[5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. Displacement began at 287-cubic-inch (4.7L) and grew as large as 455-cubic-inch (7.5L) by 1970. For 1967 only Pontiac called this engine the Quadra-Power 428. Pontiac in the 1950s was one of a few US manufacturers that did not regularly identify their engine names and sizes with air-cleaner or valve-cover decals. In the Firebird Ram Air induction for the 400 HO was a separate option for 1969(included with Trans Am) and included with the engine(optional in Formula; included with Trans Am) in 1970. 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 . superior_queens (3,035) 100%. The Fresh Air package continued into the 1966 model year. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. The Block Date Code represents the production date of the engine. Along with proper parts selection, accurate machining and assembly are also important. Bore/Stroke ratio: 1.04:1 Here are features on more than 100, Muscle cars created their own culture. Continue with Recommended Cookies. Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. A three-speed stick was standard; a four-speed and automatic cost extra. 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 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. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). 068) to 301/313 (No. Next time we will cover the induction system and the dyno testing to see if Jim meets his goal. This resulted in a lightweight design weighing less than the Chevrolet small-block V-8. 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. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). Spiral clip High output Pontiac V8 Cylinder Heads. Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. The 421 was first availabe in a SD (Super Duty) model that was built for racing. Maximum flow at 28 inches of water It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Standard ratio with the 400 was 3.55:1(except 3.36:1 in Firebird for 1969) regardless of transmission(3.23:1 for cars with air conditioning). Length: 8.750-inCAM 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 engines feature a cast-iron block and head and two valves per cylinder. Block description: '64 421ci #157 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." It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. Deck Height: 10.215-in Primary tube length: approximately 31.00 inches 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. 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. The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. 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 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. The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. According to the June 2019 issue of Muscle car Review magazine, during dyno testing performed during that era, the National Hot Rod Association (NHRA) rated this Pontiac W72 400 T/A 6.6 engine at 260 to 280 net horsepower instead of the 220-hp rating published by Pontiac. Initial advance: 18-deg 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). Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. 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 began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. Unfortunately, that's what happened with the 1963 Pontiac Super Duty 421. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. Are you thinking of buying a 2007 muscle car, or any other car? 1966: 421: 9782611 (late) 1967-1969. cam specs out at 215/225-degrees duration at 0.050 and has just 0.407/0.407 lift with the factory 1.50:1 rockers. and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). Rear Main Cap. The next 1 or 2 numbers represent the date, and the last number is the year. Other dimensional factors such as the wheel base, curb weight and length were largely unchanged. The last was the 421 HO and included a high-output camshaft and valve train. 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. Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. Bearings: Sealed-Power mains and rods, cam Dura-Bond All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 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 two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. Cam was a #541596 McKellar No. Pontiac V8 Engine Codes and Specifications. 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. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. In 1967, the Pontiac 2+2 became an option on the . Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. ENGINE. Ram Air induction was optional in the GTO, though power ratings were unchanged. Paul Stenquist. cam specs out at 215/225-degrees duration at 0.050 and has just 0.407/0.407 lift with the factory 1.50:1 rockers. With a view to the latter, what we find lurking under the hood is the 421ci Tri-Power V8. . Torque: See Part 2 The W72 301 was a tuned L37 301 Pontiac V8 with some minor upgrades. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. The Armasteel cast crankshaft was the standard hardened cast-iron crankshaft used throughout the entire Pontiac V-8 line until 1967. It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. Bolts or Parts: Lube or Sealer: Torque to: Main Caps. 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. The engine was available in all full-size Pontiacs. The 2-barrel version was last offered in 1979. Muscle Cars. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). Beginning in 1967 casting nnumbers moved to the rear of the block just behind cylinder #8 . For those who may not be familiar with the equation, here it is again: Compression Ratio: 10.6:1 effective 301 4-barrel 'W72' or 'ESC' (170hp, 127kW) (with the 5th character of the VIN being a "W" for 1979-1980 and the 8th for 1981). [citation needed]. SPECIFICATIONS. Reductions in reciprocating weight free up horsepower. All Rights Reserved. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Wires: NAPA Belden 7 mm The 1981 rendition of this engine was officially called the 301-EC [EC standing for Electronic Controls] in the 1981 GM factory service manual, removing the need for a W72 option separately as it was now the standard motor, similar to how all W72 engines in 1979 were coded L78.[16]. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. 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. Year: CU IN: Casting # 1967: 326. The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. This was based on results of over 1 million test miles, which was unheard of at the time. 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. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Sponsored Stories . This chart covers Pontiac V8 Engines; 265, 301, 326, 350, 389, 400, 421 . Total Timing: 36-deg BTDC The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number. The goal of making a Pontiac Hemi succeeded but the engine was never produced. The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. Federal emissions standards and the drive towards "corporate" engines shared among all GM divisions led to the progressive demise of the Pontiac V8 through the late 1970s. Simply put, what good is the power if the engine does not last? Here is another number to ponder: 370 hp. The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . 