Duration at .050: 247/252-deg In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. The four-barrel version, set up for sustained high speeds, had 390 hp. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. 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. 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. 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). When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. Centerline: 110-deg Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. 421 CID V8 - 4BBL - Automatic - P.S. Mods: Intake port match, valve bowl blend, improved short-turn radius Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in 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. The "455 HO" moniker took on a whole new meaning with the introduction of the 1971 model year; Intended as a low compression progression from the previous years Ram Air IV engine, all 1971 455 HO engines used a heavy duty 4 bolt main block, round port cylinder heads (casting #197; with 8.4: compression), "Ram Air" style exhaust manifolds, and a two-part aluminum intake manifold. The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. Valve seals: U.S. Seal The 421 SD Tri . This is it! Melling PN M54D with 60 psi spring, made 70 psi at 6,000 rpm with 30W oil The goal of making a Pontiac Hemi succeeded but the engine was never produced. 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". Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. Other dimensional factors such as the wheel base, curb weight and length were largely unchanged. The rod weighs 751 grams versus the stock rod at 958 grams. In 1968, a 320hp (239kW) HO option was offered in the Tempest and Firebird. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". The Ram Air IV replaced the Ram Air II in 1969. 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. 1966 Pontiac 2+2 $64,995. 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 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. 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. This new material had stronger alloys in the iron. 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. [22]. Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. These are general guidelines. The base engine was the 421 four-barrel with 338 horsepower. 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. By comparison, the factory 421 H.O. Brand: Crower PN 60311, solid [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. [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. The GTO came with a four-barrel 389 V8 with 335 horsepower. Power output ranged from 135hp (101kW) to 170hp (127kW). 3.75. A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). The 455 was used through 1976 when it, as with many other large displacement engines, was discontinued as manufacturers moved to smaller, more efficient models, even in their full size car lines. Stock Pontiac Engine Specs. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. The W72 offered many improvements over the standard L78 400 Pontiac. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 1962 - 389 SD Code 544127. The Block Date Code represents the production date of the engine. Distributor: '61 Delco cast-iron with direct oiling While not related to the 400 W72, the concept was the same. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. for 1980, and the 8th being a "T" for 1981). - P.Top - Correct Exterior/Interior. The horsepower ratings of this era were often dubious, with engines rated higher or lower in output for advertising, political, or insurance purposes. Seat pressure: 110 pounds at 1.600-in gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . 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]. 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. Headers: Hooker Super Comp (for dyno test) 1966 Pontiac Catalina The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Lifters: Crower solid with EDM oil hole (0.024 inch) 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. The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. 1967 - 400 Ram Air Code 97. The stroke increased to 4.21-inch (106.9mm). See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. Both Randy and Stan were aware of the . Valvesprings: Crower, dual no damper 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. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). Reductions in reciprocating weight free up horsepower. 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. 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. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. RamAir 4 Motor Price $15500.00. A panel covers the dash opening where the radio would have been on a standard Catalina. Paul Stenquist. 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. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. This same camshaft was also used in Pontiac's 19691970 RA IV production cars. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. (V8) - Stamped on right front side of block or beneath production . Tri Power engine however was optional. 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. 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. For a few more ponies through better oil control, a factory full-length windage tray will be added, since Pontiac didn't use one on this engine originally. 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. . Though airflow is paramount in making power, there are other aspects of the engine that are just as important. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. 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. Learn how Classified Ads works . The 301 Turbo was unique since it had a beefier block than the 197779 versions (which carried on in the non-turbo versions in 1980 and 1981), a very mild camshaft with 0.35in (8.9mm) lift and 250 degrees gross duration, a 60psi (4.1bar) oil pump to ensure adequate oil to the oil-cooled Garrett TBO-305 Turbocharger, a rolled fillet crankshaft, a fully baffled oil pan, and a specific 800cuft/min (23m3/min) Quadrajet carburetor. 1965 Pontiac LeMans GTO Mecum. 1966 Pontiac Catalina Specifications and Production. in. Along with proper parts selection, accurate machining and assembly are also important. The code consists of 3 or 4 digits. Mods: Flow-test indicated '66 center carburetor would be required to improve total cfm, adapter made to fit '66 center carburetorIGNITION Pontiac offered this to the public as a streetable version of the 421 SD. Wires: NAPA Belden 7 mm SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. The heads were a new design featuring siamesed intake ports. 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. Manage Settings Free shipping on many items | Browse your favorite brands | affordable prices. Preparation: File-fit for end gap if needed, wash A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. ][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. This 1966 Pontiac 2+2 Convertible is a beautifully restored big-block convertible that is ready for some boulevard cruising! Example: A128 = January 12, 19*8. 1966: 421: 9782611 (late) 1967-1969. 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. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. For 1967, Pontiac retired the 389cuin (6.4L) and replaced it with the 400cuin (6,554cc), a 389 bored-out by +0.06in (1.5mm) to a bore and stroke of 4.12in 3+34in (104.6mm 95.3mm). The L75 455 engine continued as an option into the 1976 model year for the Trans Am, however, Pontiac opted to drop the "H.O." Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. 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. 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. On this Wikipedia the language links are at the top of the page across from the article title. Even more powerful were the 421 Super Duty V8s that could produce up to 410 horsepower. Ellingson Motorcars (877) 638-7170. 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. By 1963 Pontiac decided it was time to release the 421 V8 officially to the general public and the motor would continue to be available until the end of the 1966 model year. . The external dimensions of all their V8s, from 326455cuin (5.37.5L) were the same. 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. The 421 also marked the end of the option for a forged-steel crankshaft. "1966 Pontiac 2+2" PONTIAC : 1965-75Tune-up Specifications : Year: Engine Car Model: Spark Plug Type (AC) - Gap: Point Gap: Dwell Angle: . Offered from 1967 to 1969, it produced 360 and 376hp (268 and 280kW) in 1967, 375 and 390hp (280 and 291kW) in 1968 and 360,370 and 390hp (268,276 and 291kW) in 1969. 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. Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. Whether all were installed in GTOs is unknown. This had extra-rich "DX" secondary metering rods and a remote vacuum source for the primary metering rod enrichment circuit to allow the Power Enrichment Vacuum Regulator (PEVR) to release the primary metering rods to move to the up position (enrichment) anytime during boosted conditions. "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. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. Horsepower: See Part 2 Not where most enthusiasts go first. This test would tend to lend credence to the CAR AND DRIVER and HOT ROD tests of 1973 Super Duty cars with 3.42 gears, no air, and 160lb (73kg) less weight as being representative of production specimens capable of mid to high 13-second passes at 104mph (167km/h). Unusual for a major automaker, Pontiac did not have the customary "small-block" and "big-block" engine families common to other GM divisions, Ford, and Chrysler. Muscle Cars. Engine Oil: 95 ft-lbs. Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. 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 and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Some 400s were dealer installed. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: .
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