1966 pontiac 421 engine specsflair disposable flavors

gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. Centerline: 110-deg Both used a single two-barrel 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." The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. 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]. 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. Pontiac V8 Engine Codes and Specifications. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm Only about 2000 like this one were built with 4 speed Muncie transmissions. The heads were a new design featuring siamesed intake ports. The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. Casting number: 97770716, '64 date Primary tube diameter: 1.75-in Seat pressure: 110 pounds at 1.600-in The engine was available in all full-size Pontiacs. High output Pontiac V8 Cylinder Heads. 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. A common misconception made by enthusiasts was the notion that all Pontiac engine equipped Trans Ams featured the "T/A 6.6" decal on the shaker, however, it was exclusive to the W72 engine that was featured on less than half of all Trans Ams made during this period. The 421 was first availabe in a SD (Super Duty) model that was built for racing. 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). (imp.) 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). 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 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. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 Engine Oil: 95 ft-lbs. In 1963 Pontiac dropped the Buick division built 215 cu. 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. Pontiac Engine Torque Specifications. 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. The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. 18 watchers VEHICLE TYPE . Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. The main upgrade for the engine was the ESC, (Electronic Spark Control)[15] which provided slightly more power at 170hp (127kW) with 4.9L (299cuin) for the 19801981 model years. 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. 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. Original plans called for a forged crankshaft, although actual production SD455s received nodular-iron crankshafts with minor enhancements. 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. NASCAR race cars embody the muscle car philosophy of power. 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. Greater throughput mixed with the proper amount of fuel and ignited at the ideal time for the flame to expand against the piston will result in more power. 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. Duration at .050: 247/252-deg Brand: Fel-Pro head and intake/ SCE pan and timing cover HP = flow at 28 in/H2O x 0.257 x # of cylinders. 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. For 1965, however, the 2+2 became a bonafide muscle car. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. . 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). 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 2-barrel version was last offered in 1979. [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. Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 These are general guidelines. It also sports the four-speed manual, limited . Angles used in valve job: 30-deg intake, 45-deg exhaust seat, width 0.040-in intake, 0.060-in exhaust 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. ][citation needed] T, While the exact total number of Ram Air V engines produced is not positively known, only about 25 303cuin (5.0L) engines were produced and about a dozen 428s and 366s. 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 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. This is the original car featured in the May 1962 issue of Motor Trend Magazine that was modified by Royal Pontiac and driven by Jim Wangers. Whether all were installed in GTOs is unknown. By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. The next 1 or 2 numbers represent the date, and the last number is the year. Pushrods: LPC chrome moly The 1970 '455 HO' was a conventional "D" port engine. It requires a compression ratio of at least 10.25:1. This new material had stronger alloys in the iron. Total Timing: 36-deg BTDC or choose Generic to see kits that might fit a . Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. The W72 301 was a tuned L37 301 Pontiac V8 with some minor upgrades. The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. Kits for Pontiac applications. Not where most enthusiasts go first. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. The Block Date Code represents the production date of the engine. of torque at 3,800 RPM in the GTO, and 340 HORSEPOWER at 5,300 RPM and 430-lb.ft. 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. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. - P.Top - Correct Exterior/Interior. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. Even more powerful were the 421 Super Duty V8s that could produce up to 410 horsepower. Valve seals: U.S. Seal 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. An example of data being processed may be a unique identifier stored in a cookie. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. This was based on results of over 1 million test miles, which was unheard of at the time. Collector size: 3.00-inGASKETS Lifters: Crower solid with EDM oil hole (0.024 inch) A panel covers the dash opening where the radio would have been on a standard Catalina. Some 400s were dealer installed. The horsepower ratings of this era were often dubious, with engines rated higher or lower in output for advertising, political, or insurance purposes. Rocker studs: ARP special 34-in bottom Cam was a #541596 McKellar No. Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. . Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. Rear Main Cap. The stroke increased to 4.21-inch (106.9mm). HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. Along with proper parts selection, accurate machining and assembly are also important. 1969 - 400 Ram Air III or 350HO Code 48. The single four barrel was rated at 333 bhp while the Tri-Power version carried a 348 bhp rating. The 389 V8 was first introduced by Pontiac in 1959. The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: Transistorized ignition was available. The "455 HO" moniker took on a whole new meaning with the introduction of the 1971 model year; Intended as a low compression progression from the previous years Ram Air IV engine, all 1971 455 HO engines used a heavy duty 4 bolt main block, round port cylinder heads (casting #197; with 8.4: compression), "Ram Air" style exhaust manifolds, and a two-part aluminum intake manifold. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). 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. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. Regarding Crower's upgrade suggestions for its . Price $14000.00. This was the last run for the 455 (7.5 L) motor from Pontiac, and production ceased on the 455 this year as it could no longer meet the emissions requirements any longer.

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