With a view to the latter, what we find lurking under the hood is the 421ci Tri-Power V8. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . One of the key upgrades were the 6x4 heads. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. 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]. The stroke increased to 4.21-inch (106.9mm). Total Timing: 36-deg BTDC It was rated at 366bhp (273kW) (gross) in the GTO version. 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. Spiral clip In 1967, the Pontiac 2+2 became an option on the . [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. Block casting # 9773157. The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. They came up with a 269-cubic-inch (4.4L) L-head design. This money bought a potent 389 V-8 with 267-283 bhp . Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. 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. 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. 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. 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. Splayed main caps, head bolts tie into main caps. Engine Oil: 120 ft-lbs. Pontiac in the 1950s was one of a few US manufacturers that did not regularly identify their engine names and sizes with air-cleaner or valve-cover decals. The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. Intake manifold: Original '64 PMD tri-power The 1971 455 HO was available in the Firebird (optional in Formula; standard in Trans Am), the GTO (standard with "The Judge" package), and the 2-door LeMans, LeMans T-37 (including GT-37), and LeMans Sport. For those who may not be familiar with the equation, here it is again: 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 cylinder heads on the 400 CID version had an intake port volume of 290cc (17.70cuin), nearly twice the size of a typical standard D-port Pontiac head - and flowed in the area of 315cuft/min (8.9m3/min) @ 0.8in (20mm) valve lift; in the realm of the NASCAR-dominating Chrysler 426 Hemi. 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. The block is still at standard 421 bore size (4.09375") and will be bored to fit standard size forged 428 pistons (4.120"). After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. Preparation: Wash after balance for assembly A camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV-spec camshaft that had originally been planned for the engine (initially rated at 310hp (231kW) with that cam), but ultimately proved incapable of meeting the tightening emissions standards of the era with sufficient margin to satisfy Pontiac emission engineers given expected volume production variations. Size cfm: Total flow, 1,050 cfm Along with proper parts selection, accurate machining and assembly are also important. Are you thinking of buying a 2007 muscle car, or any other car? 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. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). This 1966 Pontiac 2+2 Convertible is a beautifully restored big-block convertible that is ready for some boulevard cruising! 1969 - 400 Ram Air III or 350HO Code 48. 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. 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). It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Price $14000.00. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. Every torque specification should be in this table, however if there is one missing, please Contact Me and I will get you the spec and add it to the table. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . Royal Pontiac's engine swap wasn't a new trick for Pontiac. Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. Federal emissions standards and the drive towards "corporate" engines shared among all GM divisions led to the progressive demise of the Pontiac V8 through the late 1970s. The 421 Super Duty had been the first of these, and their large bore and stoke made them popular in NHRA and NASCAR competition throughout the '60s. Next time we will cover the induction system and the dyno testing to see if Jim meets his goal. The valve angle was reduced from 17 degrees to 14 degrees for better breathing. Free local pickup. Ellingson Motorcars (877) 638-7170. . in., again available only in the GTO and Firebird. It was rated 180hp (134kW) @ 4600rpm and 264lbft (358Nm) @ 2400rpm with a two-barrel carburetor, 200hp (149kW) @ 4600rpm and 278lbft (377Nm) @ 2800rpm with the four-barrel carburetor. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. The mighty Pontiac 421 was a star on the drag strip and a super nova on the Nascar tracks of the first half of the 60s. 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). While all this sounds great, remember the engine will have to retain the small 1.92-inch intake valve because chamber space is too tight for larger ones. CO2, . Both used a single two-barrel carburetor. (imp.) All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. 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. 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. said the "Pontiac 421 cu. 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. It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. Distributor: '61 Delco cast-iron with direct oiling Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. Free-flowing exhaust manifolds from the 400 Ram Air were used late in the model year. The four-barrel version, set up for sustained high speeds, had 390 hp. 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 . Seat pressure: 110 pounds at 1.600-in This was a completely stock car on loan from a private owner for the test. 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. [citation needed]. 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 engine compartment of this concours Catalina is beautifully finished. Carb: (3) Rochester two-barrels PMD These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. Muscle Cars. Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified engines. 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. Wires: NAPA Belden 7 mm aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. An example of data being processed may be a unique identifier stored in a cookie. 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. 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. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. 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). Rocker arms: Crower roller, 1.6:1 Simply put, what good is the power if the engine does not last? moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. 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. Starting at the bottom, Jim will employ lighter and stronger parts in the reciprocating assembly, as evidenced by the choice of Howards billet rods and forged Icon pistons. Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. This new material had stronger alloys in the iron. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. 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). Ram Air induction was optional in the GTO, though power ratings were unchanged. There were a few 1962 Grand Prix models that came with a 421 SD from the factory so if someone is lucky enough to have one today then they have a car that is probably worth some decent money simply because of the rarity of these models.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[580,400],'enginefacts_com-medrectangle-3','ezslot_2',115,'0','0'])};__ez_fad_position('div-gpt-ad-enginefacts_com-medrectangle-3-0'); Engine Facts 2023. 1968 - 400 Ram Air II Round Port Code 96. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm 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]. 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. Rear Main Cap. Today, they have an average value of $430,000 in #3 (Good) condition, while the best in the world is worth about $550,000. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. Rocker studs: ARP special 34-in bottom Pontiac Engine Torque Specifications. It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. 1966 Pontiac Catalina . 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. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. Given that, it was no accident that the leader in intermediate muscle also put together the finest full-size performance machine -- the 1966 Pontiac 2+2. 1966 Pontiac Catalina In the early '60s, the engine program at the Pontiac division of General Motors was a wide-open operation that bustled with innovation. All 1977-1978 Trans Ams ordered with the 4-speed Borg Warner Super T-10 manual transmission received the W72 T/A 6.6 engine. [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6].
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