1966 pontiac 421 engine specsmarc bernier funeral arrangements

What is important is the total timing, the . 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. Maximum flow at 28 inches of water 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. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. First offered as an option in 1963, the 421 HO came in a 4-barrel engine of 320hp (239kW) and one Tri-Power H-O version with a hotter cam and efficient iron exhaust manifolds and rated at 370hp (276kW). The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. Maximum RPM (high-RPM engine): over 8000 rpm, Engine weight: estimated 550lb (249kg) complete, Power: estimated 640hp (477kW) at 7500rpm, This page was last edited on 30 January 2023, at 13:15. For the 1967 GTO the engine was rated at 360bhp (268kW; 365PS) and had the cast-iron headers. The 301 Turbo package mandated air conditioning, the THM350 (sometimes referred to as the CBC350 in various literature) non-lockup automatic transmission (THM350C lockup in 1981 Trans Ams), and 3.08 rear axle gearing. The 421 was first availabe in a SD (Super Duty) model that was built for racing. Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. Block/Crank combo: '64 four-bolt 421 / '64 OE 4.00-in stroke 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. Lift: 0.515/0.525 with 1.6:1 rockers . . The compression ratio will be 10.6:1. The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. Bolts or Parts: Lube or Sealer: Torque to: Main Caps. The four-barrel 400 was a popular performance option for many of Pontiac's cars. One of the key upgrades were the 6x4 heads. 1966 Pontiac Catalina Specifications and Production. The mighty Pontiac 421 was a star on the drag strip and a super nova on the Nascar tracks of the first half of the 60s. 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 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. SPECIFICATIONS. The consent submitted will only be used for data processing originating from this website. 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. What was most interesting about the 421 engine in the beginning was that it was a dealer installed option only known as the SD (Super Duty) 421. It included a new camshaft with duration increased from 288/302 (No. A mere five were built, all with a four-speed transmission. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. designs, the SD-455 was a much improved engine. The 1969 HO 350 HO was equipped with the 400cuin (6.6L)'s large valve heads (# 48's) and the 400 HO camshaft and rated at 330hp (246kW). 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. 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. Preparation: File-fit for end gap if needed, wash Pontiac Engine Torque Specs Pontiac Engine Torque Specs. 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". The Block Date Code represents the production date of the engine. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . The first of the "big journal" Pontiac V8s, it had a bore and stroke of 4+332in 4in (104.0mm 101.6mm) and came with dual four-barrel carburetors. These are general guidelines. He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm. Horsepower: See Part 2 This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. 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). Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). Continue with Recommended Cookies. The short-deck block and different intake ports also required the design of a new intake manifold. The Fresh Air package continued into the 1966 model year. Though production cars only got the two hood air inlets the name was retained. Rocker studs: ARP special 34-in bottom Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. Not where most enthusiasts go first. 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). 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . 5 January 2007. 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. Intake: 218 cfm at 0.500-in Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. This was a project started with the end goal of building a 427 Hemi. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. 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). 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. Preparation: Wash after balance for assembly In addition, a shallower spherical-wedge combustion chamber moved the tuliped valve heads .040" closer to the piston at TDC, improving mixture draw considerably during the intake stroke. 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. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins Valve guides: K-Line, liners It requires a compression ratio of at least 10.25:1. Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. It was rated 180hp (134kW) @ 4600rpm and 264lbft (358Nm) @ 2400rpm with a two-barrel carburetor, 200hp (149kW) @ 4600rpm and 278lbft (377Nm) @ 2800rpm with the four-barrel carburetor. Available only in the 1973 and 1974 Firebird Formula and Trans Am, the SD-455 consisted of a strengthened cylinder block that included 4-bolt main bearings and additional material in various locations for improved strength. 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. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. Mods: Built to factory specifications/ adapt '64 choke to '66 center carburetor Still, it was the strongest American engine offered that year. Unlike previous enlargements of Pontiac V8s, it did not replace the 389. Rings: LPC (Liberty Performance Components) premium moly, standard tension For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). Fuel pump: Will use 110-gph Carter [4] It was replaced by the 455 for the 1970 model year. Pontiac listed the 290hp (216kW) rating at 4000 rpm for a motor that had a 5700rpm redline on the factory tachometer. An evolution of the RA IV and H.O. 