Preparation: Install in rod, torque, measure ID Unfortunately, that's what happened with the 1963 Pontiac Super Duty 421. Tri-power engine rated at 376 hp. While production of 196970 A-body Ram Air IV cars was low at just 1563 units(759 1969 GTOs including 302 Judges, and 804 1970 GTOs including 397 Judges) 1969 and 1970 model year F-body Ram Air IV cars were even rarer at just 245 total units produced. However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. The 428 was factory installed in large cars only. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. $6.49 shipping. It requires a compression ratio of at least 10.25:1. in., again available only in the GTO and Firebird. Ellingson Motorcars (877) 638-7170. Email Email. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. 1966: 421: 9782611 (late) 1967-1969. The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. From 1959 to 1966 Pontiac continues making improvements. Year. It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. 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.Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. 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. Crank: Original '64 421 744) and a new valve spring package with dampers to positively control valve action. Manage Settings 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. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. This money bought a potent 389 V-8 with 267-283 bhp . By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. Are you thinking of buying a 2007 muscle car, or any other car? The Armasteel cast crankshaft was the standard hardened cast-iron crankshaft used throughout the entire Pontiac V-8 line until 1967. Two tri-power 421s were optional, one with 356 bhp, the other with 376. In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. Bore/Stroke: 4.150/4.00-in - P.Top - Correct Exterior/Interior. The company says engines running this cam benefit from headers, cylinder-head port work, a large-cfm carb, and an ignition upgrade. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. By 1963 Pontiac decided it was time to release the 421 V8 officially to the general public and the motor would continue to be available until the end of the 1966 model year. In addition to the more refined cylinder heads, block casting reinforcements in the lifter galley and main bearing oil pan rail area, it had forged connecting rods with larger 716-inch-diameter (11mm) bolts. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Only about 2000 like this one were built with 4 speed Muncie transmissions. 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. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the 455 engine, it was re-introduced mid-year as an available option for the 1975 Pontiac Trans Am. [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. The 421SD was available in 1961 as a dealer option or over the counter then in 62 and 63 from the factory, and was fitted with a list of internal modifications designed solely to withstand the abuse of drag racing. The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. Styling for Status. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. Lifters: Crower solid with EDM oil hole (0.024 inch) After outselling Oakland, Pontiac became the sole survivor of the two by 1932. A mechanical system built by Rochester, it was similar in principle, but not identical, to the contemporary Chevrolet "fuelie". 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. 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 . Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. If you enjoy the videos and would like to Sponsor me on Patreon, my Creator link is https://www.patreon.com/MyCarStoryWithLouOn "My Car Story" we're in Huntl. 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. Upon reflection, many did not consider that it was the only large displacement engine still on offer for any performance car on the market, and reconsidered Pontiac's position between the rising CAFE emissions restrictions.[14]. This installment includes the assembly and parts selection up to the long-block. 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. 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. intake duration and later 1964 L with 288deg intake essentially the same as the 068 cam. Deck Height: 10.215-in What is important is the total timing, the . By 1965 and 1966 the same combinations would be rated at 338hp (252kW) for the 4bbl and the two Tri-Power versions would be rated at 356hp (265kW) and the H-O version at 376hp (280kW). 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. [19], Parts for Ram Air V engines are not readily available. 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. Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs Example: A128 = January 12, 19*8. Lobe separation angle: 112-deg 1967 - 400 Ram Air Code 97. Engine Block Date Code. 1966 Pontiac Ventura Specifications. Free-flowing exhaust manifolds from the 400 Ram Air were used late in the model year. 400 Ram Air (1969) / Ram Air (1970), aka Ram Air III, Learn how and when to remove these template messages, Learn how and when to remove this template message, "Tested: 1968 Pontiac GTO 428 / Royal Bobcat", "1969 Pontiac Grand Prix 428 specifications | technical data | performance | fuel economy | emissions | dimensions | horsepower | torque | weight", "Muscle Car Horsepower How Exaggerated Was It? Ram Air induction was optionally available with the 455 HO in the Firebird Formula(standard on Trans Am), GTO (standard with "The Judge" package), and 2-door LeMans Sport when the T41 Endura Styling Option was also ordered. / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). Model Number: Body/Style Number: Body Type & Seating: Factory Price: . The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. An evolution of the RA IV and H.O. Optional power was the 421/356 with Tri-Power or the 421 HO putting out 376 horses with Tri-Power. The consent submitted will only be used for data processing originating from this website. The shaker wore the decals "455 H.O." which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. Power output ranged from 135hp (101kW) to 170hp (127kW). [8] All of these improvements provided the W72 with a power rating of 200hp (203PS; 149kW) at 3600 rpm and 325lbft (441Nm) of torque at 2400 rpm, while the standard L78 400 only produced 180hp (182PS; 134kW) at 3600 rpm and 325lbft (441Nm) of torque at 1600 rpm. or Best Offer. Simply put, what good is the power if the engine does not last? 