Also added was the #48 casting number heads with a 68cc (4.15cuin) chamber for higher compression, along with larger 2.11 and 1.77in (54 and 45mm) valves. Pontiac offered this to the public as a streetable version of the 421 SD. A three-speed stick was standard; a four-speed and automatic cost extra. It was the same engine as the '67-'68 400 HO[18] but for 1969 and 1970 it included a driver-selectable outside air induction system on the GTO(it was a separate option on Firebird), with the hood vents opened and closed using a knob located under the dash, below and to the right of the steering wheel, its bracket labeled "RAM AIR". Preparation: Install in rod, torque, measure ID 1975 Factory Service Manual lists the SD-455, but the SD-455 did not meet emissions for the 1975 model year and was canceled. SELLER Glendale, Arizona 85305. This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. Preparation: Weigh, soap-and-water wash Valvesprings: Crower, dual no damper Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore Thus, the quest to find 100 hp in a 421 started on the flow bench, before a wrench or machine tool touched any part of the 49-year-old engine. A mechanical system built by Rochester, it was similar in principle, but not identical, to the contemporary Chevrolet "fuelie". [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. Type Size Carb Horse Power Tourqe; Tri-Power: 389ci: 3x2bbl: 360 hp @ 5200 rpm: 424 lb-ft @ 3600 rpm: Base 8 . The short-deck block and different intake ports also required the design of a new intake manifold. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. Engine Specifications. The 421 SD produced up . For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). The heart of the build, a code 45B 1964 421 HO 370 HP manual trans 4-bolt main block, all Pontiac 421 engines without exception had 4-bolt main caps. This was to ensure there was enough fuel to cool the cast offset dished pistons. Only about 400 were produced before the fuel injection system was quietly dropped. Exhaust: 180 cfm at 0.500-in It requires a compression ratio of at least 10.25:1. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. Are you thinking of buying a 2007 muscle car, or any other car? 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. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. Block casting # 9773157. The 326 subsequently became the optional V8 engine for Tempests, and later the Pontiac Firebird, through 1967 and maintained the 17 degree cylinder head valve angle for its entire production run. The Block Date Code represents the production date of the engine. The 389 was the standard engine on the GTO up to 1966. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). The engine build will be discussed in two parts. A mere five were built, all with a four-speed transmission. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. 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. The engine was available in all full-size Pontiacs. Most likely prompted by its development of the Pontiac OHC six, the GM division built three different experimental SOHC 421 CID V8 engines in the early 1960s. Fuel pump: Will use 110-gph Carter In the 1960s the popular 389cuin (6.4L) version, which had helped establish the Pontiac GTO as a premier muscle car, was cut in half to produce an unusual, high-torque inline four economy engine, the Trophy 4. Duration at .050: 247/252-deg All 1980 Trans Ams received this engine as standard with the option to delete this engine choice as a credit option for the standard L37 301. Bore/Stroke ratio: 1.04:1 True Pontiac engines were designed and built in Detroitnot on a computer, but often by GI-bill-educated engineers who grew up working with their hands and now had a slide rule in their pocket instead of a greasy rag. of torque at 3,800 RPM in the GTO, and 340 HORSEPOWER at 5,300 RPM and 430-lb.ft. A larger 4in (101.6mm) ram air flex duct to the air cleaner from the left-hand fender, specific carburettor calibration for the Rochester Quadrajet, a "T/A 4.9" callout on the shaker, 60 psi oil pump, and cam similar in grind to the 220hp (164kW) 400 from the 19781979 model year were also included. Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). Shipping to: 98837. It was factory rated at 366hp at 5,400 RPM and 445lbs.ft. 1966 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA : 389: 8.6:1: 256: Manual: 91: 254: 2 bbl: WB . The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. Under the leadership of chief engineers Pete Estes and John DeLorean, Pontiac engine guru Malcolm "Mac" McKellar (1920-2011) and crew developed the Super Duty 389 and 421 NASCAR engines that embarrassed the Fords and Chevrolets at Daytona. It tips the scales at 3,950lbs. Like the 421, the 428 used a large-journal crankshaft, but externally it was the same size as all Pontiac V-8s of that era (the later 301 used a shorter deck height). An example of data being processed may be a unique identifier stored in a cookie. 1966 Pontiac GTO. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. 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. Make way for one of the baddest muscle cars of all time, the, An all-aluminum, race-proven V-8 defined the rare and wicked, The engine is what gives a muscle car its flamboyant personality. Not where most enthusiasts go first. Royal Pontiac's engine swap wasn't a new trick for Pontiac. Rocker arms: Crower roller, 1.6:1 In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. Timing chain: LPC, double rollerINDUCTION [citation needed]. Lobe separation angle: 112-deg 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. In addition, a shallower spherical-wedge combustion chamber moved the tuliped valve heads .040" closer to the piston at TDC, improving mixture draw considerably during the intake stroke. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. From 1977 to 1981 there were 4 distinct 301 versions: For 1981 model year vehicles, the engine codes are the 8th digit of the VIN. