Pontiac Engine Torque Specs Pontiac Engine Torque Specs. Price $14000.00. Casting No. 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . To determine horsepower from airflow, invert the equation: Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. For 1974 another 1,001 (943 Trans Am, 58 Formula) were built, after which the SD-455 was discontinued. 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. 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. 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. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. These are general guidelines. 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 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. The 428 was increased to 456.12cuin (7,474cc) in 1970. 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. Available only in the 1973 and 1974 Firebird Formula and Trans Am, the SD-455 consisted of a strengthened cylinder block that included 4-bolt main bearings and additional material in various locations for improved strength. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). Though airflow is paramount in making power, there are other aspects of the engine that are just as important. All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . 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. HOT ROD and CAR AND DRIVER) were fitted with the Ram Air IV-spec camshaft and functional hood scoops - a fact that has been confirmed by several Pontiac sources. Pontiac produced the 421 V8 engine from 1961 to 1968. The horsepower ratings of this era were often dubious, with engines rated higher or lower in output for advertising, political, or insurance purposes. The 338-bhp four-barrel was the base engine. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. The 389 was the standard engine on the GTO up to 1966. The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. The 1970 '455 HO' was a conventional "D" port engine. 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. 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. 1966 Pontiac Catalina [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. Year. superior_queens (3,035) 100%. The 428 was factory installed in large cars only. Block/Crank combo: '64 four-bolt 421 / '64 OE 4.00-in stroke Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). 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. Original plans called for a forged crankshaft, although actual production SD455s received nodular-iron crankshafts with minor enhancements. The 455 HO designation made its debut in 1970; Rated at 360 or 370hp (268 or 276kW) (depending on which vehicle it was installed into) & 500lbft (678Nm) of torque, it differed from the regular full sized car 455 by large valve heads with smaller combustion chambers, and a larger camshaft. Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. Standard motor was the 421 4 barrel with 342 horsepower, which was no slouch itself. Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM 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. Once corrected the SD-455 was recertified and was released for production in late April 1973. It included a new camshaft with duration increased from 288/302 (No. 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). Oil pump: . Read. The 1972 455 HO was rated at 300hp (224kW) @ 4,000rpm and 415lbft (563Nm) @ 3,200rpm. street engine. 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. VEHICLE TYPE . It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. 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 . He thinks the stock exhaust flow of 180 cfm will suffice for this build. There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . An example of data being processed may be a unique identifier stored in a cookie. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. - P.B. From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. 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. 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). 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. The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. 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. A mechanical system built by Rochester, it was similar in principle, but not identical, to the contemporary Chevrolet "fuelie". A higher-output version was offered, called the 326 HO (High Output). In the 1968 Pontiac GTO it was given a 10.75:1 compression ratio and tuned to deliver 360 horsepower and 445 foot-pounds of torque.[2]. Only 630 Bonnevilles were produced for 1957, all of them fuel-injected. Forged steel 6.625in (168.3mm) rods (Ram Air V style), Large-valve heads (valve diameter): 2.4in (61mm) intake, 2in (51mm) exhaust, Small-valve high-RPM head (valve diameter) 2.19in (56mm) intake, 2in (51mm) exhaust. The V8 engine was introduced for the 1955 model year as the "Strato Streak". 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. Two tri-power 421s were optional, one with 356 bhp, the other with 376. The compression ratio will be 10.6:1. 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. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. The first letter equals the month. With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Primary tube length: approximately 31.00 inches Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. 1963 - 389 SD Code 543797. The last was the 421 HO and included a high-output camshaft and valve train. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. The Ram Air IV replaced the Ram Air II in 1969. The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. 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. 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. The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). 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. The 421 also marked the end of the option for a forged-steel crankshaft. Pontiac differed from other GM Divisions and most other manufacturers in producing only a single small block V8, rather than adding a larger big block to its line-up. The main innovation of the Pontiac engine was reverse-flow cooling and the stamped rocker-arm system, which had been devised by Pontiac engineer Clayton Leach in 1948. The Block Date Code represents the production date of the engine. However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. [19], Parts for Ram Air V engines are not readily available. 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 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]. 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). 1962 - 389 SD Code 544127. The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. 744) and a new valve spring package with dampers to positively control valve action. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 18 watchers 1966 Pontiac Catalina . Though never factory-installed in any car, the ultimate engine of the Ram Air line of engines was the tunnel-port Ram Air V. In 1969 Pontiac created four versions of the Ram Air V engine: a 303cuin (5.0L) short deck version for SCCA Trans-Am racing, a 366cuin (6.0L) variant for NASCAR, a 400cuin (6.6L) version for street use in GTOs and Firebirds, as well as a 428cuin (7.0L) adaptation for drag racing. Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. or choose Generic to see kits that might fit a . 1966: 421: 9782611 (late) 1967-1969. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. 093: 66 389 GTO: 65 . . The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. A limited-slip differential and gearing up to 4:11.1 were optional. The overhead-cam six-cylinder engine was new for 1966 and the standard engine in the Tempest and Tempest Custom. 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. Only about 2000 like this one were built with 4 speed Muncie transmissions. The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. This was based on results of over 1 million test miles, which was unheard of at the time. Pontiac ignited the classic muscle car era with a stroke of marketing genius. 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 company says engines running this cam benefit from headers, cylinder-head port work, a large-cfm carb, and an ignition upgrade. A big chunk of the appeal of the 1965 and '66 2+2 was the fact that you got a standard 421 under the hood: The 338hp, four-barrel 421-cu.in. This new material had stronger alloys in the iron. 1967 - 400 Ram Air or 428 Code 670. 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). The next 1 or 2 numbers represent the date, and the last number is the year. The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . The very modest cam, combined with a low-compression ratio of 8.4 (advertised) and 7.9:1 actual resulted in 290hp (216kW) SAE NET. 1968 Pontiac GTO 428 / Royal Bobcat. The four-barrel version, set up for sustained high speeds, had 390 hp. 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. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". In 1968, a 320hp (239kW) HO option was offered in the Tempest and Firebird. It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. An HO version could be ordered in the GTO, as GM had lifted its restrictions on offering engines larger than 400cuin (6.6L) in mid-sized cars (resulting in the 454 (7.44) Chevrolet Chevelle, The 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. The rod weighs 751 grams versus the stock rod at 958 grams. It was rated 180hp (134kW) @ 4600rpm and 264lbft (358Nm) @ 2400rpm with a two-barrel carburetor, 200hp (149kW) @ 4600rpm and 278lbft (377Nm) @ 2800rpm with the four-barrel carburetor. 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. I don't know if it can be done, but I'm going to try." 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 . There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. The 1968 Ram Air II remained at 400 cu. 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. 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. 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. Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. Along with proper parts selection, accurate machining and assembly are also important. And it cruised silently and rode with less harshness than muscle intermediates. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 A concave rear window, fender skirts, and ribbed die-cast lower body trim, augmented the Grand Prix's upscale appearance. 1966 Pontiac Catalina Specifications and Production. He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. 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. Located at the back of the engine near the Distributor. Officially named the Quadra-Power 400 for 1967 and renamed 400 HO for 1968, the 400 HO was first offered for 1967 as the third engine in the GTO line after the automatic-only 400 2-barrel and the standard 400 4-barrel (the 400 HO would not be offered in the Firebird until the 1968 model year). This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. 63 421 SD: 64: D-Port: 2.02/1.76: 77: 65 GTO, 65 421 HO: 65: D-Port: INTAKE MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65-79 HEADS. The base engine was the 421 four-barrel with 338 horsepower.
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