Valve seals: U.S. Seal Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. A new engine was fast-tracked, its relatively late start allowing it to take advantage of developments proven in the Oldsmobile V8 and Cadillac V8. By comparison, the factory 421 H.O. The 455 was used through 1976 when it, as with many other large displacement engines, was discontinued as manufacturers moved to smaller, more efficient models, even in their full size car lines. Beginning in 1967 casting nnumbers moved to the rear of the block just behind cylinder #8 . The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966. The compression ratio will be 10.6:1. Sponsored Stories . ][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. Diameter: 516-in 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. Free local pickup. 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. In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. 1965 Pontiac LeMans GTO Mecum. Some 400s were dealer installed. [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. 093: 66 389 GTO: 65 . Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). Plans were made to produce Firebirds and GTOs with advertised ratings of 355hp (265kW) and 375hp (280kW) respectively but concerns about emissions, the response of the automobile safety lobby, and the warranty implications of a high-revving street engine led to cancellation of the program.[why? The last was the 421 HO and included a high-output camshaft and valve train. In addition, a shallower spherical-wedge combustion chamber moved the tuliped valve heads .040" closer to the piston at TDC, improving mixture draw considerably during the intake stroke. The 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. Here are my top six rationales for admiring the 1966 GP. Piston pins: Icon, SAE 1016 to 1022 However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. All GTOs built from 1964-66 were powered by a 389-cubic-inch V-8 with 10.75:1 compression. The 428 was factory installed in large cars only. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). 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). designs, the SD-455 was a much improved engine. Piston-to-deck height: 0.009-in 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. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm 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. An evolution of the RA IV and H.O. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . The 1971 Pontiac 455 HO was Pontiac's first engine to receive a special 800cuft/min (23m3/min) Rochester Quadra-jet carburetor with specific jetting. By comparison, the factory 421 H.O. The last "true" Pontiac V8s, a 265 and 301cuin (4.3 and 4.9L), ended production in early 1981. The 301 Turbo was unique since it had a beefier block than the 197779 versions (which carried on in the non-turbo versions in 1980 and 1981), a very mild camshaft with 0.35in (8.9mm) lift and 250 degrees gross duration, a 60psi (4.1bar) oil pump to ensure adequate oil to the oil-cooled Garrett TBO-305 Turbocharger, a rolled fillet crankshaft, a fully baffled oil pan, and a specific 800cuft/min (23m3/min) Quadrajet carburetor. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. Head bolts do not pull on the cylinder wall causing distortion. The 421SD was available in 1961 as a dealer option or over the counter then in 62 and 63 from the factory, and was fitted with a list of internal modifications designed solely to withstand the abuse of drag racing. 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). ENGINE. 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). The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. For 1970 the Trans Am was the only Firebird available with the Ram Air IV, and 88 were produced during the abbreviated 1970 F-body production run. So large are the intake ports that the pushrods run through the center of each port via pressed-in tubes, in addition to streamlined airfoils over the tubes themselves to improve port shape, and increase flow velocity. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. 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. 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. Coil: GM During 19511952, Pontiac had 23 287cuin (4.7L) V8-equipped 1953 model production prototypes running tests on the GM proving grounds. The heads were a new design featuring siamesed intake ports. Mods: Intake port match, valve bowl blend, improved short-turn radius Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. 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). Regarding Crower's upgrade suggestions for its . 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. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. . Pontiac produced the 421 V8 engine from 1961 to 1968. 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. 18 watchers The Pontiac 301 EC (Electronic Controls) version offered in 1981 produced 155hp (116kW) and 245lbft (332Nm), although it's rumoured that the actual output was closer to 170hp (127kW). 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). The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. It also could hold its own against a range of performance cars. The valve angle was reduced from 17 degrees to 14 degrees for better breathing. Often called the "Ram Air III", this engine was officially called the "400 Ram Air" for 1969 and then simply "Ram Air" for the 1970 model year. Preparation: Install in rod, torque, measure ID 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Styling for Status. . Ellingson Motorcars (877) 638-7170. This was based on results of over 1 million test miles, which was unheard of at the time. Beginning in 1961 the Pontiac V-8 (389 and 421) was dubbed the Trophy V-8, due to its many victories in racing. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. 