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. 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. The next 1 or 2 numbers represent the date, and the last number is the year. Stating in 1962 the "421" and the "421 SD" engine became available as a factory option until 1966. The block is still at standard 421 bore size (4.09375") and will be bored to fit standard size forged 428 pistons (4.120"). 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). Using an equation the author has provided in HPP many timesmost recently with The Mule engine seriesit was revealed that around 228.6-cfm flow though the intake port of the cylinder head is required to produce the desired 470 hp. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). These are general guidelines. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. The 338-bhp four-barrel was the base engine. Compression jumped from 11.0:1 to 12.0:1, while other tweaks increased maximum shift points by 500 rpm, to a screaming 6400 rpm. 1966 Pontiac 2+2 $64,995. Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish The Pontiac V8 engine is a family of overhead valve 90 V8 engines manufactured by the Pontiac Division of General Motors Corporation between 1955 and 1981. Setting initial timing at idle with the vacuum advance disconnected will usually fall around 12 to 16 degrees, but that's not really important. Both of these engines were originally dealer-installed options, but since the NHRA moved to limit racing eligibility to factory-available options on cars available to the public, Pontiac made the SD 421 a factory option for 1962, and most of the approximately 164 SD 421 engines were installed in the Catalina, with another 16 being installed in . 093: 66 389 GTO: 65 . . 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). All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. The single four barrel was rated at 333 bhp while the Tri-Power version carried a 348 bhp rating. 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. The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. The inlets were all well within the boundary layer that exists close to the surface, so all of these systems would more accurately be described as "outside air induction" systems, benefiting from the intake of cooler, and thus denser, outside air versus the comparatively hotter and less dense air under the car's hood. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. If you've been thinking about cruising the local boulevard in a classy convertible, but find yourself longing for the power under the hood that only a muscle car provides, perhaps it's time to take another long look at Pontiac's restyled 1965 Bonneville convertible. In 1963 Pontiac dropped the Buick division built 215 cu. 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). Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. The XS-code 389 was still rated at 360bhp at 5,200 rpm, same as the more common WS-coded Tri-Power 389, but performance was noticeably improved on acceleration runs. The 421 also marked the end of the option for a forged-steel crankshaft. Brand: Crower PN 60311, solid The engine build will be discussed in two parts. 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). Ram Air induction was optionally available with the 455 HO in the Firebird Formula (standard on Trans Am), and the 2-door LeMans (including GTO). VEHICLE TYPE . This is it! For 1971, Pontiac introduced another High Output (HO) version with standard internal parts, a reinforced block with four-bolt main bearing caps, and improved cylinder head design with 18-inch taller (3.2mm) intake ports and special round exhaust ports for better breathing, yet still making just 335hp (250kW) gross (or 310hp (231kW) in the more accurate SAE Net system). For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). Primary tube length: approximately 31.00 inches In 1968, there was also a 350 "HO" which had increased power with the addition of higher compression #18 heads (#17 and #46 were the most common 2-barrel heads), a four-barrel carburettor and matching intake that was also used on the 400 and 428 engines. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Calling into play enormous power and a decent 55/45 weight distribution, the 2+2 could be launched with little tire spin and guided through corners with alarming efficiency. in. But the "Ram Air" 400 also mandated steep 4.33:1 gears(or 3.90:1 in Firebird), making the Quadra-Power 400 (400 HO) the top practical street engine option for most drivers. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 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. engine, dual exhausts, three-speed manual transmission, Hurst shifter, 3.42:1 rear gears, heavy-duty suspension, bucket seats, upgraded upholstery, carpet, emblems, "Decor" louvers, pinstripes, lower . Pontiac offered this to the public as a streetable version of the 421 SD. The short-deck block and different intake ports also required the design of a new intake manifold. . V-8 (coded WG for stick or YH for auto) was the 2+2's base engine. Pushrods: LPC chrome moly The head design was incorporated from the earlier 1970's 350 Pontiac heads, and could satisfy emissions in all states except for high-altitude emissions states and California. Boost was wastegate limited to 91psi (0.6210.069bar). A panel covers the dash opening where the radio would have been on a standard Catalina. The 421 SD produced up . Pontiac had prepared for the forthcoming cancellation of the venerable 400 by producing large volumes of the stronger cast "XX" 400 blocks in 1977 that were assembled in 1978, and stockpiled at a warehouse by the assembly plant for later use. Beginning in 1961 the Pontiac V-8 (389 and 421) was dubbed the Trophy V-8, due to its many victories in racing. A mere five were built, all with a four-speed transmission. 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. . The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. A big chunk of the appeal of the 1965 and '66 2+2 was the fact that you got a standard 421 under the hood: The 338hp, four-barrel 421-cu.in. 