. The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. Lift: 0.515/0.525 with 1.6:1 rockers All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. The engine was available in all full-size Pontiacs. Rings: LPC (Liberty Performance Components) premium moly, standard tension 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). This simply meant that Pontiac installed both the SD-389 and SD-421 into vehicles on its assembly line. 1963 - 389 SD Code 543797. However, the RA II was limited to a 1.50:1 rocker ratio, while the RA IV used a 1.65:1 ratio, which yielded significantly greater total lift and, therefore, superior flow and power. 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. The consent submitted will only be used for data processing originating from this website. Pontiac Engine Torque Specifications. In 1963 Pontiac dropped the Buick division built 215 cu. of torque at 3,600 RPM in the Firebird, with only a small throttle restrictor tab on the Firebird being different. (imp.) Pontiac V8 Engine Tune-Up and Torque Specifications. Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. 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). Headers: Hooker Super Comp (for dyno test) With a view to the latter, what we find lurking under the hood is the 421ci Tri-Power V8. Thus in March 1973 Pontiac eliminated a timing solenoid that gave full vacuum advance and disabled the EGR valve in high gear after a period of time that happened to exceed the running time of the EPA testing cycle. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). 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). Oil pump: . These are general guidelines. 1966 Pontiac Ventura Specifications. The 421 badging was standard on the 2+2, the 421 H.O. A total of 1,808 Ram Air IV production cars were built over its 2-year production. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. The 421 SD produced up . Super Duty 421s were back, tougher than ever. The premier SD 421 cylinder head was the late 1962-early 1963 casting #9771980 aka "980", featuring a larger 11.3cuin (185cc) intake port volume, flowing 230cuft/min (6.5m3/min) @ 28in (710mm). 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. Fuel line size: 38-inch, 516-inch to carburetor Paul Stenquist. Boost was wastegate limited to 91psi (0.6210.069bar). . Pontiac first offered three two-barrel carburetors in 1957 and the Tri-power set up was an option on the GTO from 1964-66. Intake manifold: Original '64 PMD tri-power Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. Compression Ratio: 10.6:1 effective 1. Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. 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. Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). Open pressure: 282 pounds at 1.100-in All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins 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. Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs The 389 V8 was first introduced by Pontiac in 1959. 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. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. 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. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor Model Number: Body/Style Number: Body Type & Seating: Factory Price: . Horsepower: See Part 2 1967 - 400 Ram Air Code 97. With some WS6 "Trans Am Special Performance Package" bundles in 1978, the W72 engine was incorporated with the WS6 option group and not listed on the dealer order invoice. 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. Ellingson Motorcars (877) 638-7170. This is it! Standard motor was the 421 4 barrel with 342 horsepower, which was no slouch itself. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. Valve guides: K-Line, liners In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. 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. . Example: A128 = January 12, 19*8. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. The 421 engine is available only with related heavy-duty driveline components. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. in. The 421 also marked the end of the option for a forged-steel crankshaft. It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. pontiac engine decoder year code c/i hp tran carb car misc 1962 13b 421 3 m 2 x 4 full super duty 1962 13u 421 4 m 2 x 4 full super duty 1962 bu 421 4 m 2 x 4 full super duty . Oil pan: 8-quart with extended pick-up, fabricated retention clamp 1963 Pontiac V8 Engine Specs. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. 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. 540306 featured 1.92/1.66-inch (49/42mm) valves and was carried over from the previous model year, production stopped in March 1962 and then casting No. 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. ENGINE. One version of the engine featured camshafts driven off the front of the engine, another design had the cams driven by gears off the back of the engine. Both Randy and Stan were aware of the . This may have been propagated by the only authorized company that is licensed to reproduce these decals not including the "6.6 LITRE" in the Trans Am decal kits, and only including "T/A 6.6" with no extra cost. or choose Generic to see kits that might fit a . 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, 093: 66 389 GTO: 65 . Transistorized ignition was available. The GTO came with a four-barrel 389 V8 with 335 horsepower. . Lobe separation angle: 112-deg 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. A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. The 2-barrel version was last offered in 1979. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. That's the factory rating of the legendary 421 H.O. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. The W72 301 was a tuned L37 301 Pontiac V8 with some minor upgrades. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. Pontiac introduced the OHC 6 in two flavors for '66: a base engine with a one-barrel carburetor that developed 165 hp at 4700 rpm, and a sportier version with a 10.5:1 compression ratio, a high-lift cam, a split exhaust manifold, and GM's new four-barrel Quadrajet carburetor (below). He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. It featured a smaller bore of 3+34in (95.3mm) coupled with the same 3in (76.2mm) stroke of the 301 (same bore and stroke used by Chevrolet when the first small block motor was introduced in 1955). Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. $6.49 shipping. With higher compression and dual exhaust it produced 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 through 1967, its final year. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. 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. It retained the 421's 4in (101.6mm) stroke and 3+14in (82.6mm) main journal. Crank: Original '64 421 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. Are you thinking of buying a 2007 muscle car, or any other car? Valvesprings: Crower, dual no damper [22]. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. It was rated at 366bhp (273kW) (gross) in the GTO version. designs, the SD-455 was a much improved engine. Preparation: Install in rod, torque, measure ID However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. The 326 subsequently became the optional V8 engine for Tempests, and later the Pontiac Firebird, through 1967 and maintained the 17 degree cylinder head valve angle for its entire production run. A higher-output version was offered, called the 326 HO (High Output). To learn everything you need to know about car engines, see. of torque at 3,800 RPM in the GTO, and 340 HORSEPOWER at 5,300 RPM and 430-lb.ft. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. 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. The 1971 455 HO was available in the Firebird (optional in Formula; standard in Trans Am), the GTO (standard with "The Judge" package), and the 2-door LeMans, LeMans T-37 (including GT-37), and LeMans Sport. Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS 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 . 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. 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. It also sports the four-speed manual, limited . The Ram Air IV replaced the Ram Air II in 1969. The V8 engine was introduced for the 1955 model year as the "Strato Streak". Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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? moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". Here is another number to ponder: 370 hp. It also could hold its own against a range of performance cars. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. In light of this, the 'Year' entry, as indicated by the chart below, may actually represent the year that the heads were cast, versus the year that they were actually installed on an automobile. The Ram Air II also incorporated the first computer-designed camshaft. By comparison, the factory 421 H.O. It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. Not where most enthusiasts go first. Most Pontiac engines like total timing (rev engine past 3000 or so until the mechanical advance stops moving/advancing, vacuum advance disconnected to check total timing) somewhere between 32 and 36 degrees. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). A mere five were built, all with a four-speed transmission. 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. 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. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. 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. This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. The 421 Super Duty had been the first of these, and their large bore and stoke made them popular in NHRA and NASCAR competition throughout the '60s. [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. Mods: Flow-test indicated '66 center carburetor would be required to improve total cfm, adapter made to fit '66 center carburetorIGNITION Secondary: Front and rear #70 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."