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 389 was the standard engine on the GTO up to 1966. Primary tube diameter: 1.75-in 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). However, in the June 1974 issue of SUPER STOCK AND DRAG ILLUSTRATED, a new 1974 Trans Am with the SD-455 motor ran 14.25 @ 101mph (163km/h). The W72 offered many improvements over the standard L78 400 Pontiac. Beep, beep! From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. Price $15500.00. It was renamed 428 HO for 1968. 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]. 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 421 engine is available only with related heavy-duty driveline components. It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. 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. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. for 1980, and the 8th being a "T" for 1981). VEHICLE TYPE . The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. In 1977 the 400-cubic-inch (6.6L) T/A 6.6, (RPO code W72) was created to fulfil the performance engine gap in the Pontiac line-up. Both Randy and Stan were aware of the . Free shipping on many items | Browse your favorite brands | affordable prices. Pontiac planned to produce the 1953 models with the V8, but Buick and Oldsmobile appealed to GM management and earned a 2-year delay. Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . Head bolts do not pull on the cylinder wall causing distortion. 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." This resulted in a lightweight design weighing less than the Chevrolet small-block V-8. Fuel line size: 38-inch, 516-inch to carburetor There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. 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 . Also bowing in 1967 was the new Firebird, which had the . Update your shipping location. Brand: Fel-Pro head and intake/ SCE pan and timing cover The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. Based in part on designs for the "short deck" 303cuin (5.0L) engine designed for the 1970 racing season, it had a shorter deck than the big V8, and used thin-wall castings to reduce weight. Information and specs for the Pontiac 421 V8 engine. While production of 196970 A-body Ram Air IV cars was low at just 1563 units(759 1969 GTOs including 302 Judges, and 804 1970 GTOs including 397 Judges) 1969 and 1970 model year F-body Ram Air IV cars were even rarer at just 245 total units produced. / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . [citation needed]. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Coil: GM Rocker arms: Crower roller, 1.6:1 Centerline: 110-deg Chamber: Closed, special to PMD, 70 cc We and our partners use cookies to Store and/or access information on a device. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Lobe separation angle: 112-deg 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. 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. Bore/Stroke: 4.150/4.00-in 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 To learn everything you need to know about car engines, see. 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. This was the last run for the 455 (7.5 L) motor from Pontiac, and production ceased on the 455 this year as it could no longer meet the emissions requirements any longer. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . On this Wikipedia the language links are at the top of the page across from the article title. 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. which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. Cam was a #541596 McKellar No. 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 Oil: 95 ft-lbs. It featured the "744" 301/313 camshaft, which offered more duration and overlap than the "HO". According to the June 2019 issue of Muscle car Review magazine, during dyno testing performed during that era, the National Hot Rod Association (NHRA) rated this Pontiac W72 400 T/A 6.6 engine at 260 to 280 net horsepower instead of the 220-hp rating published by Pontiac. The SD-389 was limited to a single 4-barrel while the SD-421 used dual 4-barrels. However, a few dealers would offer them in the GTO or Firebird and do their own installations, such as Royal Pontiac who offered the "Bobcat" conversion. Setting initial timing at idle with the vacuum advance disconnected will usually fall around 12 to 16 degrees, but that's not really important. The engines feature a cast-iron block and head and two valves per cylinder. Kits for Pontiac applications. 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. Bore/Stroke ratio: 1.04:1 For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). It was called the Ram Air IV due to the planned use of four air inlets. Pontiac engineers tested their 269cuin (4.4L) V8 in 1949 or 1950 against an OHV Oldsmobile Rocket V8 303cuin (5.0L) downsized to 270cuin (4.4L). In the 1968 Pontiac GTO it was given a 10.75:1 compression ratio and tuned to deliver 360 horsepower and 445 foot-pounds of torque.[2]. Only about 2000 like this one were built with 4 speed Muncie transmissions. or Best Offer. 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. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . [22]. