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superior_queens (3,035) 100%. Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs Are you thinking of buying a 2007 muscle car, or any other car? 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 engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. . The consent submitted will only be used for data processing originating from this website. The heads were a new design featuring siamesed intake ports. Secondary: Front and rear #70 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. There was also the addition of dual exhaust, and for vehicles equipped with a manual transmission, a slightly more aggressive camshaft. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. Crank: Original '64 421 The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. 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 . And it cruised silently and rode with less harshness than muscle intermediates. Exhaust: 180 cfm at 0.500-in 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. Engine Block Date Code. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . 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. Note the tri-color Pontiac Ventura upholstery. like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. 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. 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 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. 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. 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]. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). 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. Along with proper parts selection, accurate machining and assembly are also important. 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). 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. 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. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. Hewing to GM's standing edict limiting engine size to 400 cu in for its midsize and smaller cars, the 360hp (268kW) (underrated),[citation needed] the 400 cubic inch Ram Air V-8 was the most powerful and advanced option available in the 1967 GTO and Firebird. 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. Casting number: 97770716, '64 date Whether all were installed in GTOs is unknown. In 1967, the cylinder head design was improved for the 400 4-barrel engine. From 1959 to 1966 Pontiac continues making improvements. HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. Pontiac ignited the classic muscle car era with a stroke of marketing genius. . Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. Returns; . 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. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. 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. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. This installment includes the assembly and parts selection up to the long-block. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. Here are features on more than 100, Muscle cars created their own culture. 093: 66 389 GTO: 65 . It featured the "744" 301/313 camshaft, which offered more duration and overlap than the "HO". A limited-slip differential and gearing up to 4:11.1 were optional. 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. 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. Where else will the extra 100 horses come from? 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. The 421 badging was standard on the 2+2, the 421 H.O. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. 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. 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. 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). A total of 1,808 Ram Air IV production cars were built over its 2-year production. The first of the "big journal" Pontiac V8s, it had a bore and stroke of 4+332in 4in (104.0mm 101.6mm) and came with dual four-barrel carburetors. Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM 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. Free-flowing exhaust manifolds from the 400 Ram Air were used late in the model year. Free shipping on many items | Browse your favorite brands | affordable prices. Still, it was the strongest American engine offered that year. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). 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. This money bought a potent 389 V-8 with 267-283 bhp . Preparation: File-fit for end gap if needed, wash This camshaft sported a 308-/320-degree duration with 0.47-inch (12mm) lift. 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. Pontiac first offered three two-barrel carburetors in 1957 and the Tri-power set up was an option on the GTO from 1964-66. for 1980, and the 8th being a "T" for 1981). Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. 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. - P.B. 1962 - 389 SD Code 544127. 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. Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. It also sports the four-speed manual, limited . For 1967 only Pontiac called this engine the Quadra-Power 428. The fuel-injected engine became an option on any Pontiac model, carrying a staggering price tag of $500 (almost 15% of the car's base price). 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]. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Pre-Owned. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". All Rights Reserved. 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. This is the original car featured in the May 1962 issue of Motor Trend Magazine that was modified by Royal Pontiac and driven by Jim Wangers. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. 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). Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. 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. Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. 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. He thinks the stock exhaust flow of 180 cfm will suffice for this build. Power output ranged from 135hp (101kW) to 170hp (127kW). The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. 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. The engines feature a cast-iron block and head and two valves per cylinder. 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. 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. 287. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. The 670 heads were used until May 1967 when they were upgraded to become the "97" heads, which were then replaced late in the model year by the "997" heads which incorporated the upgrades of the "97" heads. Unfortunately, that's what happened with the 1963 Pontiac Super Duty 421. 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". The single four barrel was rated at 333 bhp while the Tri-Power version carried a 348 bhp rating. Plans were made to produce Firebirds and GTOs with advertised ratings of 355hp (265kW) and 375hp (280kW) respectively but concerns about emissions, the response of the automobile safety lobby, and the warranty implications of a high-revving street engine led to cancellation of the program.[why? Mechanical advance: 36-deg at 3,200 rpm Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. 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. Distributor: '61 Delco cast-iron with direct oiling Prices ranged from $2,760 to $3,220 . Most Pontiac engines were painted light blue. 1967 - 400 Ram Air Code 97. Pontiac offered this to the public as a streetable version of the 421 SD. The other major difference between the "typical" Pontiac engine of the time was that this one used the large . They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. It was rated at 475hp (354kW). The 421SD was available in 1961 as a dealer option or over the counter then in 62 and 63 from the factory, and was fitted with a list of internal modifications designed solely to withstand the abuse of drag racing. Lobe separation angle: 112-deg By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. Torque: See Part 2 Royal Pontiac developed the prototype of the package on their 1965 GTO drag car and Pontiac picked up the idea and in August 1965 Pontiac offered the new Fresh Air package to dealers consisting of the parts and instructions needed to make the hood scoop functional, including the metal tub to mount to the carburetors and rubber gasket to seal it to the underside of the hood. The SD-455 used round-port cylinder heads similar to those used on the 1971 and 1972 455 HO, with specific "LS-2" intake and cast-iron exhaust header manifolds. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 Additionally, the 301 W72 never received the option to come equipped with a manual transmission like the standard 301 received in 1979, and disappointingly, production for all Pontiac V8's ended soon after as GM sought to "corporatize" engine production. Email Email. Carb: (3) Rochester two-barrels PMD 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. 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. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. Neither casting was equipped with an exhaust crossover. The shaker wore the decals "455 H.O." The 1979 W72/WS6 equipped Trans Am was considered to be one of the overall best performing cars of the decade due to having a powerplant that produced more power than any other competitor on the market at the time with handling equipment to supplement the performance.[12]. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Head ID Location Royal Pontiac's engine swap wasn't a new trick for Pontiac. By comparison, the factory 421 H.O. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . . . 1966 Pontiac Ventura Specifications. [11] By mid-1978, the W72 could no longer be ordered in conjunction with the MX1 3-speed Turbo-Hydramatic 350 automatic transmission, and could only be ordered with the 4-speed manual transmission. 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. 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). Final torque ratings may vary and need to be determined based on application and parts used. 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. Simply put, what good is the power if the engine does not last? The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . These same heads were also used on the 1964 GTO 389 tri-power engines. It requires a compression ratio of at least 10.25:1. "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. This was a project started with the end goal of building a 427 Hemi. 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS Tri Power engine however was optional. 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.