2022.08.24 WednesdayThat's the factory rating of the legendary 421 H.O. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). In the early '60s, the engine program at the Pontiac division of General Motors was a wide-open operation that bustled with innovation. The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. 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. Here are features on more than 100, Muscle cars created their own culture. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. Type Size Carb Horse Power Tourqe; Tri-Power: 389ci: 3x2bbl: 360 hp @ 5200 rpm: 424 lb-ft @ 3600 rpm: Base 8 . Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. [7] Though listed as slightly less powerful than some high-performance iterations of the 400 (such as the 366hp (273kW) Ram-Air), the 455 had 500lbft (678Nm) of torque, 55 more lbft (75Nm). . The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). 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. It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. Simply put, what good is the power if the engine does not last? Head bolts do not pull on the cylinder wall causing distortion. 1966 Pontiac Catalina technical specifications and data. 1966 Pontiac GTO. Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. 1962 421 super duty motor Price $30000.00. It's well documented that an internal combustion engine is nothing more than an air pump. Casting number: 97770716, '64 date . 1968 Pontiac GTO 428 / Royal Bobcat. in., again available only in the GTO and Firebird. The first letter equals the month. 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 base engine was the 421 four-barrel with 338 horsepower. 301 2-barrel (135hp, 101kW), (5th character of the, 301 4-barrel (150hp, 112kW), (5th character of the. superior_queens (3,035) 100%. Pontiac RAIII/IV Engine parts collection Price $14000.00. . It was removed from the design for the 1960 model year because designers moved the generator and the power steering pump from atop the front of the engine down to the front of the heads to accommodate a lower hoodline. There were a few 1962 Grand Prix models that came with a 421 SD from the factory so if someone is lucky enough to have one today then they have a car that is probably worth some decent money simply because of the rarity of these models.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[580,400],'enginefacts_com-medrectangle-3','ezslot_2',115,'0','0'])};__ez_fad_position('div-gpt-ad-enginefacts_com-medrectangle-3-0'); Engine Facts 2023. The Fresh Air package continued into the 1966 model year. Super Duty 421s were back, tougher than ever. The 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. Pontiac V8 Engine Tune-Up and Torque Specifications. Both Randy and Stan were aware of the . Diameter: 516-in In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). What was most interesting about the 421 engine in the beginning was that it was a dealer installed option only known as the SD (Super Duty) 421. The heart of the build, a code 45B 1964 421 HO 370 HP manual trans 4-bolt main block, all Pontiac 421 engines without exception had 4-bolt main caps. 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. 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. Specifications listing with the performance factory . Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Piston-to-deck height: 0.009-in Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. It also sports the four-speed manual, limited . Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? This chart covers Pontiac V8 Engines; 265, 301, 326, 350, 389, 400, 421 . 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. 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. Rocker arms: Crower roller, 1.6:1 This was a completely stock car on loan from a private owner for the test. With the 1964-1967 Pontiac Catalina 2+2, Pontiac achieved a combination of power, road-holding, and fine styling superior to any other big Pontiac, and most of the competition's models besides. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. We and our partners use cookies to Store and/or access information on a device. said the "Pontiac 421 cu. For 1974 another 1,001 (943 Trans Am, 58 Formula) were built, after which the SD-455 was discontinued. Paul Stenquist. Final torque ratings may vary and need to be determined based on application and parts used. Mechanical advance: 36-deg at 3,200 rpm This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . 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. Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. Two tri-power 421s were optional, one with 356 bhp, the other with 376. 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. Forged steel 6.625in (168.3mm) rods (Ram Air V style), Large-valve heads (valve diameter): 2.4in (61mm) intake, 2in (51mm) exhaust, Small-valve high-RPM head (valve diameter) 2.19in (56mm) intake, 2in (51mm) exhaust. The block is still at standard 421 bore size (4.09375") and will be bored to fit standard size forged 428 pistons (4.120"). Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. RamAir 4 Motor Price $15500.00. 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. Prices ranged from $2,760 to $3,220 . Along with proper parts selection, accurate machining and assembly are also important. 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). A limited-slip differential and gearing up to 4:11.1 were optional. While not related to the 400 W72, the concept was the same. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. 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. From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. . Once corrected the SD-455 was recertified and was released for production in late April 1973. Modified versions of this engine were extensively used in NASCAR stock car racing and drag racing competition. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). From a performance perspective, the 2+2 is pretty impressive. Pontiac offered this to the public as a streetable version of the 421 SD. This was to ensure there was enough fuel to cool the cast offset dished pistons. Whether all were installed in GTOs is unknown. 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. . Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. . This same camshaft was also used in Pontiac's 19691970 RA IV production cars. During 19511952, Pontiac had 23 287cuin (4.7L) V8-equipped 1953 model production prototypes running tests on the GM proving grounds. 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. From 1959 to 1966 Pontiac continues making improvements. [citation needed] It was the first engine that incorporated Pontiac's round-port head design in a production vehicle, however the intake port was the same as other D-port heads, leaving a head which exhaust port could nearly match the intake at high valve lifts. Read. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Price $30000.00. Transistorized ignition was available. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. Collector size: 3.00-inGASKETS 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. Upon reflection, many did not consider that it was the only large displacement engine still on offer for any performance car on the market, and reconsidered Pontiac's position between the rising CAFE emissions restrictions.[14]. Torque: See Part 2 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. Retainers: Crower steel [9], The W72 engine was standard in all 1977 Pontiac Can Ams (bar the 1977 Can Ams sold in California/High Altitude states which received the L80 Oldsmobile 403) and was optional in all 1977-79 Pontiac Firebird Formula and Trans Am models. When Robert Critchfield took over as general manager in 1952, he launched an ambitious plan to move Pontiac into the upscale, mid-range market occupied by Oldsmobile, and that demanded V8 power. Duration at .050: 247/252-deg Pontiac produced the 421 V8 engine from 1961 to 1968. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. Distributor: '61 Delco cast-iron with direct oiling 5 January 2007. 1969 - 400 Ram Air III Code 62. However, the engine used in these Trans Ams was the same regular production 455 taken from the big body cars Pontiac was producing, and output 200 HP with a torque rating of 330lbft at 2,000 rpm.[13]. This new material had stronger alloys in the iron. The other major difference between the "typical" Pontiac engine of the time was that this one used the large . designs, the SD-455 was a much improved engine. To learn about it, read. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. Shipping to: 98837. The 421 badging was standard on the 2+2, the 421 H.O. The shaker wore the decals "455 H.O." Are you thinking of buying a 2007 muscle car, or any other car? Spiral clip Only 630 Bonnevilles were produced for 1957, all of them fuel-injected. 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. First offered as an option in 1963, the 421 HO came in a 4-barrel engine of 320hp (239kW) and one Tri-Power H-O version with a hotter cam and efficient iron exhaust manifolds and rated at 370hp (276kW). Preparation: Weigh, soap-and-water wash Besides a variety of displacements, the Pontiac V-8 block saw a number of other changes over the years, including starter locations, main-journal diameters, engine-mounting points, and . Some 400s were dealer installed. (V8) - Stamped on right front side of block or beneath production . Initially marketed as a 287cuin (4.7L), it went on to be manufactured in displacements between 265cuin (4.3L) and 455cuin (7.5L) in carburated, fuel injected, and turbocharged versions. Sponsored Stories . One version of the engine featured camshafts driven off the front of the engine, another design had the cams driven by gears off the back of the engine. 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. 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 four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . Optional engines included the 356hp Tri-Power as seen on our feature car (code WH manual or YJ auto), or the 421HO, rated at 376hp .
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