1966 pontiac 421 engine specs

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. Math, not gasoline, makes horsepower under the hood of a Pontiac. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). Pontiac Grand Prix - Muscle Car Club The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. Ever wonder what it would take to increase that number by 100? Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS 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. The single four barrel was rated at 333 bhp while the Tri-Power version carried a 348 bhp rating. In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. 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. Balancer: Original PMD rebuilt by Damper Doctor 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 first letter equals the month. 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. A mere five were built, all with a four-speed transmission. Diameter: 516-in From 1969 though 1970, the Ram Air IV was available in both A-Body (GTO, including Judge) and F-body (Firebird, including Trans Am) form. The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). 744) and a new valve spring package with dampers to positively control valve action. Rings: LPC (Liberty Performance Components) premium moly, standard tension Bore/Stroke ratio: 1.04:1 Torque: See Part 2 Stock Pontiac Engine Specs. This 1966 Pontiac 2+2 Convertible is a beautifully restored big-block convertible that is ready for some boulevard cruising! ", https://tran-zam.com/fhistory/1977Engines.aspx, "Hitman's Pontiac Trans Am Site - WS6 and WS7", https://tran-zam.com/fhistory/1978Engines.aspx, https://tran-zam.com/fhistory/1975Engines.aspx, "Unsung Muscle: '75 455 HO Pontiac Trans Am", https://tran-zam.com/fhistory/1981Engines.aspx, "Directory Index: Pontiac/1967 Pontiac/1967_Pontiac_Performance_Brochure", "609ci Pontiac Ram Air V - Chief Stomp 'Em", Pontiac experimental V8 427 Hemi TOHC Tamrazs Parts (800) 442-4601, "McKellar's Masterpiece: The Pontiac Overhead Cam 421 V8", https://en.wikipedia.org/w/index.php?title=Pontiac_V8_engine&oldid=1136467635, Articles needing additional references from January 2010, All articles needing additional references, Articles that may contain original research from October 2016, All articles that may contain original research, Articles needing cleanup from September 2022, Articles with bare URLs for citations from September 2022, All articles with bare URLs for citations, Articles covered by WikiProject Wikify from September 2022, All articles covered by WikiProject Wikify, Articles with multiple maintenance issues, Articles with unsourced statements from December 2008, Articles with unsourced statements from April 2021, Articles with unsourced statements from February 2018, Wikipedia articles needing clarification from April 2021, Articles with unsourced statements from July 2016, Articles that may contain original research from September 2018, Articles with unsourced statements from March 2018, Articles to be expanded from February 2020, Articles with empty sections from February 2020, Creative Commons Attribution-ShareAlike License 3.0, 7.9:1, 8.0:1, 8.4:1, 8.5:1, 8.6:1, 8.9:1, 10.0:1, 10.25:1, 10.5:1, 10.75:1, 11.0:1, Two-barrel carburetor, 7.9:1 compression, 192hp (143kW) @ 4400rpm, 297lbft (403Nm) @ 2800rpm, Four-barrel carburetor, 8.9:1 compression, 216hp (161kW) @ 4800rpm, 315lbft (427Nm) @ 2800rpm, Two-barrel carburetor, 8.9:1 compression, 205hp (153kW) @ 4600rpm, 294lbft (399Nm) @ 2600rpm, Four-barrel carburetor, 8.9:1 compression, 227hp (169kW) @ 4800rpm, 312lbft (423Nm) @ 3000rpm. High output Pontiac V8 Cylinder Heads. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. The engines feature a cast-iron block and head and two valves per cylinder. Super Duty 421s were back, tougher than ever. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. 1966 Pontiac Gto Glendale, Arizona | Hemmings Pontiac 2+2 - Wikipedia A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. - P.Top - Correct Exterior/Interior. 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 . [citation needed]. He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. 1965 Pontiac Grand Prix with a 421 Tri-Power engine - YouTube Cam was a #541596 McKellar No. A higher-output version was offered, called the 326 HO (High Output). All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. Stating in 1962 the "421" and the "421 SD" engine became available as a factory option until 1966. For 1967, Pontiac retired the 389cuin (6.4L) and replaced it with the 400cuin (6,554cc), a 389 bored-out by +0.06in (1.5mm) to a bore and stroke of 4.12in 3+34in (104.6mm 95.3mm). 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. said the "Pontiac 421 cu. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. 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 Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. 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. This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. HP = flow at 28 in/H2O x 0.257 x # of cylinders. The compression ratio will be 10.6:1. 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. Pontiac Engine Torque Specs - Butler Performance 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. The 1955-up Pontiac V8 that finally reached the public was an overhead valve engine with cast iron cylinder heads and block and wedge-shaped combustion chambers. It was rated at 250hp (186kW) with 8.6:1 compression and 260hp (194kW) at 10.25:1 compression. Vacuum advance: Not usedEXHAUST Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. McKellar's Masterpiece: The Pontiac Overhead Cam 421 V8 The Fresh Air package continued into the 1966 model year. Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. As Stock drag racing heated up at the dawn of the Sixties, the factories were serving up a constant stream of engines, transmissions and lightweight body par. 1966 Pontiac Catalina . 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. 1966 Pontiac Catalina 421 H.O. Gives New Meaning to the Term 'Full Floater' Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. Bore/Stroke: 4.150/4.00-in Math, not gasoline, makes horsepower under the hood of a Pontiac. Engine displacement is a function of bore and stroke. Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). Carb: (3) Rochester two-barrels PMD 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 . It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. SELLER Glendale, Arizona 85305. pontiac 421 complete engine for sale | eBay Unlike previous enlargements of Pontiac V8s, it did not replace the 389. 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. Ellingson Motorcars (877) 638-7170. 287. 1965 Pontiac Bonneville Convertible | Hemmings The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. 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. The SD-455 motor was listed as an option in dealer brochures for the 1973 Grand Am and LeMans GTO(and planned for the Grand Prix as well) although none were produced for sale. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. 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. Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . It featured 3+14in (82.6mm) main journals (which the legendary Smokey Yunick reputedly left Pontiac's engineering department over). Preparation: File-fit for end gap if needed, wash Head ID Location Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. Some 400s were dealer installed. [19], Parts for Ram Air V engines are not readily available. The short-deck block and different intake ports also required the design of a new intake manifold. VEHICLE TYPE . For the truly obsessed, 16 Grand Prixs were built with Pontiac's 421 Super Duty engines, rated at a staggering 370 bhp. This was to ensure there was enough fuel to cool the cast offset dished pistons. For 1974 another 1,001 (943 Trans Am, 58 Formula) were built, after which the SD-455 was discontinued. Like the 326, it was offered in both 2-barrel and 4-barrel versions. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). The Pontiac Tri-Power Story | Mac's Motor City Garage Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. All GTOs built from 1964-66 were powered by a 389-cubic-inch V-8 with 10.75:1 compression. 4/21: Not just a date, but a legendary 421-cid Pontiac engine that The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. Centerline: 110-deg 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). The 1975 455 HO package received some negative press/reviews as some buyers expected to see a return of the 1971-1972 engine, and were disappointed when they received the lower output motor. 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. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. Whether all were installed in GTOs is unknown. By 1963 Pontiac decided it was time to 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. 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. 1962 421 super duty motor Price $30000.00. 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 . ][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. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. All Rights Reserved. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. For 1969-1970 GTO the 400 HO included driver operable Ram Air induction and was renamed "400 Ram Air" for 1969 and just "Ram Air" for 1970. 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. Also bowing in 1967 was the new Firebird, which had the . The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. In 1968, a 320hp (239kW) HO option was offered in the Tempest and Firebird. 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. During 19511952, Pontiac had 23 287cuin (4.7L) V8-equipped 1953 model production prototypes running tests on the GM proving grounds. 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. Length: 8.750-inCAM Setting initial timing at idle with the vacuum advance disconnected will usually fall around 12 to 16 degrees, but that's not really important. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . The 2+2 package was first offered as a $291 option on Catalina hardtops and convertibles in 1964. The 400 2-barrel kept the 17 degree valve angles for '67; starting in '68 all Pontiac V8s went to the 14 degree valve angle. Tested: 1968 Pontiac GTO 428 / Royal Bobcat - Car and Driver Regarding Crower's upgrade suggestions for its . 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). Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore 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. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). 1966 Pontiac GTO. The Ram Air II also incorporated the first computer-designed camshaft. 