel, 1.92 /1.66-in It was offered in the following forms: For 1957 the V8's stroke was increased to 3.5625in (90.49mm), for a displacement of 347cuin (5.7L). The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. During 19511952, Pontiac had 23 287cuin (4.7L) V8-equipped 1953 model production prototypes running tests on the GM proving grounds. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. [citation needed] It was the first engine that incorporated Pontiac's round-port head design in a production vehicle, however the intake port was the same as other D-port heads, leaving a head which exhaust port could nearly match the intake at high valve lifts. Timing chain: LPC, double rollerINDUCTION Continue with Recommended Cookies. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. This test would tend to lend credence to the CAR AND DRIVER and HOT ROD tests of 1973 Super Duty cars with 3.42 gears, no air, and 160lb (73kg) less weight as being representative of production specimens capable of mid to high 13-second passes at 104mph (167km/h). They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. The 389 would remain the standard Pontiac V8 engine through 1966, offered in a bewildering variety of outputs ranging from 215 to 368hp (160 to 274kW). Jim told HPP, "Since I was a young man in the '60s, I always thought how great it would be to find a true 100hp in a legendary 421 Tri-Power setup that retained its iron heads and intake. Tri Power engine however was optional. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. The W72 package was a standalone option, and although was discounted when ordered in conjunction with the Y82/Y84/Y88 Special Appearance package, did not come included with Special Edition Trans Ams, it remained an extra cost option. In 1973 a further refined and even stronger but less powerful version, the Super Duty (SD) engine, was planned for Firebird, Grand Am, Le Mans (GTO), and Grand Prix models. From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. Stock Pontiac Engine Specs. Here is another number to ponder: 370 hp. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. It shared the 4.121in (104.7mm) bore of the 400, but with a 2.84in (72.1mm) stroke for a displacement of 303cuin (5.0L). The Ram Air IV used the Ram Air II's camshaft but lift in the Ram Air IV was increased to 0.52in (13mm) thanks to the use of 1.65 ratio rocker arms (vs 1.50). The 400 remained in production through the 1978 model year, with 1979 cars receiving engines produced the previous year. 1966: 421: 9782611 (late) 1967-1969. 1966: 421: 9782611 (late) 1967-1969. Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. or Best Offer. The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. 5 January 2007. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. The W72 Performance Package also included an upgrade to the rear differential ratio, setting the rear gear ratio to 3.23 for all 1977 and 1979 W72 Firebirds, with the exception being 3.42 for 4-speed equipped W72 Firebirds in 1978 only. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. Duration at .050: 247/252-deg Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. In the early '60s, the engine program at the Pontiac division of General Motors was a wide-open operation that bustled with innovation. SPECIFICATIONS. Block casting # 9773157. The rod weighs 751 grams versus the stock rod at 958 grams. The GTO's new hood scoop design, with the inlets centrally located and mounted above the carburetor, provided the opportunity for experimentation. The Pontiac 2+2 is a full size automobile that was manufactured by Pontiac, built on the B-body chassis.It debuted for the 1964 model year as a trim-only option for the Pontiac Catalina, with special door panels, bucket seats with a center console, and exterior badging.Pontiac marketed the 2+2 as the "big brother" to the popular Pontiac GTO.. Beginning in 1965 the name Catalina was no longer . The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. The last was the 421 HO and included a high-output camshaft and valve train. The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. 744) and a new valve spring package with dampers to positively control valve action. As Stock drag racing heated up at the dawn of the Sixties, the factories were serving up a constant stream of engines, transmissions and lightweight body par. The 1970 '455 HO' was a conventional "D" port engine. 1966 Pontiac Catalina . Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. Spiral clip Deck Height: 10.215-in The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). 18 watchers - P.B. Price $14000.00. The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. Regarding Crower's upgrade suggestions for its . 1. The manuals had Hurst shifters. or choose Generic to see kits that might fit a . The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. Engine displacement is a function of bore and stroke. This had extra-rich "DX" secondary metering rods and a remote vacuum source for the primary metering rod enrichment circuit to allow the Power Enrichment Vacuum Regulator (PEVR) to release the primary metering rods to move to the up position (enrichment) anytime during boosted conditions. The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. This included the ESC (Electronic Spark Control) distributor and controller borrowed from the 301 Turbo, which allowed for higher timing without the penalty of engine damaging pinging or preignition. On the invoicing for the 1979 model year Firebirds, they had the option listed as L78, however, every 1979 400 equipped car received a W72 engine. Here are features on more than 100, Muscle cars created their own culture. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. An example of data being processed may be a unique identifier stored in a cookie. A new engine was fast-tracked, its relatively late start allowing it to take advantage of developments proven in the Oldsmobile V8 and Cadillac V8. Exhaust: 180 cfm at 0.500-in In 1969, Pontiac unveiled its Trans Am model Firebird, and since racing rules required engines of less than 5L (305.1cuin), Pontiac unveiled the 303 for racing models only, never available to the public. Information and specs for the Pontiac 421 V8 engine. In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers. Pontiac introduced the OHC 6 in two flavors for '66: a base engine with a one-barrel carburetor that developed 165 hp at 4700 rpm, and a sportier version with a 10.5:1 compression ratio, a high-lift cam, a split exhaust manifold, and GM's new four-barrel Quadrajet carburetor (below). Bore/Stroke: 4.150/4.00-in The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. NASCAR race cars embody the muscle car philosophy of power. Diameter: 516-in It was rated at 475hp (354kW). Though a change of camshaft would delay production, Pontiac decided to change camshaft, employing one with identical timing to the 744 camshaft, which had been used in the 400 Ram Air(aka Ram Air III) engine with manual transmissions. 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). An HO version could be ordered in the GTO, as GM had lifted its restrictions on offering engines larger than 400cuin (6.6L) in mid-sized cars (resulting in the 454 (7.44) Chevrolet Chevelle, The engine was available in all full-size Pontiacs. [citation needed]. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor
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