There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. One of the key upgrades were the 6x4 heads. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor Prices ranged from $2,760 to $3,220 . Size cfm: Total flow, 1,050 cfm 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. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. The 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. 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. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. With higher compression and dual exhaust it produced 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 through 1967, its final year. A higher-output version was offered, called the 326 HO (High Output). aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. The premier SD 421 cylinder head was the late 1962-early 1963 casting #9771980 aka "980", featuring a larger 11.3cuin (185cc) intake port volume, flowing 230cuft/min (6.5m3/min) @ 28in (710mm). All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 1967 was the last year for closed-chambered heads. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? Once corrected the SD-455 was recertified and was released for production in late April 1973. Still, it was the strongest American engine offered that year. The concept car Pontiac Strato-Streak was used to introduce the V8 and in later years the engine was installed in Pontiac products. The 389 was the standard engine on the GTO up to 1966. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . 63 421 SD: 64: D-Port: 2.02/1.76: 77: 65 GTO, 65 421 HO: 65: D-Port: INTAKE MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65-79 HEADS. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Catalina Vista 421HO Trophy V-8 Tri-Power 4-speed in 1964 the model with 4-door hardtop sedan body and V-8 6902 cm3 / 421.2 cui, 276 kW / 375 PS / 370 hp (max) offered since October 1963 for North America U.S. special version. 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. 1966 Pontiac 2+2 $64,995. This may have been propagated by the only authorized company that is licensed to reproduce these decals not including the "6.6 LITRE" in the Trans Am decal kits, and only including "T/A 6.6" with no extra cost. Valves: Competition Products stainless steel, 1.92 /1.66-in 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). Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. Boost was wastegate limited to 91psi (0.6210.069bar). Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. 1968 Pontiac GTO 428 / Royal Bobcat. Manage Settings Learn how Classified Ads works . Maximum flow at 28 inches of water By comparison, the factory 421 H.O. / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . These muscle car profiles include photos and specifications for each model: For related car information, go to these articles: Please copy/paste the following text to properly cite this HowStuffWorks.com article: the Auto Editors of Consumer Guide The 428 was factory installed in large cars only. Collector size: 3.00-inGASKETS ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm Vacuum advance: Not usedEXHAUST It added '421' engine badges on the front fenders, 2+2 insignia on the deck lid and rear fenders, and simulated louvers behind the front wheel cutouts. 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. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). Free local pickup. 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. High output Pontiac V8 Cylinder Heads. cam specs out at 215/225-degrees duration at 0.050 and has just 0.407/0.407 lift with the factory 1.50:1 rockers. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. Pontiac produced the 421 V8 engine from 1961 to 1968. The 428 was increased to 456.12cuin (7,474cc) in 1970. Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. It featured the "744" 301/313 camshaft, which offered more duration and overlap than the "HO". Mods: Intake port match, valve bowl blend, improved short-turn radius 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. (imp.) Make way for one of the baddest muscle cars of all time, the, An all-aluminum, race-proven V-8 defined the rare and wicked, The engine is what gives a muscle car its flamboyant personality. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). Bolts or Parts: Lube or Sealer: Torque to: Main Caps. Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. For 1965, however, the 2+2 became a bonafide muscle car. 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. It's well documented that an internal combustion engine is nothing more than an air pump. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . Though production cars only got the two hood air inlets the name was retained. Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in The SD-455 used round-port cylinder heads similar to those used on the 1971 and 1972 455 HO, with specific "LS-2" intake and cast-iron exhaust header manifolds. The Ram Air IV used the Ram Air II's camshaft but lift in the Ram Air IV was increased to 0.52in (13mm) thanks to the use of 1.65 ratio rocker arms (vs 1.50). . However, in the June 1974 issue of SUPER STOCK AND DRAG ILLUSTRATED, a new 1974 Trans Am with the SD-455 motor ran 14.25 @ 101mph (163km/h). The crankshafts were also unique in the fact that they featured only two counter weights instead of the usual five and also featured lightened connecting rod journals. - P.B. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . Price $14000.00. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. The 1971 455 HO was rated at 335hp (250kW) @ 4,800rpm and 480lbft (651Nm) of torque @ 3,200rpm (gross). In 1969, Pontiac also used a revised crankshaft out of a Pearlitic malleable-iron, although it still used the "N" casting letter. Primary tube length: approximately 31.00 inches By comparison, the factory 421 H.O. . 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. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins Pontiac . 540306 featured 1.92/1.66-inch (49/42mm) valves and was carried over from the previous model year, production stopped in March 1962 and then casting No. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Valve guides: K-Line, liners The engines feature a cast-iron block and head and two valves per cylinder. By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. 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]. 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. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. The 421 SD Tri-Power engine offered during these years produced the highest horsepower of any motor in the Pontiac V8 lineup at 376 bhp. Engine displacement is a function of bore and stroke. . and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 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. 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. 1. Ellingson Motorcars (877) 638-7170. A three-speed stick was standard; a four-speed and automatic cost extra. Styling for Status. That's the factory rating of the legendary 421 H.O. The last was the 421 HO and included a high-output camshaft and valve train. Rocker arms: Crower roller, 1.6:1 A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. Information and specs for the Pontiac 421 V8 engine. Rated at 370 horsepower at 5,200 rpm and 460 pounds-feet of torque at 3,800 rpm, it has 10.75:1 compression, with induction through three Rochester two-barrel carbs, Pontiac's well-known "Tri-Power" setup. Optional power was the 421/356 with Tri-Power or the 421 HO putting out 376 horses with Tri-Power.
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