Along with the HO it also had Pontiac's famous cast-iron "headers", which were much better at reducing backpressure than the regular manifolds. 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. Fuel pump: Will use 110-gph Carter Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). Intake: 218 cfm at 0.500-in The SD-389 was limited to a single 4-barrel while the SD-421 used dual 4-barrels. A larger 4in (101.6mm) ram air flex duct to the air cleaner from the left-hand fender, specific carburettor calibration for the Rochester Quadrajet, a "T/A 4.9" callout on the shaker, 60 psi oil pump, and cam similar in grind to the 220hp (164kW) 400 from the 19781979 model year were also included. All 1977-1978 Trans Ams ordered with the 4-speed Borg Warner Super T-10 manual transmission received the W72 T/A 6.6 engine. Rear Main Cap. 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. All GTOs built from 1964-66 were powered by a 389-cubic-inch V-8 with 10.75:1 compression. "1966 Pontiac 2+2" The shaker wore the decals "455 H.O." Are you thinking of buying a 2007 muscle car, or any other car? 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. 1966: 421: 9782611 (late) 1967-1969. . 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]. in. aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. 1962 421 super duty motor Price $30000.00. [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 1972 455 HO was rated at 300hp (224kW) @ 4,000rpm and 415lbft (563Nm) @ 3,200rpm. 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. Though airflow is paramount in making power, there are other aspects of the engine that are just as important. Pushrods: LPC chrome moly An evolution of the RA IV and H.O. The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. - P.Top - Correct Exterior/Interior. Ever wonder what it would take to increase that number by 100? Splayed main caps, head bolts tie into main caps. In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). 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. Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. A panel covers the dash opening where the radio would have been on a standard Catalina. Note the tri-color Pontiac Ventura upholstery. There was also the addition of dual exhaust, and for vehicles equipped with a manual transmission, a slightly more aggressive camshaft. Engine Block Date Code. Every torque specification should be in this table, however if there is one missing, please Contact Me and I will get you the spec and add it to the table. 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 . 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". Open pressure: 282 pounds at 1.100-in Pontiac produced the 421 V8 engine from 1961 to 1968. ", 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. However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore 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). 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. However, the RA II was limited to a 1.50:1 rocker ratio, while the RA IV used a 1.65:1 ratio, which yielded significantly greater total lift and, therefore, superior flow and power. As a result, it was remarkably free of teething problems. The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). The engines feature a cast-iron block and head and two valves per cylinder. In 1967, the Pontiac 2+2 became an option on the . It shared the 389's 3+34in (95.3mm) stroke, but its bore was 3.78in (96.0mm) for a displacement of 336.66cuin (5.5L). Email Email. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". Melling PN M54D with 60 psi spring, made 70 psi at 6,000 rpm with 30W oil While not related to the 400 W72, the concept was the same. Size cfm: Total flow, 1,050 cfm Unlike previous enlargements of Pontiac V8s, it did not replace the 389. The four-barrel 400 was a popular performance option for many of Pontiac's cars. Retainers: Crower steel 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. 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. In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. For those who may not be familiar with the equation, here it is again: 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. Method used to retain pins in pistons: . 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. In 1973 a further refined and even stronger but less powerful version, the Super Duty (SD) engine, was planned for Firebird, Grand Am, Le Mans (GTO), and Grand Prix models. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor Continue with Recommended Cookies. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. 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. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. The L75 455 engine continued as an option into the 1976 model year for the Trans Am, however, Pontiac opted to drop the "H.O." Primary tube diameter: 1.75-in The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. Casting number: 97770716, '64 date Pontiac first offered three two-barrel carburetors in 1957 and the Tri-power set up was an option on the GTO from 1964-66. Pre-Owned. It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. He thinks the stock exhaust flow of 180 cfm will suffice for this build. All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 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). 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. 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). 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. Math, not gasoline, makes horsepower under the hood of a Pontiac. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". Royal Pontiac's engine swap wasn't a new trick for Pontiac. In 1969, Pontiac also used a revised crankshaft out of a Pearlitic malleable-iron, although it still used the "N" casting letter. Setting initial timing at idle with the vacuum advance disconnected will usually fall around 12 to 16 degrees, but that's not really important. The short-deck block and different intake ports also required the design of a new intake manifold. It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. 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. 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. This was based on results of over 1 million test miles, which was unheard of at the time. Final torque ratings may vary and need to be determined based on application and parts used. None of Pontiac's Ram Air engines actually enjoyed any true ram air effect. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. The Ram Air IV heads had 1/8" taller intake ports, larger intake port volume with more airflow, yet shared the Ram Air II round exhaust ports. Pontiac Engine Torque Specifications. By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. The code consists of 3 or 4 digits. The 1972 455 HO was available in the Firebird (optional in Formula; standard in Trans Am) and 2-door LeMans (including those with the GTO option) and LeMans Sport convertible. (imp.) Piston pins: Icon, SAE 1016 to 1022 Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. Ellingson Motorcars (877) 638-7170. 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. Piston-to-deck height: 0.009-in Most likely prompted by its development of the Pontiac OHC six, the GM division built three different experimental SOHC 421 CID V8 engines in the early 1960s. 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. Boost was wastegate limited to 91psi (0.6210.069bar). 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 . Collector size: 3.00-inGASKETS Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. 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. . 1966 Pontiac Catalina Specifications and Production. . Along with being cheaper to build, this allowed more consistent valve action with less weight than a conventional shaft. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified engines. It included a new camshaft with duration increased from 288/302 (No. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. Pontiac V8 Engine Tune Up Specifications. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS 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]. like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. Installed position: 110-deg Bore/Stroke: 4.150/4.00-in Model Number: Body/Style Number: Body Type & Seating: Factory Price: . "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. 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 421 SD produced up . Rings: LPC (Liberty Performance Components) premium moly, standard tension Duration at .050: 247/252-deg Styling for Status. Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. An HO version could be ordered in the GTO, as GM had lifted its restrictions on offering engines larger than 400cuin (6.6L) in mid-sized cars (resulting in the 454 (7.44) Chevrolet Chevelle, Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. Pontiac listed the 290hp (216kW) rating at 4000 rpm for a motor that had a 5700rpm redline on the factory tachometer. 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. ][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 1966 Pontiac Ventura doesn't necessarily come up when speaking of 60's muscle cars, but the type of V-8's offered with the Ventura meant plenty of power. Pontiac V8 Engine Codes and Specifications. The Fresh Air package continued into the 1966 model year. This money bought a potent 389 V-8 with 267-283 bhp . HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. As Pontiac's 1967 performance brochure said, "You can add the Ram Air induction hood scoop and new high output cam and valve springs to the Quadra-Power 400 for better top end breathing." It was factory rated at 366hp at 5,400 RPM and 445lbs.ft. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. 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). 1963 Pontiac V8 Engine Specs. The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. 1967 - 400 Ram Air Code 97. Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. designs, the SD-455 was a much improved engine. It had 2-bolt main bearing caps in 1969, but went to a block similar to the Ram Air IV's in 1969 that was drilled for 4-bolt main bearing caps (but used a cast crank and cast rods). Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula).
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