1966 pontiac 421 engine specs

The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. On this Wikipedia the language links are at the top of the page across from the article title. Brand: Crower PN 60311, solid Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. The engines feature a cast-iron block and head and two valves per cylinder. Preparation: Weigh, soap-and-water wash The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. Maximum flow at 28 inches of water 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). In 1968, a 320hp (239kW) HO option was offered in the Tempest and Firebird. In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. . . 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). Oil pan: 8-quart with extended pick-up, fabricated retention clamp 1966 Pontiac Catalina / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. RamAir 4 Motor Price $15500.00. Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. or Best Offer. Fuel pump: Will use 110-gph Carter By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. The Ram Air II also incorporated the first computer-designed camshaft. Lobe separation angle: 112-deg Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish 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. For the truly obsessed, 16 Grand Prixs were built with Pontiac's 421 Super Duty engines, rated at a staggering 370 bhp. 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. 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. Modified versions of this engine were extensively used in NASCAR stock car racing and drag racing competition. The valve angle was reduced from 17 degrees to 14 degrees for better breathing. The GTO's new hood scoop design, with the inlets centrally located and mounted above the carburetor, provided the opportunity for experimentation. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . Neither casting was equipped with an exhaust crossover. The compression ratio will be 10.6:1. [4] It was replaced by the 455 for the 1970 model year. Though airflow is paramount in making power, there are other aspects of the engine that are just as important. 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 two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. 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. Pontiac V8 Engine Tune-Up and Torque Specifications. I don't know if it can be done, but I'm going to try." 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. 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. It used the "744" camshaft (301-313) in the earlier manual trans versions, later downgraded to the "068" version, and the 288/302 duration cam with automatic transmission. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. 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 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. They came up with a 269-cubic-inch (4.4L) L-head design. Royal Pontiac's engine swap wasn't a new trick for Pontiac. The short-deck block and different intake ports also required the design of a new intake manifold. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). Pontiac V8 Engine Codes and Specifications. Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. The camshaft was the HO cam with 288/301 duration. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. . However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. 068) to 301/313 (No. Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. 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. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. The 421 engine is available only with related heavy-duty driveline components. 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. 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 block is still at standard 421 bore size (4.09375") and will be bored to fit standard size forged 428 pistons (4.120"). With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: Intake: 218 cfm at 0.500-in The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. 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. 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 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. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. Casting No. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. [22]. Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. This was a project started with the end goal of building a 427 Hemi. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. 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? Method used to retain pins in pistons: . Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". Mods: Flow-test indicated '66 center carburetor would be required to improve total cfm, adapter made to fit '66 center carburetorIGNITION He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. 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. The engine was available in all full-size Pontiacs. The initial press cars that were given to the various enthusiast magazines (e.g. $6.49 shipping. Next time we will cover the induction system and the dyno testing to see if Jim meets his goal. The 1966 Pontiac Ventura doesn't necessarily come up when speaking of 60's muscle cars, but the type of V-8's offered with the Ventura meant plenty of power. 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). Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. Pushrods: LPC chrome moly For 1967 only Pontiac called this engine the Quadra-Power 428. [citation needed]. The 1969 HO 350 HO was equipped with the 400cuin (6.6L)'s large valve heads (# 48's) and the 400 HO camshaft and rated at 330hp (246kW). Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. 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. PONTIAC : 1965-75Tune-up Specifications : Year: Engine Car Model: Spark Plug Type (AC) - Gap: Point Gap: Dwell Angle: . 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. We and our partners use cookies to Store and/or access information on a device. Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. The most valuable Pontiac GTO is the 1969 Judge convertible with the 370-hp Ram Air IV engine. 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". Both used a single two-barrel carburetor. In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. in. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. The 287 was an "oversquare" engine with a bore and stroke of 3+34in 3+14in (95.3mm 82.6mm), for a total displacement of 287.2cuin (4.7L). From 1969 though 1970, the Ram Air IV was available in both A-Body (GTO, including Judge) and F-body (Firebird, including Trans Am) form. The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). For 1969-1970 GTO the 400 HO included driver operable Ram Air induction and was renamed "400 Ram Air" for 1969 and just "Ram Air" for 1970. 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. HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. 301 2-barrel (135hp, 101kW), (5th character of the, 301 4-barrel (150hp, 112kW), (5th character of the. 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. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. 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). Two-barrel carburetor, 8.5:1 compression, 227hp (169kW) @ 4600rpm, 333lbft (451Nm) @ 2300rpm, Four-barrel carburetor, 10:1 compression, 244hp (182kW) @ 4800rpm, 350lbft (475Nm) @ 2600rpm, Two-barrel carburetor, 10.0:1 compression, 244hp (182kW) @ 4800rpm, 350lbft (475Nm) @ 2600rpm, Four-barrel carburetor, 10.25:1 compression, 270hp (201kW) @ 4800rpm, 359lbft (487Nm) @ 2900rpm. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). 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. and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Math, not gasoline, makes horsepower under the hood of a Pontiac. Lift: 0.515/0.525 with 1.6:1 rockers . Power output ranged from 135hp (101kW) to 170hp (127kW). Whether all were installed in GTOs is unknown. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. The engine compartment of this concours Catalina is beautifully finished. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins 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. 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. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. The 421 SD produced up . Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 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. 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 . The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257

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