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). Tri-power engine rated at 376 hp. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm.
1966 Pontiac Gto Glendale, Arizona | Hemmings Pontiac Blocks Casting Information - Butler Performance The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). Given that, it was no accident that the leader in intermediate muscle also put together the finest full-size performance machine -- the 1966 Pontiac 2+2. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. Pushrods: LPC chrome moly Collector size: 3.00-inGASKETS The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. Note the tri-color Pontiac Ventura upholstery. Method used to retain pins in pistons: . Power output ranged from 135hp (101kW) to 170hp (127kW). Even more powerful were the 421 Super Duty V8s that could produce up to 410 horsepower. 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]. Math, not gasoline, makes horsepower under the hood of a Pontiac.
Pontiac's 428 was a sneak attack in the muscle car horsepower wars Some 400s were dealer installed. For 1967 only Pontiac called this engine the Quadra-Power 428. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. Whether all were installed in GTOs is unknown. . Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs 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. Splayed main caps, head bolts tie into main caps. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. If you enjoy the videos and would like to Sponsor me on Patreon, my Creator link is https://www.patreon.com/MyCarStoryWithLouOn "My Car Story" we're in Huntl. See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. 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. In 1967, the Pontiac 2+2 became an option on the . Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". 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. Styling for Status. Along with proper parts selection, accurate machining and assembly are also important 1965 Pontiac LeMans GTO Mecum. Lifters: Crower solid with EDM oil hole (0.024 inch) Displacement began at 287-cubic-inch (4.7L) and grew as large as 455-cubic-inch (7.5L) by 1970. The 338-bhp four-barrel was the base engine. From 1959 to 1966 Pontiac continues making improvements. After outselling Oakland, Pontiac became the sole survivor of the two by 1932. . Along with proper parts selection, accurate machining and assembly are also important. This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. 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. 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. Ram Air induction was optionally available with the 455 HO in the Firebird Formula (standard on Trans Am), and the 2-door LeMans (including GTO). Price $15500.00. This was a project started with the end goal of building a 427 Hemi. Ever wonder what it would take to increase that number by 100? For the 1978 model year, Pontiac re-incorporated the earlier thicker cast cast engine block denoted by the cast number 418988 and a "XX" cast into the side of the block. It shared the 389's 3+34in (95.3mm) stroke, but its bore was 3.78in (96.0mm) for a displacement of 336.66cuin (5.5L). Both Randy and Stan were aware of the . All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 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 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. Model Number: Body/Style Number: Body Type & Seating: Factory Price: . Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. 1967 - 400 Ram Air Code 97. 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. It tips the scales at 3,950lbs. VEHICLE TYPE . 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. Greater throughput mixed with the proper amount of fuel and ignited at the ideal time for the flame to expand against the piston will result in more power. 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. 1966 Pontiac Engine Data Location Of Engine Code: (Six-Cyl) - On cylinder head-to-block contact surface behind oil filter pipe. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. 068) to 301/313 (No. Along with the HO it also had Pontiac's famous cast-iron "headers", which were much better at reducing backpressure than the regular manifolds. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. Modified versions of this engine were extensively used in NASCAR stock car racing and drag racing competition. . Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. 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.
Your definitive 1964-67 Pontiac GTO buyer's guide - Hagerty 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. In the 1960s the popular 389cuin (6.4L) version, which had helped establish the Pontiac GTO as a premier muscle car, was cut in half to produce an unusual, high-torque inline four economy engine, the Trophy 4. 1969 - 400 Ram Air III or 350HO Code 48. Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM 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. 1967 was the last year for closed-chambered heads. I don't know if it can be done, but I'm going to try." Super Duty 421s were back, tougher than ever. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. CO2, . 1962 421 super duty motor Price $30000.00.
1965-'66 Pontiac Catalina 2+2 | Hemmings If you've been thinking about cruising the local boulevard in a classy convertible, but find yourself longing for the power under the hood that only a muscle car provides, perhaps it's time to take another long look at Pontiac's restyled 1965 Bonneville convertible. The Block Date Code represents the production date of the engine. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. From a performance perspective, the 2+2 is pretty impressive. 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). 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. Two tri-power 421s were optional, one with 356 bhp, the other with 376. Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm
Lot S152 1962 Pontiac Super Duty 421 405 HP 4 Speed - YouTube 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). Preparation: Wash after balance for assembly Free shipping on many items | Browse your favorite brands | affordable prices. 1962 - 389 SD Code 544127. 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. By comparison, the factory 421 H.O. Primary tube diameter: 1.75-in 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.
McKellar's Masterpiece: The Pontiac Overhead Cam 421 V8 Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). The W72 offered many improvements over the standard L78 400 Pontiac. Transistorized ignition was available. 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. These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number.