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. 1966 Pontiac Catalina Specifications and Production. This installment includes the assembly and parts selection up to the long-block. Tri-power engine rated at 376 hp. 1968 - 400 Ram Air II Round Port Code 96. 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. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. Vacuum advance: Not usedEXHAUST He thinks the stock exhaust flow of 180 cfm will suffice for this build. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. Though a change of camshaft would delay production, Pontiac decided to change camshaft, employing one with identical timing to the 744 camshaft, which had been used in the 400 Ram Air(aka Ram Air III) engine with manual transmissions. 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. Given how late in the model year it was, Pontiac decided not to incur the costs of recertifying the SD-455 for other models other than the Firebird. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. The Pontiac 2+2 is a full size automobile that was manufactured by Pontiac, built on the B-body chassis.It debuted for the 1964 model year as a trim-only option for the Pontiac Catalina, with special door panels, bucket seats with a center console, and exterior badging.Pontiac marketed the 2+2 as the "big brother" to the popular Pontiac GTO.. Beginning in 1965 the name Catalina was no longer . Rocker studs: ARP special 34-in bottom The concept car Pontiac Strato-Streak was used to introduce the V8 and in later years the engine was installed in Pontiac products. 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. Price $30000.00. Pontiac RAIII/IV Engine parts collection Price $14000.00. 1966 Pontiac Ventura Specifications. This included the ESC (Electronic Spark Control) distributor and controller borrowed from the 301 Turbo, which allowed for higher timing without the penalty of engine damaging pinging or preignition. The 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. The 421 also marked the end of the option for a forged-steel crankshaft. 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. Headers: Hooker Super Comp (for dyno test) In 1968, there was also a 350 "HO" which had increased power with the addition of higher compression #18 heads (#17 and #46 were the most common 2-barrel heads), a four-barrel carburettor and matching intake that was also used on the 400 and 428 engines. 3.75. Seat pressure: 110 pounds at 1.600-in 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. These motors were built mainly for NASCAR or other racing purposes and were equipped with all the extra racing goodies that people were looking for. This was the only Poncho with standard 421-cid power. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the 455 engine, it was re-introduced mid-year as an available option for the 1975 Pontiac Trans Am. Whether all were installed in GTOs is unknown. The engine build will be discussed in two parts. Valves: Competition Products stainless steel, 1.92 /1.66-in 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. Like the 326, it was offered in both 2-barrel and 4-barrel versions. Royal Pontiac's engine swap wasn't a new trick for Pontiac. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. Size cfm: Total flow, 1,050 cfm For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. The engines feature a cast-iron block and head and two valves per cylinder. They came up with a 269-cubic-inch (4.4L) L-head design. Preparation: Wash after balance for assembly All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. 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. . The tri-power equipped XS-code 389 was shipped with the Ram Air pan in the trunk, and the dealer had to fit it and cut out the underside of the hood scoop to make it functional. The 338-bhp four-barrel was the base engine. This was a project started with the end goal of building a 427 Hemi. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966. 1962 - 389 SD Code 544127. ft. After the SD-455 was certified with the new cam, it was production-ready but was then further delayed by the EPA mandating Pontiac recertify all of its engines when the EPA discovered that part-throttle emissions exceeded the limits. 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 compression ratio will be 10.6:1. Manage Settings said the "Pontiac 421 cu. Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. The Ram Air IV replaced the Ram Air II in 1969. - P.B. Open pressure: 282 pounds at 1.100-in This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). [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. Intake manifold: Original '64 PMD tri-power It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . After outselling Oakland, Pontiac became the sole survivor of the two by 1932. 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. Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified 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. 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. NASCAR race cars embody the muscle car philosophy of power. 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 Intake: 218 cfm at 0.500-in Free local pickup. 1966 Pontiac Catalina technical specifications and data. The 428 was increased to 456.12cuin (7,474cc) in 1970. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . 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. Method used to retain pins in pistons: . Pontiac's initial plans were to use a camshaft with specs identical to the 041 Ram Air IV camshaft, but testing showed emissions, while technically compliant, did not have "cushion" to satisfy Pontiac's emissions engineers, to avoid production variation leading to any non-compliant engines being produced and sold. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. Boost was wastegate limited to 91psi (0.6210.069bar). The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. 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. The SD-389 was limited to a single 4-barrel while the SD-421 used dual 4-barrels. 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. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. It tips the scales at 3,950lbs. It was renamed 428 HO for 1968. 744) and a new valve spring package with dampers to positively control valve action. Standard motor was the 421 4 barrel with 342 horsepower, which was no slouch itself. By comparison, the factory 421 H.O. To learn about it, read. 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). [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. The most famous S/D of them all. . 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. Secondary: Front and rear #70 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 . The GTO came with a four-barrel 389 V8 with 335 horsepower. These same heads were also used on the 1964 GTO 389 tri-power engines. The four-barrel version, set up for sustained high speeds, had 390 hp.