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. Open pressure: 282 pounds at 1.100-in The shaker wore the decals "455 H.O." Read. The 421 SD Tri . 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. Royal Pontiac's engine swap wasn't a new trick for Pontiac. By comparison, the factory 421 H.O. A new engine was fast-tracked, its relatively late start allowing it to take advantage of developments proven in the Oldsmobile V8 and Cadillac V8. Keepers: Comp Cams race locks SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. Example: A128 = January 12, 19*8. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Only about 2000 like this one were built with 4 speed Muncie transmissions. These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number. 1966 Pontiac Catalina The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. Rod/Stroke ratio: 1.65:1BOTTOM END It retained the 421's 4in (101.6mm) stroke and 3+14in (82.6mm) main journal. This was to ensure there was enough fuel to cool the cast offset dished pistons. The 338-bhp four-barrel was the base engine. The W72 Performance Package also included an upgrade to the rear differential ratio, setting the rear gear ratio to 3.23 for all 1977 and 1979 W72 Firebirds, with the exception being 3.42 for 4-speed equipped W72 Firebirds in 1978 only. Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. 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. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). VEHICLE TYPE . . ][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. For the truly obsessed, 16 Grand Prixs were built with Pontiac's 421 Super Duty engines, rated at a staggering 370 bhp. It tips the scales at 3,950lbs. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. And it cruised silently and rode with less harshness than muscle intermediates. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. Optional power was the 421/356 with Tri-Power or the 421 HO putting out 376 horses with Tri-Power. With a view to the latter, what we find lurking under the hood is the 421ci Tri-Power V8. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. The other major difference between the "typical" Pontiac engine of the time was that this one used the large . Lift: 0.515/0.525 with 1.6:1 rockers Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. 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. Greater throughput mixed with the proper amount of fuel and ignited at the ideal time for the flame to expand against the piston will result in more power. Its cast "670" heads had taller valve spring heights than the standard D-port heads, and the only 14-degree valve angle closed combustion chamber making these heads unique. Often called the "Ram Air III", this engine was officially called the "400 Ram Air" for 1969 and then simply "Ram Air" for the 1970 model year. 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. 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]. The Ram Air IV used the Ram Air II's camshaft but lift in the Ram Air IV was increased to 0.52in (13mm) thanks to the use of 1.65 ratio rocker arms (vs 1.50). Though airflow is paramount in making power, there are other aspects of the engine that are just as important. Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish Wires: NAPA Belden 7 mm Pontiac's SCCA Trans-Am program was promising, with race-ready engines producing 475hp (354kW) to 525hp (391kW), however the series General Competition Rules required the manufacturer to produce no less than 250 vehicles with the 303. What was most interesting about the 421 engine in the beginning was that it was a dealer installed option only known as the SD (Super Duty) 421. The goal of making a Pontiac Hemi succeeded but the engine was never produced. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Catalina Vista 421HO Trophy V-8 Tri-Power 4-speed in 1964 the model with 4-door hardtop sedan body and V-8 6902 cm3 / 421.2 cui, 276 kW / 375 PS / 370 hp (max) offered since October 1963 for North America U.S. special version. Deck Height: 10.215-in Preparation: File-fit for end gap if needed, wash 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. Engine Displacement: 432 ci 1967 - 400 Ram Air or 428 Code 670. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? Both of these engines were originally dealer-installed options, but since the NHRA moved to limit racing eligibility to factory-available options on cars available to the public, Pontiac made the SD 421 a factory option for 1962, and most of the approximately 164 SD 421 engines were installed in the Catalina, with another 16 being installed in . From 1959 to 1966 Pontiac continues making improvements. Ram Air induction was optionally available with the 455 HO in the Firebird Formula(standard on Trans Am), GTO (standard with "The Judge" package), and 2-door LeMans Sport when the T41 Endura Styling Option was also ordered. All Rights Reserved. Centerline: 110-deg In 1967, the cylinder head design was improved for the 400 4-barrel engine. Pontiac did not release official power ratings for this engine, saying only that it had more than 300hp (224kW). It was renamed 428 HO for 1968. 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. The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. This chart covers Pontiac V8 Engines; 265, 301, 326, 350, 389, 400, 421 . One of the key upgrades were the 6x4 heads. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. 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]. street engine. 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. 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. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). or choose Generic to see kits that might fit a . 1967 - 400 Ram Air Code 97. Distributor: '61 Delco cast-iron with direct oiling This money bought a potent 389 V-8 with 267-283 bhp . Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. 1966 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA : 389: 8.6:1: 256: Manual: 91: 254: 2 bbl: WB . 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. Tri-power engine rated at 376 hp. Also added was the #48 casting number heads with a 68cc (4.15cuin) chamber for higher compression, along with larger 2.11 and 1.77in (54 and 45mm) valves. Valves: Competition Products stainless steel, 1.92 /1.66-in 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 . A total of 1,808 Ram Air IV production cars were built over its 2-year production. The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. Oil pump: . Crank: Original '64 421 The 2+2 option package arrived for 1965, giving the Catalina a performance persona and credentials to match. Update your shipping location. 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. A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. Balancer: Original PMD rebuilt by Damper Doctor intake duration and later 1964 L with 288deg intake essentially the same as the 068 cam. Ram Air induction was optionally available with the 455 HO in the Firebird Formula (standard on Trans Am), and the 2-door LeMans (including GTO). The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 1963 Pontiac V8 Engine Specs. Information and specs for the Pontiac 421 V8 engine. First offered as an option in 1963, the 421 HO came in a 4-barrel engine of 320hp (239kW) and one Tri-Power H-O version with a hotter cam and efficient iron exhaust manifolds and rated at 370hp (276kW). 