Stock Pontiac Head Specs - Ron's Pontiac Page 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. The engines feature a cast-iron block and head and two valves per cylinder. Engine Oil: 95 ft-lbs. said the "Pontiac 421 cu. Vacuum advance: Not usedEXHAUST In addition to the more refined cylinder heads, block casting reinforcements in the lifter galley and main bearing oil pan rail area, it had forged connecting rods with larger 716-inch-diameter (11mm) bolts. 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. The 421 SD Tri . 1966 Pontiac GTO. All GTOs built from 1964-66 were powered by a 389-cubic-inch V-8 with 10.75:1 compression. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). Optional was the obligatory four-speed manual or new-for-1965 Turbo-Hyramatic three-speed automatic. In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). Some production test cars ran considerably slower and yielded 14-mile (402m) times in the 14.5 second/98mph (158km/h) range in showroom tune (uncited sources)- results that are quite consistent for a car with a curb weight of 3,850 pounds (1,746kg) and the rated 290hp (216kW) SAE NET figure that some sources suggest was "under-rated." aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. However, it can easily be determined by examining the cost price of the option, where the package excluding the W72 engine cost $251, and with the engine, cost extra at $324.[10]. In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. The 1971 455 HO was rated at 335hp (250kW) @ 4,800rpm and 480lbft (651Nm) of torque @ 3,200rpm (gross). SPECIFICATIONS. Compression Ratio: 10.6:1 effective All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. . Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964.
1966 Pontiac Catalina - conceptcarz.com [11] By mid-1978, the W72 could no longer be ordered in conjunction with the MX1 3-speed Turbo-Hydramatic 350 automatic transmission, and could only be ordered with the 4-speed manual transmission. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. The camshaft was also revised to have a slightly higher duration, the carburettor jets tuned and a dual exhaust was implemented allowing the power to increase to 220hp (223PS; 164kW) at 4000 rpm and 320lbft (434Nm) of torque at 2800 rpm. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). It also sports the four-speed manual, limited . Required airflow at 28 in/H2O = HP/ # of cylinders/0.257
Pontiac V8 Engine History: 1955-1981 Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). The short-deck block and different intake ports also required the design of a new intake manifold. Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. 1966: 421: 9782611 (late) 1967-1969. 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.
Muscle Cars You Should Know: 1964-67 Pontiac 2+2 Laconic would be one way to describe this Pontiac's eBay listing, all it states is, "1966 Pontiac Ventura, 421 Tri-Power, 4 speed Runs/ Drives Great, Very Clean - Garage Kept".OK then, now you know what I know. A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. Length: 8.750-inCAM 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. Information and specs for the Pontiac 421 V8 engine. Type Size Carb Horse Power Tourqe; Tri-Power: 389ci: 3x2bbl: 360 hp @ 5200 rpm: 424 lb-ft @ 3600 rpm: Base 8 . Pontiac's SCCA Trans-Am program was promising, with race-ready engines producing 475hp (354kW) to 525hp (391kW), however the series General Competition Rules required the manufacturer to produce no less than 250 vehicles with the 303. Federal emissions standards and the drive towards "corporate" engines shared among all GM divisions led to the progressive demise of the Pontiac V8 through the late 1970s. 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. Crank: Original '64 421 Pontiac Engine Torque Specs Pontiac Engine Torque Specs. The 1970 '455 HO' was a conventional "D" port engine. The goal of making a Pontiac Hemi succeeded but the engine was never produced. The consent submitted will only be used for data processing originating from this website. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. . superior_queens (3,035) 100%. This was the only Poncho with standard 421-cid power.
1966 Pontiac 2+2 Convertible 1966 Pontiac 2+2 Convertible The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. [citation needed]. Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. Melling PN M54D with 60 psi spring, made 70 psi at 6,000 rpm with 30W oil 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. 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. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . 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. The Ram Air II also incorporated the first computer-designed camshaft. In addition to the inline 6, Pontiac used the Oakland V8 for one year, 1932, debuting the Pontiac straight-8 engine in 1933. From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. From 1969 though 1970, the Ram Air IV was available in both A-Body (GTO, including Judge) and F-body (Firebird, including Trans Am) form. Pontiac . We and our partners use cookies to Store and/or access information on a device. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . Upon reflection, many did not consider that it was the only large displacement engine still on offer for any performance car on the market, and reconsidered Pontiac's position between the rising CAFE emissions restrictions.[14]. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. All 1977-1978 Trans Ams ordered with the 4-speed Borg Warner Super T-10 manual transmission received the W72 T/A 6.6 engine. Though airflow is paramount in making power, there are other aspects of the engine that are just as important. It was factory rated at 366hp at 5,400 RPM and 445lbs.ft. Offered from 1967 to 1969, it produced 360 and 376hp (268 and 280kW) in 1967, 375 and 390hp (280 and 291kW) in 1968 and 360,370 and 390hp (268,276 and 291kW) in 1969. Primary tube length: approximately 31.00 inches
Projects - 1964 PONTIAC 421 HO Engine Build | The H.A.M.B. 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.
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