The compression ratio will be 10.6:1. The base engine was the 421 four-barrel with 338 horsepower. Preparation: File-fit for end gap if needed, wash A limited-slip differential and gearing up to 4:11.1 were optional. Specifications listing with the performance factory . 1966 Pontiac Ventura Specifications. 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. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. 1962 421 super duty motor Price $30000.00. 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. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). Projects - 1964 PONTIAC 421 HO Engine Build | The H.A.M.B. Information and specs for the Pontiac 421 V8 engine. For 1971, Pontiac introduced another High Output (HO) version with standard internal parts, a reinforced block with four-bolt main bearing caps, and improved cylinder head design with 18-inch taller (3.2mm) intake ports and special round exhaust ports for better breathing, yet still making just 335hp (250kW) gross (or 310hp (231kW) in the more accurate SAE Net system). Seat pressure: 110 pounds at 1.600-in Your definitive 1964-67 Pontiac GTO buyer's guide - Hagerty The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. 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. 301 4-barrel 'W72' or 'ESC' (170hp, 127kW) (with the 5th character of the VIN being a "W" for 1979-1980 and the 8th for 1981). Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. The consent submitted will only be used for data processing originating from this website. [22]. 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. Manage Settings Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS To determine horsepower from airflow, invert the equation: It also sports the four-speed manual, limited . The Pontiac Tri-Power Story | Mac's Motor City Garage 1966 Pontiac GTO. The 1975 455 HO package received some negative press/reviews as some buyers expected to see a return of the 1971-1972 engine, and were disappointed when they received the lower output motor. All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. 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. [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. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). 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. The 1971 455 HO was rated at 335hp (250kW) @ 4,800rpm and 480lbft (651Nm) of torque @ 3,200rpm (gross). 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. 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. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? 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 It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. Primary tube length: approximately 31.00 inches of torque at 3,800 RPM in the GTO, and 340 HORSEPOWER at 5,300 RPM and 430-lb.ft. Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. Length: 8.750-inCAM The four-barrel 400 was a popular performance option for many of Pontiac's cars. Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. This simply meant that Pontiac installed both the SD-389 and SD-421 into vehicles on its assembly line. Where else will the extra 100 horses come from? which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. Pontiac V8 Engine Codes and Specs - WOW Muscle Cars Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. The 1955-up Pontiac V8 that finally reached the public was an overhead valve engine with cast iron cylinder heads and block and wedge-shaped combustion chambers. The W72 was only available for a very short time, with the majority of 1979 model year W72 Firebirds ordered in late 1978. 1966 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA : 389: 8.6:1: 256: Manual: 91: 254: 2 bbl: WB . 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. There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. pontiac timing ???????? | The H.A.M.B. For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. 1966 Pontiac Catalina 421 H.O. Gives New Meaning to the Term 'Full Floater' ARP - The Official Site | Pontiac Kits Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . The SD-389 was limited to a single 4-barrel while the SD-421 used dual 4-barrels. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. While all this sounds great, remember the engine will have to retain the small 1.92-inch intake valve because chamber space is too tight for larger ones. 421 H.O. Tri-Power Engine Build - Part 1 - High Performance Pontiac Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor Along with the HO it also had Pontiac's famous cast-iron "headers", which were much better at reducing backpressure than the regular manifolds. Pontiac 421 V8 Specs, Firing Order and Engine Information - Engine Facts One of the key upgrades were the 6x4 heads. Pontiac Heads - Butler Performance Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. Every torque specification should be in this table, however if there is one missing, please Contact Me and I will get you the spec and add it to the table. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. Duration at .050: 247/252-deg 744) and a new valve spring package with dampers to positively control valve action. The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. 18 watchers Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). The heads were a new design featuring siamesed intake ports. This was underrated at 330hp (246kW). . The most valuable Pontiac GTO is the 1969 Judge convertible with the 370-hp Ram Air IV engine. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. 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. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). 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. 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. It included a new camshaft with duration increased from 288/302 (No. The Block Date Code represents the production date of the engine. Rod/Stroke ratio: 1.65:1BOTTOM END 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. 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]. A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. The Armasteel cast crankshaft was the standard hardened cast-iron crankshaft used throughout the entire Pontiac V-8 line until 1967. The 1979 Firebird model line was the last year for the Pontiac 400, and by this point not only was it required with the 4-speed manual transmission, it also required the WS6 Special Handling Package as mandatory equipment. Get the best deals on Engines & Engine Parts for 1966 Pontiac GTO when you shop the largest online selection at eBay.com. In 1968 the 326 was replaced by the similarly 389-derived 350, which used a 3+78in (98.4mm) bore and 3+34in (95.3mm) stroke for a total displacement of 353.8cuin (5,798cc). Only about 400 were produced before the fuel injection system was quietly dropped. Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM The concept car Pontiac Strato-Streak was used to introduce the V8 and in later years the engine was installed in Pontiac products. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. [4] It was replaced by the 455 for the 1970 model year. 068) to 301/313 (No. . Mechanical advance: 36-deg at 3,200 rpm Pontiac V8 Engine Tune-Up and Torque Specifications. 5 January 2007. The 1968 Ram Air II remained at 400 cu. 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. ", https://tran-zam.com/fhistory/1977Engines.aspx, "Hitman's Pontiac Trans Am Site - WS6 and WS7", https://tran-zam.com/fhistory/1978Engines.aspx, https://tran-zam.com/fhistory/1975Engines.aspx, "Unsung Muscle: '75 455 HO Pontiac Trans Am", https://tran-zam.com/fhistory/1981Engines.aspx, "Directory Index: Pontiac/1967 Pontiac/1967_Pontiac_Performance_Brochure", "609ci Pontiac Ram Air V - Chief Stomp 'Em", Pontiac experimental V8 427 Hemi TOHC Tamrazs Parts (800) 442-4601, "McKellar's Masterpiece: The Pontiac Overhead Cam 421 V8", https://en.wikipedia.org/w/index.php?title=Pontiac_V8_engine&oldid=1136467635, Articles needing additional references from January 2010, All articles needing additional references, Articles that may contain original research from October 2016, All articles that may contain original research, Articles needing cleanup from September 2022, Articles with bare URLs for citations from September 2022, All articles with bare URLs for citations, Articles covered by WikiProject Wikify from September 2022, All articles covered by WikiProject Wikify, Articles with multiple maintenance issues, Articles with unsourced statements from December 2008, Articles with unsourced statements from April 2021, Articles with unsourced statements from February 2018, Wikipedia articles needing clarification from April 2021, Articles with unsourced statements from July 2016, Articles that may contain original research from September 2018, Articles with unsourced statements from March 2018, Articles to be expanded from February 2020, Articles with empty sections from February 2020, Creative Commons Attribution-ShareAlike License 3.0, 7.9:1, 8.0:1, 8.4:1, 8.5:1, 8.6:1, 8.9:1, 10.0:1, 10.25:1, 10.5:1, 10.75:1, 11.0:1, Two-barrel carburetor, 7.9:1 compression, 192hp (143kW) @ 4400rpm, 297lbft (403Nm) @ 2800rpm, Four-barrel carburetor, 8.9:1 compression, 216hp (161kW) @ 4800rpm, 315lbft (427Nm) @ 2800rpm, Two-barrel carburetor, 8.9:1 compression, 205hp (153kW) @ 4600rpm, 294lbft (399Nm) @ 2600rpm, Four-barrel carburetor, 8.9:1 compression, 227hp (169kW) @ 4800rpm, 312lbft (423Nm) @ 3000rpm. 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 . The 421 badging was standard on the 2+2, the 421 H.O. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. designs, the SD-455 was a much improved engine. Pontiac V8 Engine History: 1955-1981 1966 Pontiac GTO - Muscle Car Facts 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. 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. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. 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. Crank: Original '64 421 Piston pins: Icon, SAE 1016 to 1022 Note the tri-color Pontiac Ventura upholstery. 1966 Pontiac 2+2 Convertible 1966 Pontiac 2+2 Convertible 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. Pontiac first offered three two-barrel carburetors in 1957 and the Tri-power set up was an option on the GTO from 1964-66. 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. Pontiac offered this to the public as a streetable version of the 421 SD. 1966 Pontiac 2+2: A Profile of a Muscle Car | HowStuffWorks Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. Pontiac's 428 was a sneak attack in the muscle car horsepower wars The V8 engine was introduced for the 1955 model year as the "Strato Streak". 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 . like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. A History Lesson in Pontiac V8 Power - Engine Builder Magazine Two tri-power 421s were optional, one with 356 bhp, the other with 376. - P.Top - Correct Exterior/Interior. Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. Engine displacement is a function of bore and stroke. Building a rare Pontiac Catalina Royal Bobcat piece by piece Pontiac Blocks Casting Information - Butler Performance 093: 66 389 GTO: 65 . 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. Read. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. Though never factory-installed in any car, the ultimate engine of the Ram Air line of engines was the tunnel-port Ram Air V. In 1969 Pontiac created four versions of the Ram Air V engine: a 303cuin (5.0L) short deck version for SCCA Trans-Am racing, a 366cuin (6.0L) variant for NASCAR, a 400cuin (6.6L) version for street use in GTOs and Firebirds, as well as a 428cuin (7.0L) adaptation for drag racing. The 338-bhp four-barrel was the base engine. The goal of making a Pontiac Hemi succeeded but the engine was never produced. 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 1961 the Pontiac V-8 (389 and 421) was dubbed the Trophy V-8, due to its many victories in racing. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. Pre-Owned. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. 4/21: Not just a date, but a legendary 421-cid Pontiac engine that 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. Block description: '64 421ci #157 The 428 was factory installed in large cars only. With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: It was rated at 475hp (354kW). 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. 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. Pontiac RAIII/IV Engine parts collection Price $14000.00. A panel covers the dash opening where the radio would have been on a standard Catalina. This resulted in a lightweight design weighing less than the Chevrolet small-block V-8. SPECIFICATIONS. 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. . Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model.