1. On the invoicing for the 1979 model year Firebirds, they had the option listed as L78, however, every 1979 400 equipped car received a W72 engine. 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. This camshaft sported a 308-/320-degree duration with 0.47-inch (12mm) lift. 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. As a result, it was remarkably free of teething problems. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. 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. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. Though production cars only got the two hood air inlets the name was retained. 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. 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. Spiral clip This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. 1966 Pontiac Catalina . 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. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. The initial press cars that were given to the various enthusiast magazines (e.g. Pontiac . Preparation: Wash after balance for assembly [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. Two-barrel carburetor, 8.5:1 compression, 227hp (169kW) @ 4600rpm, 333lbft (451Nm) @ 2300rpm, Four-barrel carburetor, 10:1 compression, 244hp (182kW) @ 4800rpm, 350lbft (475Nm) @ 2600rpm, Two-barrel carburetor, 10.0:1 compression, 244hp (182kW) @ 4800rpm, 350lbft (475Nm) @ 2600rpm, Four-barrel carburetor, 10.25:1 compression, 270hp (201kW) @ 4800rpm, 359lbft (487Nm) @ 2900rpm. 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. The Ram Air II also incorporated the first computer-designed camshaft. A limited-slip differential and gearing up to 4:11.1 were optional. View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS The 1971 455 HO was rated at 335hp (250kW) @ 4,800rpm and 480lbft (651Nm) of torque @ 3,200rpm (gross). This was a project started with the end goal of building a 427 Hemi. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". It was offered in the following forms: For 1957 the V8's stroke was increased to 3.5625in (90.49mm), for a displacement of 347cuin (5.7L). Regarding Crower's upgrade suggestions for its . . It featured the "744" 301/313 camshaft, which offered more duration and overlap than the "HO". Here are my top six rationales for admiring the 1966 GP. 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. During 19511952, Pontiac had 23 287cuin (4.7L) V8-equipped 1953 model production prototypes running tests on the GM proving grounds. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. 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. The horsepower ratings of this era were often dubious, with engines rated higher or lower in output for advertising, political, or insurance purposes. Price $30000.00. 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. Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. Whether all were installed in GTOs is unknown. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. Are you thinking of buying a 2007 muscle car, or any other car? 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. which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. Size cfm: Total flow, 1,050 cfm Since the story of this 421 is better told in pictures, follow along as we take you on this exciting journey! Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). Sponsored Stories . Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. . From 1977 to 1981 there were 4 distinct 301 versions: For 1981 model year vehicles, the engine codes are the 8th digit of the VIN. Pontiac engineers tested their 269cuin (4.4L) V8 in 1949 or 1950 against an OHV Oldsmobile Rocket V8 303cuin (5.0L) downsized to 270cuin (4.4L). It also could hold its own against a range of performance cars. The Ram Air IV replaced the Ram Air II in 1969. Pontiac Engine Torque Specifications. Engine Oil: 120 ft-lbs. Tri Power engine however was optional. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. 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 continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). Block casting # 9773157. It shared the 4.121in (104.7mm) bore of the 400, but with a 2.84in (72.1mm) stroke for a displacement of 303cuin (5.0L). Maximum flow at 28 inches of water Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. "1966 Pontiac 2+2" The earlier 1975-78 blocks had metal shaved from the journals and bottom end as well as a decrease in the nickel content of the block in an attempt to decrease the overall weight of the vehicle to help alleviate emissions and cost. The 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. A three-speed stick was standard; a four-speed and automatic cost extra. 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. Like the 326, it was offered in both 2-barrel and 4-barrel versions. [8] All of these improvements provided the W72 with a power rating of 200hp (203PS; 149kW) at 3600 rpm and 325lbft (441Nm) of torque at 2400 rpm, while the standard L78 400 only produced 180hp (182PS; 134kW) at 3600 rpm and 325lbft (441Nm) of torque at 1600 rpm. This was the only Poncho with standard 421-cid power. Original plans called for a forged crankshaft, although actual production SD455s received nodular-iron crankshafts with minor enhancements. The GTO came with a four-barrel 389 V8 with 335 horsepower. It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. 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. At the end of 1976, Pontiac was no longer able to continue production of the 455 (7.5 L) V8 motor due to the tightening emissions requirements. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. 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. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". 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. in. The rod weighs 751 grams versus the stock rod at 958 grams. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. Free shipping on many items | Browse your favorite brands | affordable prices. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. Along with proper parts selection, accurate machining and assembly are also important After outselling Oakland, Pontiac became the sole survivor of the two by 1932. Casting number: 97770716, '64 date A set of Hooker Super Comp headers will be used on the dyno, and Jim is porting the stock heads to increase intake-port flow by 30 cfm. 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). Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore The 421 SD became factory installed in 1962 and in 1963 a street version became available from the factory with a dual four-barrel or three two-barrel Tri-Power carburetion. 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). Located at the back of the engine near the Distributor. Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. It included a new camshaft with duration increased from 288/302 (No. Diameter: 516-in From 1969 though 1970, the Ram Air IV was available in both A-Body (GTO, including Judge) and F-body (Firebird, including Trans Am) form. Year: CU IN: Casting # 1967: 326. This was underrated at 330hp (246kW). The 400 2-barrel kept the 17 degree valve angles for '67; starting in '68 all Pontiac V8s went to the 14 degree valve angle. In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm).
Holy Week Devotional For Youth, Salk Institute Vaccine Spike Protein, Riccardo Masetti Moglie, Articles OTHER