An innovative design feature was mounting the rocker arms on ball pivots on studs set into the cylinder head, rather than using a separate rocker shaft. The 338-bhp four-barrel was the base engine. for 1980, and the 8th being a "T" for 1981). Intake: 218 cfm at 0.500-in The 421 SD produced up . Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. Timing chain: LPC, double rollerINDUCTION A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". 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. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. The mighty Pontiac 421 was a star on the drag strip and a super nova on the Nascar tracks of the first half of the 60s. Brand: Crower PN 60311, solid 1963 - 389 SD Code 543797. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. Pontiac V8 Engine Codes and Specifications. The 2+2 reverted to option status for '67, then died, a proud relic of a time when big cars, Pontiacs in particular, ruled the streets. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. 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. Unique exterior features included "2+2" badges, twin lens taillamps, and chrome bodyside gills; Pontiac's famous eight-lug aluminum wheels were the ultimate optional touch. 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. Jim told HPP, "Since I was a young man in the '60s, I always thought how great it would be to find a true 100hp in a legendary 421 Tri-Power setup that retained its iron heads and intake. A mere five were built, all with a four-speed transmission. Lobe separation angle: 112-deg As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. 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. Known as GM's performance-oriented division, Pontiac lived up to the hype by creating the first Muscle Car and kicking off the Muscle Car era. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. Ellingson Motorcars (877) 638-7170. Learn how Classified Ads works . 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. Only about 2000 like this one were built with 4 speed Muncie transmissions. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Reductions in reciprocating weight free up horsepower. 1968 - 400 Ram Air II Round Port Code 96. 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. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. ", 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. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Shipping to: 98837. Low-performance and two-barrel applications, the standard engine in full-sized Pontiacs, got 1.96in (49.8mm) intake and 1.66in (42.2mm) exhaust valves and pressed in rocker arm studs. Original plans called for a forged crankshaft, although actual production SD455s received nodular-iron crankshafts with minor enhancements. In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. 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. Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 1966: 421: 9782611 (late) 1967-1969. Simply put, what good is the power if the engine does not last? It was renamed 428 HO for 1968. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. So large are the intake ports that the pushrods run through the center of each port via pressed-in tubes, in addition to streamlined airfoils over the tubes themselves to improve port shape, and increase flow velocity. As with all other Pontiac V8 motors that evolved from the 316 V8, the 421 was simply a bored out and stroked version of the popular Pontiac 389 V8. PONTIAC : 1965-75Tune-up Specifications : Year: Engine Car Model: Spark Plug Type (AC) - Gap: Point Gap: Dwell Angle: . 540306 featured 1.92/1.66-inch (49/42mm) valves and was carried over from the previous model year, production stopped in March 1962 and then casting No. Primary tube diameter: 1.75-in True Pontiac engines were designed and built in Detroitnot on a computer, but often by GI-bill-educated engineers who grew up working with their hands and now had a slide rule in their pocket instead of a greasy rag. Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. Offered on select models from 1957 through 1966, Pontiac's Tri-Power induction system added a new dimension of performance to the General Motors brandand a colorful new term to the hot rodder's vocabulary. 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. 1965 Pontiac LeMans GTO Mecum. Math, not gasoline, makes horsepower under the hood of a Pontiac. We and our partners use cookies to Store and/or access information on a device. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. This installment includes the assembly and parts selection up to the long-block. or Best Offer. 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. Brand: Fel-Pro head and intake/ SCE pan and timing cover From 1959 to 1966 Pontiac continues making improvements. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. The 428 was factory installed in large cars only. In 1967, the Pontiac 2+2 became an option on the . 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. Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. 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 . 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). Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. Oil pump: . Keepers: Comp Cams race locks 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. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . The single four barrel was rated at 333 bhp while the Tri-Power version carried a 348 bhp rating. 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 Engine Torque Specs Pontiac Engine Torque Specs. Where else will the extra 100 horses come from? Rear Main Cap. This was to ensure there was enough fuel to cool the cast offset dished pistons. The rod weighs 751 grams versus the stock rod at 958 grams. Laconic would be one way to describe this Pontiac's eBay listing, all it states is, "1966 Pontiac Ventura, 421 Tri-Power, 4 speed Runs/ Drives Great, Very Clean - Garage Kept".OK then, now you know what I know. The 1970 '455 HO' was a conventional "D" port engine. [4] It was replaced by the 455 for the 1970 model year. For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. The base engine was the 421 four-barrel with 338 horsepower. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". The shaker wore the decals "455 H.O." 1966 Pontiac Catalina technical specifications and data. Engine Displacement: 432 ci By 1965 and 1966 the same combinations would be rated at 338hp (252kW) for the 4bbl and the two Tri-Power versions would be rated at 356hp (265kW) and the H-O version at 376hp (280kW). - P.Top - Correct Exterior/Interior. A limited-slip differential and gearing up to 4:11.1 were optional. Rated at 370 horsepower at 5,200 rpm and 460 pounds-feet of torque at 3,800 rpm, it has 10.75:1 compression, with induction through three Rochester two-barrel carbs, Pontiac's well-known "Tri-Power" setup. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. Styling for Status. 1967 - 400 Ram Air Code 97. Pontiac RAIII/IV Engine parts collection Price $14000.00. Balancer: Original PMD rebuilt by Damper Doctor 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. 1966 Pontiac Catalina Kits for Pontiac applications. Note the tri-color Pontiac Ventura upholstery. 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). like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. The 455 HO moniker was again carried over, this time as a near-exact repeat of the 1971 offering, the only changes were the carburetors (they used a conventional 750cuft/min (21m3/min) unit this year), and the head castings (casting #7F6). The 4-barrel version was available from 1978 to 1981 and the Turbo version was limited to the 1980 and 1981 model year, however, it was originally intended to be available for the 3rd generation Firebird before its cancellation by GM. