This test would tend to lend credence to the CAR AND DRIVER and HOT ROD tests of 1973 Super Duty cars with 3.42 gears, no air, and 160lb (73kg) less weight as being representative of production specimens capable of mid to high 13-second passes at 104mph (167km/h). Get the best deals on Engines & Engine Parts for 1966 Pontiac GTO when you shop the largest online selection at eBay.com. The 428 was increased to 456.12cuin (7,474cc) in 1970. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. For those who may not be familiar with the equation, here it is again: Both used a single two-barrel carburetor. 1963 Pontiac V8 Engine Specs. This was a project started with the end goal of building a 427 Hemi. 1966 Pontiac 2+2 $64,995. A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). 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 389 would remain the standard Pontiac V8 engine through 1966, offered in a bewildering variety of outputs ranging from 215 to 368hp (160 to 274kW). This was based on results of over 1 million test miles, which was unheard of at the time. Like the 421, the 428 used a large-journal crankshaft, but externally it was the same size as all Pontiac V-8s of that era (the later 301 used a shorter deck height). All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . If you enjoy the videos and would like to Sponsor me on Patreon, my Creator link is https://www.patreon.com/MyCarStoryWithLouOn "My Car Story" we're in Huntl. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". 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). 1966 yk 421 376 a 3x2 1967 zg 230 165 a 1 1967 zm 230 165 a 1 1967 zk 230 165 3 m 1 1967 zs 230 165 3 m 1 . The company says engines running this cam benefit from headers, cylinder-head port work, a large-cfm carb, and an ignition upgrade. [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. 1966 Pontiac Catalina . Collector size: 3.00-inGASKETS Mechanical advance: 36-deg at 3,200 rpm 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. Pontiac listed the 290hp (216kW) rating at 4000 rpm for a motor that had a 5700rpm redline on the factory tachometer. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. We and our partners use cookies to Store and/or access information on a device. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. Stating in 1962 the "421" and the "421 SD" engine became available as a factory option until 1966. 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. 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. Pontiac V8 Engine Tune-Up and Torque Specifications. All Rights Reserved. Only about 2000 like this one were built with 4 speed Muncie transmissions. Carb: (3) Rochester two-barrels PMD Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. Free shipping on many items | Browse your favorite brands | affordable prices. SPECIFICATIONS. By comparison, the factory 421 H.O. Sponsored Stories . The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. The 1979 W72/WS6 equipped Trans Am was considered to be one of the overall best performing cars of the decade due to having a powerplant that produced more power than any other competitor on the market at the time with handling equipment to supplement the performance.[12]. The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. Information and specs for the Pontiac 421 V8 engine. Factory heavy-duty high-pressure oil pump and eight-quart sump, four-bolt main bearing caps with Moraine aluminum bearings, and #1110976 dual-point distributor without vacuum advance. Only about 400 were produced before the fuel injection system was quietly dropped. This was the last run for the 455 (7.5 L) motor from Pontiac, and production ceased on the 455 this year as it could no longer meet the emissions requirements any longer. The 338-bhp four-barrel was the base engine. Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS SELLER Glendale, Arizona 85305. ][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. 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. This was a completely stock car on loan from a private owner for the test. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. Thus in March 1973 Pontiac eliminated a timing solenoid that gave full vacuum advance and disabled the EGR valve in high gear after a period of time that happened to exceed the running time of the EPA testing cycle. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. The stroke increased to 4.21-inch (106.9mm). [citation needed]. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . 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. 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. 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. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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 . 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]. Initial advance: 18-deg It also sports the four-speed manual, limited . Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. Offered from 1967 to 1969, it produced 360 and 376hp (268 and 280kW) in 1967, 375 and 390hp (280 and 291kW) in 1968 and 360,370 and 390hp (268,276 and 291kW) in 1969. 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. [citation needed]. Prices ranged from $2,760 to $3,220 . The 1972 455 HO was rated at 300hp (224kW) @ 4,000rpm and 415lbft (563Nm) @ 3,200rpm. Along with proper parts selection, accurate machining and assembly are also important. On the invoicing for the 1979 model year Firebirds, they had the option listed as L78, however, every 1979 400 equipped car received a W72 engine. Rocker arms: Crower roller, 1.6:1 engine, dual exhausts, three-speed manual transmission, Hurst shifter, 3.42:1 rear gears, heavy-duty suspension, bucket seats, upgraded upholstery, carpet, emblems, "Decor" louvers, pinstripes, lower . 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). 