1966 pontiac 421 engine specs

which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. The Ram Air IV used the Ram Air II's camshaft but lift in the Ram Air IV was increased to 0.52in (13mm) thanks to the use of 1.65 ratio rocker arms (vs 1.50). It was called the Ram Air IV due to the planned use of four air inlets. Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. Once corrected the SD-455 was recertified and was released for production in late April 1973. The short-deck block and different intake ports also required the design of a new intake manifold. . 1966 Pontiac GTO. Distributor: '61 Delco cast-iron with direct oiling . For 1974 another 1,001 (943 Trans Am, 58 Formula) were built, after which the SD-455 was discontinued. Optional was the obligatory four-speed manual or new-for-1965 Turbo-Hyramatic three-speed automatic. 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). Year: CU IN: Casting # 1967: 326. To determine horsepower from airflow, invert the equation: It retained the 421's 4in (101.6mm) stroke and 3+14in (82.6mm) main journal. Lift: 0.515/0.525 with 1.6:1 rockers 1967 was the last year for closed-chambered heads. [citation needed] It was the first engine that incorporated Pontiac's round-port head design in a production vehicle, however the intake port was the same as other D-port heads, leaving a head which exhaust port could nearly match the intake at high valve lifts. It was renamed 428 HO for 1968. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. Stating in 1962 the "421" and the "421 SD" engine became available as a factory option until 1966. 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). By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. For 1970 the Trans Am was the only Firebird available with the Ram Air IV, and 88 were produced during the abbreviated 1970 F-body production run. The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. With a view to the latter, what we find lurking under the hood is the 421ci Tri-Power V8. The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. In 1968, a 320hp (239kW) HO option was offered in the Tempest and Firebird. Standard in the Firebird Trans Am, it was still a rare engine. Here are features on more than 100, Muscle cars created their own culture. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. Standard ratio with the 400 was 3.55:1(except 3.36:1 in Firebird for 1969) regardless of transmission(3.23:1 for cars with air conditioning). The V8 engine was introduced for the 1955 model year as the "Strato Streak". Simply put, what good is the power if the engine does not last? In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. 093: 66 389 GTO: 65 . A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). By comparison, the factory 421 H.O. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. Returns; . In 1969, Pontiac unveiled its Trans Am model Firebird, and since racing rules required engines of less than 5L (305.1cuin), Pontiac unveiled the 303 for racing models only, never available to the public. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). Update your shipping location. The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. Both Randy and Stan were aware of the . 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. ENGINE. In 1967, the cylinder head design was improved for the 400 4-barrel engine. Casting No. It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. 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. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . 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). 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 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. From a performance perspective, the 2+2 is pretty impressive. 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. Oil pan: 8-quart with extended pick-up, fabricated retention clamp Only one is known to survive today. For 1967 only Pontiac called this engine the Quadra-Power 428. Beep, beep! More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. This was based on results of over 1 million test miles, which was unheard of at the time. This was underrated at 330hp (246kW). designs, the SD-455 was a much improved engine. NASCAR race cars embody the muscle car philosophy of power. This included the ESC (Electronic Spark Control) distributor and controller borrowed from the 301 Turbo, which allowed for higher timing without the penalty of engine damaging pinging or preignition. 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]. 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). Head bolts do not pull on the cylinder wall causing distortion. All GTOs built from 1964-66 were powered by a 389-cubic-inch V-8 with 10.75:1 compression. This is it! Free shipping on many items | Browse your favorite brands | affordable prices. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). Crank: Original '64 421 Rocker studs: ARP special 34-in bottom 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. The four-barrel version, set up for sustained high speeds, had 390 hp. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). 18 watchers The 421 SD Tri . Rings: LPC (Liberty Performance Components) premium moly, standard tension Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. We and our partners use cookies to Store and/or access information on a device. 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. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. or Best Offer. Pontiac . Simply called "Ram Air" by Pontiac[17] it was the first in a series of engines available from Pontiac as regular production line options and officially called Ram Air. Both used a single two-barrel carburetor. 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). This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. (V8) - Stamped on right front side of block or beneath production . Using an equation the author has provided in HPP many timesmost recently with The Mule engine seriesit was revealed that around 228.6-cfm flow though the intake port of the cylinder head is required to produce the desired 470 hp. The Ram Air II also incorporated the first computer-designed camshaft. Pontiac produced the 421 V8 engine from 1961 to 1968. Horsepower: See Part 2 Piston-to-deck height: 0.009-in Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). The 428 was factory installed in large cars only. To learn everything you need to know about car engines, see. Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. 744) and a new valve spring package with dampers to positively control valve action. 