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. During 19511952, Pontiac had 23 287cuin (4.7L) V8-equipped 1953 model production prototypes running tests on the GM proving grounds. Only about 2000 like this one were built with 4 speed Muncie transmissions. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. Kits for Pontiac applications. The "670" head was a 1967-only casting, and the only PMD head to have a closed chamber with the new 14 degree valve angle. The 1979 W72/WS6 equipped Trans Am was considered to be one of the overall best performing cars of the decade due to having a powerplant that produced more power than any other competitor on the market at the time with handling equipment to supplement the performance.[12]. It's well documented that an internal combustion engine is nothing more than an air pump. 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . Perhaps the most unusual variation of the Pontiac V8 was the 1961-63 Trophy 4, which was a 45-degree inclined 194.43cuin (3.2L) inline-4 created from the right bank of the 389 for the debut of the Tempest. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). 093: 66 389 GTO: 65 . Valve guides: K-Line, liners The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. Valves: Competition Products stainless steel, 1.92 /1.66-in In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. street engine. The crankshafts were also unique in the fact that they featured only two counter weights instead of the usual five and also featured lightened connecting rod journals. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. SPECIFICATIONS. Rocker studs: ARP special 34-in bottom The initial press cars that were given to the various enthusiast magazines (e.g. This was a project started with the end goal of building a 427 Hemi. The 455 HO designation made its debut in 1970; Rated at 360 or 370hp (268 or 276kW) (depending on which vehicle it was installed into) & 500lbft (678Nm) of torque, it differed from the regular full sized car 455 by large valve heads with smaller combustion chambers, and a larger camshaft. . The next 1 or 2 numbers represent the date, and the last number is the year. All Rights Reserved. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. in. Laconic would be one way to describe this Pontiac's eBay listing, all it states is, "1966 Pontiac Ventura, 421 Tri-Power, 4 speed Runs/ Drives Great, Very Clean - Garage Kept".OK then, now you know what I know. For a few more ponies through better oil control, a factory full-length windage tray will be added, since Pontiac didn't use one on this engine originally. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. With the 1964-1967 Pontiac Catalina 2+2, Pontiac achieved a combination of power, road-holding, and fine styling superior to any other big Pontiac, and most of the competition's models besides. [19] The cylinder head design is similar to the Ford FE tunnel-port head used in the GT40 and Can-Am series racing. [7] Though listed as slightly less powerful than some high-performance iterations of the 400 (such as the 366hp (273kW) Ram-Air), the 455 had 500lbft (678Nm) of torque, 55 more lbft (75Nm). Unlike previous enlargements of Pontiac V8s, it did not replace the 389. Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs Pontiac Engine Torque Specifications. It had 2-bolt main bearing caps in 1969, but went to a block similar to the Ram Air IV's in 1969 that was drilled for 4-bolt main bearing caps (but used a cast crank and cast rods). Oil pump: . On premium fuel, it was rated at 207 hp at 5200 rpm and . 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. Offered from 1967 to 1969, it produced 360 and 376hp (268 and 280kW) in 1967, 375 and 390hp (280 and 291kW) in 1968 and 360,370 and 390hp (268,276 and 291kW) in 1969. 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. The 2+2 reverted to option status for '67, then died, a proud relic of a time when big cars, Pontiacs in particular, ruled the streets. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. Distributor: '61 Delco cast-iron with direct oiling It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. Beginning in 1961 the Pontiac V-8 (389 and 421) was dubbed the Trophy V-8, due to its many victories in racing. Continue with Recommended Cookies. Engine Oil: 95 ft-lbs. 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. [11] By mid-1978, the W72 could no longer be ordered in conjunction with the MX1 3-speed Turbo-Hydramatic 350 automatic transmission, and could only be ordered with the 4-speed manual transmission. It also could hold its own against a range of performance cars. In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. [citation needed]. He thinks the stock exhaust flow of 180 cfm will suffice for this build. He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. 301 4-barrel 'W72' or 'ESC' (170hp, 127kW) (with the 5th character of the VIN being a "W" for 1979-1980 and the 8th for 1981). 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. By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. Pontiac's SCCA Trans-Am program was promising, with race-ready engines producing 475hp (354kW) to 525hp (391kW), however the series General Competition Rules required the manufacturer to produce no less than 250 vehicles with the 303. Along with the HO it also had Pontiac's famous cast-iron "headers", which were much better at reducing backpressure than the regular manifolds. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). 1966 Pontiac Catalina 1963 Pontiac V8 Engine Specs. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. Mods: Intake port match, valve bowl blend, improved short-turn radius 1966 Pontiac Catalina . . The W72 also featured a camshaft with a higher duration, finer tuned 800cfm Rochester Quadrajet, insulated fuel line, larger 60PSI oil pump, chrome valve covers, a larger harmonic balancer, and the "T/A 6.6" Shaker decal. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. Centerline: 110-deg It included a new camshaft with duration increased from 288/302 (No. Pontiac V8 Engine Codes and Specifications. 