A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). Math, not gasoline, makes horsepower under the hood of a Pontiac. By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. Rocker arms: Crower roller, 1.6:1 Price $30000.00. 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. 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. It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. This same camshaft was also used in Pontiac's 19691970 RA IV production cars. The four-barrel 400 was a popular performance option for many of Pontiac's cars. They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . 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. Cam was a #541596 McKellar No. Jim told HPP, "Since I was a young man in the '60s, I always thought how great it would be to find a true 100hp in a legendary 421 Tri-Power setup that retained its iron heads and intake. Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. The Pontiac 2+2 is a full size automobile that was manufactured by Pontiac, built on the B-body chassis.It debuted for the 1964 model year as a trim-only option for the Pontiac Catalina, with special door panels, bucket seats with a center console, and exterior badging.Pontiac marketed the 2+2 as the "big brother" to the popular Pontiac GTO.. Beginning in 1965 the name Catalina was no longer . (imp.) 1967 - 400 Ram Air or 428 Code 670. 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. 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. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . It was rated at 366bhp (273kW) (gross) in the GTO version. Also bowing in 1967 was the new Firebird, which had the . It retained the 421's 4in (101.6mm) stroke and 3+14in (82.6mm) main journal. Neither casting was equipped with an exhaust crossover. [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. 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. Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. 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. ENGINE. This camshaft sported a 308-/320-degree duration with 0.47-inch (12mm) lift. 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. Styling for Status. 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. See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". Engine displacement is a function of bore and stroke. Oil pan: 8-quart with extended pick-up, fabricated retention clamp The rod weighs 751 grams versus the stock rod at 958 grams. What is important is the total timing, the . Maximum flow at 28 inches of water He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. Bore/Stroke: 4.150/4.00-in This chart covers Pontiac V8 Engines; 265, 301, 326, 350, 389, 400, 421 . 1968 - 400 Ram Air II Round Port Code 96. Pontiac V8 Engine Tune Up Specifications. 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". To determine horsepower from airflow, invert the equation: 301 2-barrel (135hp, 101kW), (5th character of the, 301 4-barrel (150hp, 112kW), (5th character of the. The 421 was first availabe in a SD (Super Duty) model that was built for racing. Secondary: Front and rear #70 Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. . The 287 was an "oversquare" engine with a bore and stroke of 3+34in 3+14in (95.3mm 82.6mm), for a total displacement of 287.2cuin (4.7L). Standard in the Firebird Trans Am, it was still a rare engine. The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . This was a completely stock car on loan from a private owner for the test. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). 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 replaced the Ram Air II in 1969. 1967 - 400 Ram Air Code 97. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore Casting number: 97770716, '64 date Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. 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). 1966 Pontiac 2+2 $64,995. Optional was the obligatory four-speed manual or new-for-1965 Turbo-Hyramatic three-speed automatic. Exhaust: 180 cfm at 0.500-in Pontiac RAIII/IV Engine parts collection Price $14000.00. Pontiac Engine Torque Specifications. Along with proper parts selection, accurate machining and assembly are also important All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. The overhead-cam six-cylinder engine was new for 1966 and the standard engine in the Tempest and Tempest Custom. $6.49 shipping. Rocker studs: ARP special 34-in bottom A panel covers the dash opening where the radio would have been on a standard Catalina. The engine build will be discussed in two parts. 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. But the "Ram Air" 400 also mandated steep 4.33:1 gears(or 3.90:1 in Firebird), making the Quadra-Power 400 (400 HO) the top practical street engine option for most drivers. 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). It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. 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. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . This is it! Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. of torque at 3,800 RPM in the GTO, and 340 HORSEPOWER at 5,300 RPM and 430-lb.ft. 1966 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA : 389: 8.6:1: 256: Manual: 91: 254: 2 bbl: WB . Preparation: Wash after balance for assembly Most Pontiac engines were painted light blue. Pre-Owned. / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . 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. Along with proper parts selection, accurate machining and assembly are also important. The 389 was the standard engine on the GTO up to 1966. 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. Headers: Hooker Super Comp (for dyno test) Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. 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. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The main upgrade for the engine was the ESC, (Electronic Spark Control)[15] which provided slightly more power at 170hp (127kW) with 4.9L (299cuin) for the 19801981 model years. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). 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. Royal Pontiac developed the prototype of the package on their 1965 GTO drag car and Pontiac picked up the idea and in August 1965 Pontiac offered the new Fresh Air package to dealers consisting of the parts and instructions needed to make the hood scoop functional, including the metal tub to mount to the carburetors and rubber gasket to seal it to the underside of the hood. Ram Air induction was optional in the GTO, though power ratings were unchanged. 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. . 10 with 308/320 degrees of duration and 0.445/0.447-inch lift (11.3/11.4mm) with 1.65:1-ratio rocker arms and solid lifters, special #529238 forged-steel connecting rods, forged aluminum 4.09-inch (104mm) bore Mickey Thompson pistons, #542990 forged-steel crankshaft with a 4-inch (101.6mm) stroke and 3+14-inch (82.6mm) diameter main journals. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. The air cleaners look like those used on the top dog 376 gross HP 421 CI engine but there was also a lesser 356 HP version available too. The head design was incorporated from the earlier 1970's 350 Pontiac heads, and could satisfy emissions in all states except for high-altitude emissions states and California. The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. V-8 (coded WG for stick or YH for auto) was the 2+2's base engine. Stock Pontiac Engine Specs. The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. 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. 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. Valvesprings: Crower, dual no damper View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. Perhaps the most unusual variation of the Pontiac V8 was the 1961-63 Trophy 4, which was a 45-degree inclined 194.43cuin (3.2L) inline-4 created from the right bank of the 389 for the debut of the Tempest. For 1965, however, the 2+2 became a bonafide muscle car. CO2, . 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. Prices ranged from $2,760 to $3,220 . Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. The 421 SD Tri . Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. 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, We and our partners use cookies to Store and/or access information on a device. Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. [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). The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. Pontiac V8 Engine Tune-Up and Torque Specifications. in., again available only in the GTO and Firebird. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. In 1968, there was also a 350 "HO" which had increased power with the addition of higher compression #18 heads (#17 and #46 were the most common 2-barrel heads), a four-barrel carburettor and matching intake that was also used on the 400 and 428 engines. On this Wikipedia the language links are at the top of the page across from the article title. Like the 421, the 428 used a large-journal crankshaft, but externally it was the same size as all Pontiac V-8s of that era (the later 301 used a shorter deck height). The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. Bore/Stroke ratio: 1.04:1 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]. . Email Email. 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? ][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. The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. 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. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. Displacement began at 287-cubic-inch (4.7L) and grew as large as 455-cubic-inch (7.5L) by 1970. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. Are you thinking of buying a 2007 muscle car, or any other car? Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. 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). 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. 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 . One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. Seat pressure: 110 pounds at 1.600-in 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. It also sports the four-speed manual, limited . It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. Power output ranged from 135hp (101kW) to 170hp (127kW). 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 . Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). On premium fuel, it was rated at 207 hp at 5200 rpm and . Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. 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. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. Once corrected the SD-455 was recertified and was released for production in late April 1973.

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