I don't know if it can be done, but I'm going to try." The camshaft was also revised to have a slightly higher duration, the carburettor jets tuned and a dual exhaust was implemented allowing the power to increase to 220hp (223PS; 164kW) at 4000 rpm and 320lbft (434Nm) of torque at 2800 rpm. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. A panel covers the dash opening where the radio would have been on a standard Catalina. Preparation: Weigh, soap-and-water wash All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. Here are features on more than 100, Muscle cars created their own culture. In 1961 and 1962 they were available with either one 4 barrel carburetor or a dual 4 barrel carburetor setup depending on whether the buyer wanted to head to the racetrack or drag strip. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . A mechanical system built by Rochester, it was similar in principle, but not identical, to the contemporary Chevrolet "fuelie". . Piston-to-deck height: 0.009-in The valve angle was reduced from 17 degrees to 14 degrees for better breathing. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. . The 2+2 package was first offered as a $291 option on Catalina hardtops and convertibles in 1964. The goal of making a Pontiac Hemi succeeded but the engine was never produced. Simply put, what good is the power if the engine does not last? Power output ranged from 135hp (101kW) to 170hp (127kW). Math, not gasoline, makes horsepower under the hood of a Pontiac. Length: 8.750-inCAM 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. A three-speed stick was standard; a four-speed and automatic cost extra. 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. 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. Lifters: Crower solid with EDM oil hole (0.024 inch) On this Wikipedia the language links are at the top of the page across from the article title. And it cruised silently and rode with less harshness than muscle intermediates. Compression Ratio: 10.6:1 effective Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. The 421 was first availabe in a SD (Super Duty) model that was built for racing. 1967 was the last year for closed-chambered heads. Returns; . 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. Math, not gasoline, makes horsepower under the hood of a Pontiac. In the early '60s, the engine program at the Pontiac division of General Motors was a wide-open operation that bustled with innovation. 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. To learn everything you need to know about car engines, see. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. 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. [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. intake duration and later 1964 L with 288deg intake essentially the same as the 068 cam. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. 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. This included the ESC (Electronic Spark Control) distributor and controller borrowed from the 301 Turbo, which allowed for higher timing without the penalty of engine damaging pinging or preignition. It also sports the four-speed manual, limited . The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. 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 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. Head bolts do not pull on the cylinder wall causing distortion. 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). 1968 Pontiac GTO 428 / Royal Bobcat. . Some 400s were dealer installed. 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. It was rated at 475hp (354kW). Though production cars only got the two hood air inlets the name was retained. Casting number: 97770716, '64 date Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. Primary tube length: approximately 31.00 inches All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. Pontiac . 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. 1966 Pontiac Catalina . It's well documented that an internal combustion engine is nothing more than an air pump. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. As with all other Pontiac V8 motors that evolved from the 316 V8, the 421 was simply a bored out and stroked version of the popular Pontiac 389 V8. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. 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. HP = flow at 28 in/H2O x 0.257 x # of cylinders. An evolution of the RA IV and H.O. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. Lobe separation angle: 112-deg Carb: (3) Rochester two-barrels PMD 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. 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. Sponsored Stories . The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. 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. 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. 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. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. For those who may not be familiar with the equation, here it is again: The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. The Block Date Code represents the production date of the engine. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. In 1968 the 326 was replaced by the similarly 389-derived 350, which used a 3+78in (98.4mm) bore and 3+34in (95.3mm) stroke for a total displacement of 353.8cuin (5,798cc). Tri-power engine rated at 376 hp. Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. 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. Even more powerful were the 421 Super Duty V8s that could produce up to 410 horsepower. . In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. 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. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. Price $14000.00. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . An example of data being processed may be a unique identifier stored in a cookie. (imp.) 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. [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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