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). For '65, the 421-cid V-8 became a standard part of the option package, and for '66, Pontiac made the 2+2 a separate model, still based on the Catalina two-door hardtop or convertible. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). 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 Whether all were installed in GTOs is unknown. Splayed main caps, head bolts tie into main caps. The four-barrel 400 was a popular performance option for many of Pontiac's cars. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. Seat pressure: 110 pounds at 1.600-in Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. While not related to the 400 W72, the concept was the same. Torque: See Part 2 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. The tri-power equipped XS-code 389 was shipped with the Ram Air pan in the trunk, and the dealer had to fit it and cut out the underside of the hood scoop to make it functional. . It added '421' engine badges on the front fenders, 2+2 insignia on the deck lid and rear fenders, and simulated louvers behind the front wheel cutouts. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 First offered as an option in 1963, the 421 HO came in a 4-barrel engine of 320hp (239kW) and one Tri-Power H-O version with a hotter cam and efficient iron exhaust manifolds and rated at 370hp (276kW). Royal Pontiac developed the prototype of the package on their 1965 GTO drag car and Pontiac picked up the idea and in August 1965 Pontiac offered the new Fresh Air package to dealers consisting of the parts and instructions needed to make the hood scoop functional, including the metal tub to mount to the carburetors and rubber gasket to seal it to the underside of the hood. However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 1966 yk 421 376 a 3x2 1967 zg 230 165 a 1 1967 zm 230 165 a 1 1967 zk 230 165 3 m 1 1967 zs 230 165 3 m 1 . 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 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. The air cleaners look like those used on the top dog 376 gross HP 421 CI engine but there was also a lesser 356 HP version available too. Unique exterior features included "2+2" badges, twin lens taillamps, and chrome bodyside gills; Pontiac's famous eight-lug aluminum wheels were the ultimate optional touch. Today, they have an average value of $430,000 in #3 (Good) condition, while the best in the world is worth about $550,000. in., again available only in the GTO and Firebird. Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. 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). $6.49 shipping. The 421 engine is available only with related heavy-duty driveline components. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. It featured a smaller bore of 3+34in (95.3mm) coupled with the same 3in (76.2mm) stroke of the 301 (same bore and stroke used by Chevrolet when the first small block motor was introduced in 1955). In 1969, Pontiac also used a revised crankshaft out of a Pearlitic malleable-iron, although it still used the "N" casting letter. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. Size cfm: Total flow, 1,050 cfm 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . Buckets and a console were added to the top-line Catalina interior, which could be optioned with a sport steering wheel and instrumentation that included a tachometer and oil-pressure gauge. The heads were a new design featuring siamesed intake ports. 1968 - 400 Ram Air II Round Port Code 96. . 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. / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . Valve seals: U.S. Seal The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. Casting No. In 1977 the 400-cubic-inch (6.6L) T/A 6.6, (RPO code W72) was created to fulfil the performance engine gap in the Pontiac line-up. The 1975 455 HO package received some negative press/reviews as some buyers expected to see a return of the 1971-1972 engine, and were disappointed when they received the lower output motor. Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. Math, not gasoline, makes horsepower under the hood of a Pontiac. A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. It also sports the four-speed manual, limited . Primary tube length: approximately 31.00 inches Pontiac ignited the classic muscle car era with a stroke of marketing genius. A limited-slip differential and gearing up to 4:11.1 were optional. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . 1966 Pontiac 2+2 $64,995. 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 . 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. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . Pontiac differed from other GM Divisions and most other manufacturers in producing only a single small block V8, rather than adding a larger big block to its line-up. The 1981 301 Turbo gained the electronic controls with an O2 sensor, feedback ECM and E4ME Quadrajet providing a slight reduction in output to 205hp (153kW) and 340lbft (461Nm).The 301 Turbo was limited to Trans Am and Formula Firebird production only. It was rated at 366bhp (273kW) (gross) in the GTO version. Spiral clip See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. designs, the SD-455 was a much improved engine. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. For 1967 only Pontiac called this engine the Quadra-Power 428. Price $30000.00. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. This chart covers Pontiac V8 Engines; 265, 301, 326, 350, 389, 400, 421 . In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. 1962 - 389 SD Code 544127. The 4-barrel version was available from 1978 to 1981 and the Turbo version was limited to the 1980 and 1981 model year, however, it was originally intended to be available for the 3rd generation Firebird before its cancellation by GM. The 400 2-barrel kept the 17 degree valve angles for '67; starting in '68 all Pontiac V8s went to the 14 degree valve angle. Intake: 218 cfm at 0.500-in In the 1968 Pontiac GTO it was given a 10.75:1 compression ratio and tuned to deliver 360 horsepower and 445 foot-pounds of torque.[2].
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