1963 - 389 SD Code 543797. and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). Other dimensional factors such as the wheel base, curb weight and length were largely unchanged. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). - P.Top - Correct Exterior/Interior. Note the tri-color Pontiac Ventura upholstery. The camshaft was the HO cam with 288/301 duration. Year: CU IN: Casting # 1967: 326. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Pushrods: LPC chrome moly However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. It added '421' engine badges on the front fenders, 2+2 insignia on the deck lid and rear fenders, and simulated louvers behind the front wheel cutouts. As Pontiac still wanted to offer a performance motor to compete in the performance market, they looked back to the 400 Pontiac and how it could be improved to offer greater performance while meeting CAFE standards. Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. For those who may not be familiar with the equation, here it is again: By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). in. (imp.) 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. Valve guides: K-Line, liners Primary tube diameter: 1.75-in 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. 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. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. 1966: 421: 9782611 (late) 1967-1969. 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. 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. The initial press cars that were given to the various enthusiast magazines (e.g. Sponsored Stories . The consent submitted will only be used for data processing originating from this website. 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. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. This installment includes the assembly and parts selection up to the long-block. The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. Email Email. The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. Ram Air induction was optionally available with the 455 HO in the Firebird Formula(standard on Trans Am), GTO (standard with "The Judge" package), and 2-door LeMans Sport when the T41 Endura Styling Option was also ordered. 1969 - 400 Ram Air III Code 62. That's the factory rating of the legendary 421 H.O. Preparation: Weigh, soap-and-water wash Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. Bore/Stroke ratio: 1.04:1 Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. Maximum flow at 28 inches of water Ram Air induction was optional in the GTO, though power ratings were unchanged. Though airflow is paramount in making power, there are other aspects of the engine that are just as important. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . 400 Ram Air (1969) / Ram Air (1970), aka Ram Air III, Learn how and when to remove these template messages, Learn how and when to remove this template message, "Tested: 1968 Pontiac GTO 428 / Royal Bobcat", "1969 Pontiac Grand Prix 428 specifications | technical data | performance | fuel economy | emissions | dimensions | horsepower | torque | weight", "Muscle Car Horsepower How Exaggerated Was It? 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. Secondary: Front and rear #70 / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . There were a few 1962 Grand Prix models that came with a 421 SD from the factory so if someone is lucky enough to have one today then they have a car that is probably worth some decent money simply because of the rarity of these models.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[580,400],'enginefacts_com-medrectangle-3','ezslot_2',115,'0','0'])};__ez_fad_position('div-gpt-ad-enginefacts_com-medrectangle-3-0'); Engine Facts 2023. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 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. In 1967, the Pontiac 2+2 became an option on the . The most valuable Pontiac GTO is the 1969 Judge convertible with the 370-hp Ram Air IV engine. This resulted in a lightweight design weighing less than the Chevrolet small-block V-8. Prices ranged from $2,760 to $3,220 . 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. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Only about 2000 like this one were built with 4 speed Muncie transmissions. 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 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . 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. Two tri-power 421s were optional, one with 356 bhp, the other with 376. (imp.) 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 cylinder heads on the 400 CID version had an intake port volume of 290cc (17.70cuin), nearly twice the size of a typical standard D-port Pontiac head - and flowed in the area of 315cuft/min (8.9m3/min) @ 0.8in (20mm) valve lift; in the realm of the NASCAR-dominating Chrysler 426 Hemi. The goal of making a Pontiac Hemi succeeded but the engine was never produced. A total of 1,808 Ram Air IV production cars were built over its 2-year production. Here are my top six rationales for admiring the 1966 GP. 1967 - 400 Ram Air Code 97. Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. Fuel line size: 38-inch, 516-inch to carburetor Continue with Recommended Cookies. The 1970 '455 HO' was a conventional "D" port engine. 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. 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. [9], The W72 engine was standard in all 1977 Pontiac Can Ams (bar the 1977 Can Ams sold in California/High Altitude states which received the L80 Oldsmobile 403) and was optional in all 1977-79 Pontiac Firebird Formula and Trans Am models. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . 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 . Example: A128 = January 12, 19*8. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. of torque at 3,600 RPM in the Firebird, with only a small throttle restrictor tab on the Firebird being different. Keepers: Comp Cams race locks Vacuum advance: Not usedEXHAUST ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm superior_queens (3,035) 100%. Reductions in reciprocating weight free up horsepower. . The engine was available in all full-size Pontiacs. 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. [19], Parts for Ram Air V engines are not readily available. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964.

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1966 pontiac 421 engine specs

1966 pontiac 421 engine specs