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. It tips the scales at 3,950lbs. The air cleaners look like those used on the top dog 376 gross HP 421 CI engine but there was also a lesser 356 HP version available too. Pontiac V8 Engine Codes and Specs - WOW Muscle Cars 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 1981 301 Turbo gained the electronic controls with an O2 sensor, feedback ECM and E4ME Quadrajet providing a slight reduction in output to 205hp (153kW) and 340lbft (461Nm).The 301 Turbo was limited to Trans Am and Formula Firebird production only. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. The 421 SD Tri . 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. Manage Settings engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . Melling PN M54D with 60 psi spring, made 70 psi at 6,000 rpm with 30W oil Wires: NAPA Belden 7 mm An example of data being processed may be a unique identifier stored in a cookie. A History Lesson in Pontiac V8 Power - Engine Builder Magazine Oil pan: 8-quart with extended pick-up, fabricated retention clamp This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. 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). Get the best deals on Engines & Engine Parts for 1966 Pontiac GTO when you shop the largest online selection at eBay.com. RamAir 4 Motor Price $15500.00. Now select an engine model (if applicable) -- Pontiac Engine Models -- All Pontiac Kits 151 301 326 350 3800 389 4-cylinder 400 421 428 455 Brodix Heads Edelbrock Heads Iron Duke L67 Pro Stock Dart Heads Pro Stock Heads Ram Air Runner Heads Super Duty Generic V8. On premium fuel, it was rated at 207 hp at 5200 rpm and . "Armasteel" was a trademark of pearlitic malleable iron developed by GM's Saginaw Metal Casting Operations around 1936, which was referred to as "locking ball" cast-iron, as opposed to the "flaking" type found in other engines. From 1959 to 1966 Pontiac continues making improvements. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. 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 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. Engine Oil: 95 ft-lbs. Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. 1966 Pontiac Ventura Specifications. Pontiac's SCCA Trans-Am program was promising, with race-ready engines producing 475hp (354kW) to 525hp (391kW), however the series General Competition Rules required the manufacturer to produce no less than 250 vehicles with the 303. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . Deck Height: 10.215-in The XS-code 389 was still rated at 360bhp at 5,200 rpm, same as the more common WS-coded Tri-Power 389, but performance was noticeably improved on acceleration runs. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. Pontiac introduced the OHC 6 in two flavors for '66: a base engine with a one-barrel carburetor that developed 165 hp at 4700 rpm, and a sportier version with a 10.5:1 compression ratio, a high-lift cam, a split exhaust manifold, and GM's new four-barrel Quadrajet carburetor (below). The earlier 1975-78 blocks had metal shaved from the journals and bottom end as well as a decrease in the nickel content of the block in an attempt to decrease the overall weight of the vehicle to help alleviate emissions and cost. The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966. Spiral clip 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. The 1971 455 HO was available in the Firebird (optional in Formula; standard in Trans Am), the GTO (standard with "The Judge" package), and the 2-door LeMans, LeMans T-37 (including GT-37), and LeMans Sport. 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. Fuel line size: 38-inch, 516-inch to carburetor 1962 - 389 SD Code 544127. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm For a few more ponies through better oil control, a factory full-length windage tray will be added, since Pontiac didn't use one on this engine originally. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. Rod/Stroke ratio: 1.65:1BOTTOM END like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. 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. 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. Six reasons to revere the 1966 Pontiac Grand Prix | Hemmings By comparison, the factory 421 H.O. The 421 SD became factory installed in 1962 and in 1963 a street version became available from the factory with a dual four-barrel or three two-barrel Tri-Power carburetion. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. 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. With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: Open pressure: 282 pounds at 1.100-in 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). Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. Bolts or Parts: Lube or Sealer: Torque to: Main Caps. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. 1963 Pontiac Super Duty 421: A Profile of a Muscle Car - HowStuffWorks Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. But the "Ram Air" 400 also mandated steep 4.33:1 gears(or 3.90:1 in Firebird), making the Quadra-Power 400 (400 HO) the top practical street engine option for most drivers. In 1967, the Pontiac 2+2 became an option on the . 421 Tri-Power/Hurst 4-Speed: 1966 Pontiac 2+2 | Barn Finds Angles used in valve job: 30-deg intake, 45-deg exhaust seat, width 0.040-in intake, 0.060-in exhaust 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). There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8.

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