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . The 389 was the standard engine on the GTO up to 1966. Casting number: 97770716, '64 date The 301 Turbo package mandated air conditioning, the THM350 (sometimes referred to as the CBC350 in various literature) non-lockup automatic transmission (THM350C lockup in 1981 Trans Ams), and 3.08 rear axle gearing. superior_queens (3,035) 100%. in., again available only in the GTO and Firebird. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. 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. Intake manifold: Original '64 PMD tri-power 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. Since the story of this 421 is better told in pictures, follow along as we take you on this exciting journey! According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. Preparation: Install in rod, torque, measure ID Stating in 1962 the "421" and the "421 SD" engine became available as a factory option until 1966. intake duration and later 1964 L with 288deg intake essentially the same as the 068 cam. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. . The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. In addition to the more refined cylinder heads, block casting reinforcements in the lifter galley and main bearing oil pan rail area, it had forged connecting rods with larger 716-inch-diameter (11mm) bolts. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. 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. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. 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. 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. High output Pontiac V8 Cylinder Heads. Casting No. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . The engine compartment of this concours Catalina is beautifully finished. The heads were a new design featuring siamesed intake ports. The manuals had Hurst shifters. 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. Math, not gasoline, makes horsepower under the hood of a Pontiac. 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. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. 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". The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. According to GM mandates horsepower was now rated in net figures as opposed to gross, so on paper the 1972 455 HO appeared to have a significant drop in power, but in fact it was very much the same engine, and performance figures reveal this to be true. Vacuum advance: Not usedEXHAUST 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. Fuel line size: 38-inch, 516-inch to carburetor Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. 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). VEHICLE TYPE . The concept car Pontiac Strato-Streak was used to introduce the V8 and in later years the engine was installed in Pontiac products. This was the only Poncho with standard 421-cid power. In 1967, the cylinder head design was improved for the 400 4-barrel engine. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. In addition to the inline 6, Pontiac used the Oakland V8 for one year, 1932, debuting the Pontiac straight-8 engine in 1933. The cylinder heads on the 400 CID version had an intake port volume of 290cc (17.70cuin), nearly twice the size of a typical standard D-port Pontiac head - and flowed in the area of 315cuft/min (8.9m3/min) @ 0.8in (20mm) valve lift; in the realm of the NASCAR-dominating Chrysler 426 Hemi. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). Initial advance: 18-deg Cam was a #541596 McKellar No. Along with proper parts selection, accurate machining and assembly are also important Crank: Original '64 421 designs, the SD-455 was a much improved engine. The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). 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. Engine displacement is a function of bore and stroke. 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). 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. 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. 1963 Pontiac V8 Engine Specs. 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 was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. 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]. 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. 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. 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. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. . Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. 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 . All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. said the "Pontiac 421 cu. Standard in the Firebird Trans Am, it was still a rare engine. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. Pre-Owned. 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). It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. Year: CU IN: Casting # 1967: 326. Simply called "Ram Air" by Pontiac[17] it was the first in a series of engines available from Pontiac as regular production line options and officially called Ram Air. These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. The most valuable Pontiac GTO is the 1969 Judge convertible with the 370-hp Ram Air IV engine. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore HP = flow at 28 in/H2O x 0.257 x # of cylinders. 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. 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. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. It included a new camshaft with duration increased from 288/302 (No. Email Email. Preparation: Wash after balance for assembly Coil: GM 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. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . Primary tube length: approximately 31.00 inches 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. Free-flowing exhaust manifolds from the 400 Ram Air were used late in the model year. The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. This camshaft sported a 308-/320-degree duration with 0.47-inch (12mm) lift. 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. Only 630 Bonnevilles were produced for 1957, all of them fuel-injected. Exhaust: 180 cfm at 0.500-in 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. NASCAR race cars embody the muscle car philosophy of power. . This money bought a potent 389 V-8 with 267-283 bhp . Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? Under the leadership of chief engineers Pete Estes and John DeLorean, Pontiac engine guru Malcolm "Mac" McKellar (1920-2011) and crew developed the Super Duty 389 and 421 NASCAR engines that embarrassed the Fords and Chevrolets at Daytona. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . [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. Final torque ratings may vary and need to be determined based on application and parts used. 5 January 2007. To learn about it, read. Not where most enthusiasts go first. It also could hold its own against a range of performance cars. Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. The Ram Air IV replaced the Ram Air II in 1969. 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. As Pontiac still wanted to offer a performance motor to compete in the performance market, they looked back to the 400 Pontiac and how it could be improved to offer greater performance while meeting CAFE standards. Bore/Stroke ratio: 1.04:1 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . 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]. The W72 package was a standalone option, and although was discounted when ordered in conjunction with the Y82/Y84/Y88 Special Appearance package, did not come included with Special Edition Trans Ams, it remained an extra cost option. It was called the Ram Air IV due to the planned use of four air inlets. Torque: See Part 2 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. The 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. 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. RamAir 4 Motor Price $15500.00. 1969 - 400 Ram Air III Code 62. [22]. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari.

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