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". With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: or Best Offer. Primary tube diameter: 1.75-in 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. Two different cylinder-head castings were used for the 1962 model year, both with a combustion chamber volume of 68cc (4.15cuin) to produce an 11.0:1 compression ratio. 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. Unfortunately, that's what happened with the 1963 Pontiac Super Duty 421. 1966 Pontiac 2+2 $64,995. This was a project started with the end goal of building a 427 Hemi. With an identical bore and stroke of 4+116in (103.2mm) and 3+34in (95.3mm) it was precisely half the displacement of the 389 and shared numerous parts with the V8,[1] yet weighed considerably more than half as the engine lower half and block casting were not simply divided down the middle. Block description: '64 421ci #157 . Manage Settings Valvesprings: Crower, dual no damper Are you thinking of buying a 2007 muscle car, or any other car? moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". Two tri-power 421s were optional, one with 356 bhp, the other with 376. Oil pan: 8-quart with extended pick-up, fabricated retention clamp Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. [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. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. Pontiac Engine Torque Specifications. 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. 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. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. The short-deck block and different intake ports also required the design of a new intake manifold. Available only in the 1973 and 1974 Firebird Formula and Trans Am, the SD-455 consisted of a strengthened cylinder block that included 4-bolt main bearings and additional material in various locations for improved strength. For 1974 another 1,001 (943 Trans Am, 58 Formula) were built, after which the SD-455 was discontinued. All 1980 Trans Ams received this engine as standard with the option to delete this engine choice as a credit option for the standard L37 301. Ram Air induction was optional in the GTO, though power ratings were unchanged. Shipping to: 98837. While not related to the 400 W72, the concept was the same. The inlets were all well within the boundary layer that exists close to the surface, so all of these systems would more accurately be described as "outside air induction" systems, benefiting from the intake of cooler, and thus denser, outside air versus the comparatively hotter and less dense air under the car's hood. The 1968 Ram Air II remained at 400 cu. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. Horsepower: See Part 2 Mechanical advance: 36-deg at 3,200 rpm It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Low-performance and two-barrel applications, the standard engine in full-sized Pontiacs, got 1.96in (49.8mm) intake and 1.66in (42.2mm) exhaust valves and pressed in rocker arm studs. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. The 670 heads were used until May 1967 when they were upgraded to become the "97" heads, which were then replaced late in the model year by the "997" heads which incorporated the upgrades of the "97" heads. For 1971, Pontiac introduced another High Output (HO) version with standard internal parts, a reinforced block with four-bolt main bearing caps, and improved cylinder head design with 18-inch taller (3.2mm) intake ports and special round exhaust ports for better breathing, yet still making just 335hp (250kW) gross (or 310hp (231kW) in the more accurate SAE Net system). 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). Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". 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. Super Duty 421s were back, tougher than ever. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". 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 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. Both Randy and Stan were aware of the . . And it cruised silently and rode with less harshness than muscle intermediates. Information and specs for the Pontiac 421 V8 engine. The concept car Pontiac Strato-Streak was used to introduce the V8 and in later years the engine was installed in Pontiac products. The 421 was first availabe in a SD (Super Duty) model that was built for racing. 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 compartment of this concours Catalina is beautifully finished. Crank: Original '64 421 Spiral clip Engine Oil: 120 ft-lbs. The most valuable Pontiac GTO is the 1969 Judge convertible with the 370-hp Ram Air IV engine. 1969 - 400 Ram Air III or 350HO Code 48. Lifters: Crower solid with EDM oil hole (0.024 inch) 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. superior_queens (3,035) 100%. 1962 - 389 SD Code 544127. Compression Ratio: 10.6:1 effective Displacement began at 287-cubic-inch (4.7L) and grew as large as 455-cubic-inch (7.5L) by 1970. Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? Though never factory-installed in any car, the ultimate engine of the Ram Air line of engines was the tunnel-port Ram Air V. In 1969 Pontiac created four versions of the Ram Air V engine: a 303cuin (5.0L) short deck version for SCCA Trans-Am racing, a 366cuin (6.0L) variant for NASCAR, a 400cuin (6.6L) version for street use in GTOs and Firebirds, as well as a 428cuin (7.0L) adaptation for drag racing. It was factory rated at 366hp at 5,400 RPM and 445lbs.ft. . Preparation: Wash after balance for assembly Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. 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 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. A three-speed stick was standard; a four-speed and automatic cost extra. For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. Torque: See Part 2 A set of Hooker Super Comp headers will be used on the dyno, and Jim is porting the stock heads to increase intake-port flow by 30 cfm.
Michelle Gass Husband, Articles OTHER
Michelle Gass Husband, Articles OTHER