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Catalina Vista 421HO Trophy V-8 Tri-Power 4-speed in 1964 the model with 4-door hardtop sedan body and V-8 6902 cm3 / 421.2 cui, 276 kW / 375 PS / 370 hp (max) offered since October 1963 for North America U.S. special version. Crank: Original '64 421 Timing chain: LPC, double rollerINDUCTION 1965 Pontiac LeMans GTO Mecum. 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. Collector size: 3.00-inGASKETS Rod/Stroke ratio: 1.65:1BOTTOM END Royal Pontiac's engine swap wasn't a new trick for Pontiac. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm Bearings: Sealed-Power mains and rods, cam Dura-Bond For 1974 another 1,001 (943 Trans Am, 58 Formula) were built, after which the SD-455 was discontinued. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. 1962 421 super duty motor Price $30000.00. Like the 326, it was offered in both 2-barrel and 4-barrel versions. in., again available only in the GTO and Firebird. The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. Casting No. Read. 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. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. The 421 SD Tri . This is the original car featured in the May 1962 issue of Motor Trend Magazine that was modified by Royal Pontiac and driven by Jim Wangers. 1967 - 400 Ram Air Code 97. The most famous S/D of them all. Pontiac ignited the classic muscle car era with a stroke of marketing genius. 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. 1967 was the last year for closed-chambered heads. Transistorized ignition was available. Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. 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, Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. The 428 was factory installed in large cars only. 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. 1962 - 389 SD Code 544127. It also sports the four-speed manual, limited . [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. 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". The 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. 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. 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. That's the factory rating of the legendary 421 H.O. More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. Only one is known to survive today. ft. After the SD-455 was certified with the new cam, it was production-ready but was then further delayed by the EPA mandating Pontiac recertify all of its engines when the EPA discovered that part-throttle emissions exceeded the limits. Size cfm: Total flow, 1,050 cfm Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 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. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. 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. CO2, . According to GM mandates horsepower was now rated in net figures as opposed to gross, so on paper the 1972 455 HO appeared to have a significant drop in power, but in fact it was very much the same engine, and performance figures reveal this to be true. By comparison, the factory 421 H.O. The 421 SD became factory installed in 1962 and in 1963 a street version became available from the factory with a dual four-barrel or three two-barrel Tri-Power carburetion. Pontiac went to open-chambered heads in some 1967 models and all 68 and up to improve power, engine breathing and reduce emissions. The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. 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. Initially marketed as a 287cuin (4.7L), it went on to be manufactured in displacements between 265cuin (4.3L) and 455cuin (7.5L) in carburated, fuel injected, and turbocharged versions. Pontiac first offered three two-barrel carburetors in 1957 and the Tri-power set up was an option on the GTO from 1964-66. 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. 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. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. This was to ensure there was enough fuel to cool the cast offset dished pistons. 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." The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. 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. 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. In 1967, the cylinder head design was improved for the 400 4-barrel engine. 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.. Seat pressure: 110 pounds at 1.600-in Simply put, what good is the power if the engine does not last? 1966 Pontiac 2+2 $64,995. For the truly obsessed, 16 Grand Prixs were built with Pontiac's 421 Super Duty engines, rated at a staggering 370 bhp. 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. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. superior_queens (3,035) 100%. 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). All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. . Math, not gasoline, makes horsepower under the hood of a Pontiac. 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). All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. Super Duty 421s were back, tougher than ever. 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. By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. Note the tri-color Pontiac Ventura upholstery. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in So large are the intake ports that the pushrods run through the center of each port via pressed-in tubes, in addition to streamlined airfoils over the tubes themselves to improve port shape, and increase flow velocity. [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.

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