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. Compression jumped from 11.0:1 to 12.0:1, while other tweaks increased maximum shift points by 500 rpm, to a screaming 6400 rpm. To learn everything you need to know about car engines, see. Preparation: Weigh, soap-and-water wash Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. This money bought a potent 389 V-8 with 267-283 bhp . Casting number: 97770716, '64 date 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 389 was the standard engine on the GTO up to 1966. Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. In addition to the inline 6, Pontiac used the Oakland V8 for one year, 1932, debuting the Pontiac straight-8 engine in 1933. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. 068) to 301/313 (No. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. It was renamed 428 HO for 1968. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. Rings: LPC (Liberty Performance Components) premium moly, standard tension In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. Pontiac V8 Engine Tune Up Specifications. V-8 (coded WG for stick or YH for auto) was the 2+2's base engine. 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. In 1969, Pontiac unveiled its Trans Am model Firebird, and since racing rules required engines of less than 5L (305.1cuin), Pontiac unveiled the 303 for racing models only, never available to the public. 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". Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. or Best Offer. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. It had a four-barrel carburetor, dual exhaust, and higher compression, and was good for 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 - 1966 and the final year, 1967. Compression Ratio: 10.6:1 effective Modified versions of this engine were extensively used in NASCAR stock car racing and drag racing competition. Crank: Original '64 421 Royal Pontiac's engine swap wasn't a new trick for Pontiac. The base engine was the 421 four-barrel with 338 horsepower. 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. 1966 Pontiac Ventura Specifications. Engine Block Date Code. Engine Displacement: 432 ci Read. The 421 also marked the end of the option for a forged-steel crankshaft. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. Coil: GM pontiac engine decoder year code c/i hp tran carb car misc 1962 13b 421 3 m 2 x 4 full super duty 1962 13u 421 4 m 2 x 4 full super duty 1962 bu 421 4 m 2 x 4 full super duty . However, a few dealers would offer them in the GTO or Firebird and do their own installations, such as Royal Pontiac who offered the "Bobcat" conversion. 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. . All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. Primary tube length: approximately 31.00 inches It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. Pre-Owned. Oil pump: . It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. Along with being cheaper to build, this allowed more consistent valve action with less weight than a conventional shaft. Distributor: '61 Delco cast-iron with direct oiling . It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). Diameter: 516-in 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). 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). Fuel line size: 38-inch, 516-inch to carburetor By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. Update your shipping location. Bore/Stroke: 4.150/4.00-in Pontiac had prepared for the forthcoming cancellation of the venerable 400 by producing large volumes of the stronger cast "XX" 400 blocks in 1977 that were assembled in 1978, and stockpiled at a warehouse by the assembly plant for later use. [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. Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. Using an equation the author has provided in HPP many timesmost recently with The Mule engine seriesit was revealed that around 228.6-cfm flow though the intake port of the cylinder head is required to produce the desired 470 hp. Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. 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. The short-deck block and different intake ports also required the design of a new intake manifold. 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. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. The main upgrade for the engine was the ESC, (Electronic Spark Control)[15] which provided slightly more power at 170hp (127kW) with 4.9L (299cuin) for the 19801981 model years. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish The 421 badging was standard on the 2+2, the 421 H.O. Only 630 Bonnevilles were produced for 1957, all of them fuel-injected. in. It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. - P.B. Specifications listing with the performance factory . Unusual for a major automaker, Pontiac did not have the customary "small-block" and "big-block" engine families common to other GM divisions, Ford, and Chrysler. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . The first letter equals the month. Pontiac differed from other GM Divisions and most other manufacturers in producing only a single small block V8, rather than adding a larger big block to its line-up. 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. Pontiac did not release official power ratings for this engine, saying only that it had more than 300hp (224kW). He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. 093: 66 389 GTO: 65 . 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. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. Preparation: File-fit for end gap if needed, wash 744) and a new valve spring package with dampers to positively control valve action. 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. A mere five were built, all with a four-speed transmission. Final torque ratings may vary and need to be determined based on application and parts used. The next 1 or 2 numbers represent the date, and the last number is the year.
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