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. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. Centerline: 110-deg It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. 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. 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. 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 . All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . designs, the SD-455 was a much improved engine. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. Officially named the Quadra-Power 400 for 1967 and renamed 400 HO for 1968, the 400 HO was first offered for 1967 as the third engine in the GTO line after the automatic-only 400 2-barrel and the standard 400 4-barrel (the 400 HO would not be offered in the Firebird until the 1968 model year). At the request of Ed Cole, general manager of Chevrolet, the layout was also used by the Chevrolet V8 released in 1955, an exception to the customary GM policy of allowing a division one year of exclusive use of an internally developed advance. 1968 Pontiac GTO 428 / Royal Bobcat. 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. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Most Pontiac engines like total timing (rev engine past 3000 or so until the mechanical advance stops moving/advancing, vacuum advance disconnected to check total timing) somewhere between 32 and 36 degrees. As a result, it was remarkably free of teething problems. Ram Air induction was optional in the GTO, though power ratings were unchanged. 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. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. The Pontiac V8 engine is a family of overhead valve 90 V8 engines manufactured by the Pontiac Division of General Motors Corporation between 1955 and 1981. ft. After the SD-455 was certified with the new cam, it was production-ready but was then further delayed by the EPA mandating Pontiac recertify all of its engines when the EPA discovered that part-throttle emissions exceeded the limits. Most Pontiac engines were painted light blue. in. Both used a single two-barrel carburetor. This same camshaft was also used in Pontiac's 19691970 RA IV production cars. Rear Main Cap. The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. The last was the 421 HO and included a high-output camshaft and valve train. 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. Here is another number to ponder: 370 hp. The overhead-cam six-cylinder engine was new for 1966 and the standard engine in the Tempest and Tempest Custom. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . Simply called "Ram Air" by Pontiac[17] it was the first in a series of engines available from Pontiac as regular production line options and officially called Ram Air. And it cruised silently and rode with less harshness than muscle intermediates. In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. Modified versions of this engine were extensively used in NASCAR stock car racing and drag racing competition. This was to ensure there was enough fuel to cool the cast offset dished pistons. 1966 Pontiac Catalina technical specifications and data. It was rated at 366bhp (273kW) (gross) in the GTO version. 1969 - 400 Ram Air III Code 62. To learn everything you need to know about car engines, see. Next time we will cover the induction system and the dyno testing to see if Jim meets his goal. Brand: Fel-Pro head and intake/ SCE pan and timing cover There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. 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. Maximum RPM (high-RPM engine): over 8000 rpm, Engine weight: estimated 550lb (249kg) complete, Power: estimated 640hp (477kW) at 7500rpm, This page was last edited on 30 January 2023, at 13:15. 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). The 1981 rendition of this engine was officially called the 301-EC [EC standing for Electronic Controls] in the 1981 GM factory service manual, removing the need for a W72 option separately as it was now the standard motor, similar to how all W72 engines in 1979 were coded L78.[16]. 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." Along with being cheaper to build, this allowed more consistent valve action with less weight than a conventional shaft. The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966. 287. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. 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). He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. When Robert Critchfield took over as general manager in 1952, he launched an ambitious plan to move Pontiac into the upscale, mid-range market occupied by Oldsmobile, and that demanded V8 power. Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. Given how late in the model year it was, Pontiac decided not to incur the costs of recertifying the SD-455 for other models other than the Firebird. The Pontiac 301 EC (Electronic Controls) version offered in 1981 produced 155hp (116kW) and 245lbft (332Nm), although it's rumoured that the actual output was closer to 170hp (127kW). Piston-to-deck height: 0.009-in According to GM mandates horsepower was now rated in net figures as opposed to gross, so on paper the 1972 455 HO appeared to have a significant drop in power, but in fact it was very much the same engine, and performance figures reveal this to be true. Located at the back of the engine near the Distributor. SPECIFICATIONS. Engine Oil: 120 ft-lbs. Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. Pontiac did not release official power ratings for this engine, saying only that it had more than 300hp (224kW). . This was a completely stock car on loan from a private owner for the test. Even more powerful were the 421 Super Duty V8s that could produce up to 410 horsepower. Transistorized ignition was available. The rod weighs 751 grams versus the stock rod at 958 grams. Distributor: '61 Delco cast-iron with direct oiling Price $30000.00. It remained on the same platform, but for the 1966 models, it became a different Pontiac series. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . 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]. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline.