Effectively, Pontiac's V8s were all small blocks, sharing the same connecting rod length 6.625 in (168.3mm) (except for the later short deck 301 and 265 produced in the late 1970s and early 1980s before Pontiac adopted universal GM engines). The valve angle was reduced from 17 degrees to 14 degrees for better breathing. Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. . or Best Offer. Rear Main Cap. Along with proper parts selection, accurate machining and assembly are also important. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. 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 428 was increased to 456.12cuin (7,474cc) in 1970. Pontiac ignited the classic muscle car era with a stroke of marketing genius. 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). Note the tri-color Pontiac Ventura upholstery. 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. This was a project started with the end goal of building a 427 Hemi. For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. 1966 Pontiac Catalina . Casting No. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". The engines feature a cast-iron block and head and two valves per cylinder. The crankshafts were also unique in the fact that they featured only two counter weights instead of the usual five and also featured lightened connecting rod journals. Valve seals: U.S. Seal The horsepower ratings of this era were often dubious, with engines rated higher or lower in output for advertising, political, or insurance purposes. 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). 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. 1966 Pontiac Catalina technical specifications and data. 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. And it cruised silently and rode with less harshness than muscle intermediates. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. Optional was the obligatory four-speed manual or new-for-1965 Turbo-Hyramatic three-speed automatic. This simply meant that Pontiac installed both the SD-389 and SD-421 into vehicles on its assembly line. ENGINE. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. 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). Standard motor was the 421 4 barrel with 342 horsepower, which was no slouch itself. For '65, the 421-cid V-8 became a standard part of the option package, and for '66, Pontiac made the 2+2 a separate model, still based on the Catalina two-door hardtop or convertible.Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. It shared the 389's 3+34in (95.3mm) stroke, but its bore was 3.78in (96.0mm) for a displacement of 336.66cuin (5.5L). 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). [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. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. 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). In the early '60s, the engine program at the Pontiac division of General Motors was a wide-open operation that bustled with innovation. 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. 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 new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. The stroke increased to 4.21-inch (106.9mm). 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. They came up with a 269-cubic-inch (4.4L) L-head design. 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 code consists of 3 or 4 digits. However, it can easily be determined by examining the cost price of the option, where the package excluding the W72 engine cost $251, and with the engine, cost extra at $324.[10]. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). 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 W72 also featured a camshaft with a higher duration, finer tuned 800cfm Rochester Quadrajet, insulated fuel line, larger 60PSI oil pump, chrome valve covers, a larger harmonic balancer, and the "T/A 6.6" Shaker decal. Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. This was to ensure there was enough fuel to cool the cast offset dished pistons. The W72 offered many improvements over the standard L78 400 Pontiac. 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. These same heads were also used on the 1964 GTO 389 tri-power engines. There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor 1962 - 389 SD Code 544127. As Pontiac's 1967 performance brochure said, "You can add the Ram Air induction hood scoop and new high output cam and valve springs to the Quadra-Power 400 for better top end breathing." This new material had stronger alloys in the iron. Seat pressure: 110 pounds at 1.600-in Length: 8.750-inCAM Cam choice is always extremely important, and Jim decided to go with an aggressive Crower mechanical flat-tappet stick with 247/252-degrees duration at 0.050 and 0.515/0.525 lift (0.495/0.505 with 0.020 lash) with 1.6:1 rockers. By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . Price $30000.00. Wires: NAPA Belden 7 mm Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified engines. The 421 SD Tri-Power engine offered during these years produced the highest horsepower of any motor in the Pontiac V8 lineup at 376 bhp. Primary tube length: approximately 31.00 inches The Ram Air IV heads had 1/8" taller intake ports, larger intake port volume with more airflow, yet shared the Ram Air II round exhaust ports. This installment includes the assembly and parts selection up to the long-block. None of Pontiac's Ram Air engines actually enjoyed any true ram air effect. 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 . [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. To determine horsepower from airflow, invert the equation: 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. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. Prices ranged from $2,760 to $3,220 . The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. Federal emissions standards and the drive towards "corporate" engines shared among all GM divisions led to the progressive demise of the Pontiac V8 through the late 1970s. All 1980 Trans Ams received this engine as standard with the option to delete this engine choice as a credit option for the standard L37 301. The heads were a new design featuring siamesed intake ports. Tri Power engine however was optional. Specifications listing with the performance factory . In 1968, a 320hp (239kW) HO option was offered in the Tempest and Firebird. Some 400s were dealer installed. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. 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. 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm 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. Fuel pump: Will use 110-gph Carter All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). The 421 also marked the end of the option for a forged-steel crankshaft. The GTO's new hood scoop design, with the inlets centrally located and mounted above the carburetor, provided the opportunity for experimentation. With the 1964-1967 Pontiac Catalina 2+2, Pontiac achieved a combination of power, road-holding, and fine styling superior to any other big Pontiac, and most of the competition's models besides. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . (imp.) 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. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. 1. [7] Though listed as slightly less powerful than some high-performance iterations of the 400 (such as the 366hp (273kW) Ram-Air), the 455 had 500lbft (678Nm) of torque, 55 more lbft (75Nm). Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. Learn how Classified Ads works . 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). Starting at the bottom, Jim will employ lighter and stronger parts in the reciprocating assembly, as evidenced by the choice of Howards billet rods and forged Icon pistons. In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. 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. I don't know if it can be done, but I'm going to try." These muscle car profiles include photos and specifications for each model: For related car information, go to these articles: Please copy/paste the following text to properly cite this HowStuffWorks.com article: the Auto Editors of Consumer Guide Brand: Fel-Pro head and intake/ SCE pan and timing cover The W72 301 was a tuned L37 301 Pontiac V8 with some minor upgrades. It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. Power output ranged from 135hp (101kW) to 170hp (127kW). Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 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 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. For those who may not be familiar with the equation, here it is again: 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. 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. 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. 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. [22]. It was factory rated at 366hp at 5,400 RPM and 445lbs.ft. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp.
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