1966 pontiac 421 engine specs

Kits for Pontiac applications. A limited-slip differential and gearing up to 4:11.1 were optional. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. Spiral clip By comparison, the factory 421 H.O. All 1980 Trans Ams received this engine as standard with the option to delete this engine choice as a credit option for the standard L37 301. Some 400s were dealer installed. The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. Rings: LPC (Liberty Performance Components) premium moly, standard tension Crank: Original '64 421 Rocker arms: Crower roller, 1.6:1 The 2+2 package was first offered as a $291 option on Catalina hardtops and convertibles in 1964. Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs Brand: Fel-Pro head and intake/ SCE pan and timing cover The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. This was to ensure there was enough fuel to cool the cast offset dished pistons. The initial press cars that were given to the various enthusiast magazines (e.g. Head ID Location Along with being cheaper to build, this allowed more consistent valve action with less weight than a conventional shaft. By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. This was underrated at 330hp (246kW). This installment includes the assembly and parts selection up to the long-block. Even more powerful were the 421 Super Duty V8s that could produce up to 410 horsepower. Read. Rear Main Cap. Size cfm: Total flow, 1,050 cfm SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. A total of 1,808 Ram Air IV production cars were built over its 2-year production. 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 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. This may have been propagated by the only authorized company that is licensed to reproduce these decals not including the "6.6 LITRE" in the Trans Am decal kits, and only including "T/A 6.6" with no extra cost. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . Pontiac produced the 421 V8 engine from 1961 to 1968. The Ram Air II also incorporated the first computer-designed camshaft. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. Two different cylinder-head castings were used for the 1962 model year, both with a combustion chamber volume of 68cc (4.15cuin) to produce an 11.0:1 compression ratio. designs, the SD-455 was a much improved engine. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. 1963 - 389 SD Code 543797. . Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. 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? Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. Wires: NAPA Belden 7 mm 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. Math, not gasoline, makes horsepower under the hood of a Pontiac. Length: 8.750-inCAM In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Valves: Competition Products stainless steel, 1.92 /1.66-in The last "true" Pontiac V8s, a 265 and 301cuin (4.3 and 4.9L), ended production in early 1981. While not related to the 400 W72, the concept was the same. 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. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. Fuel pump: Will use 110-gph Carter The engine compartment of this concours Catalina is beautifully finished. 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. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. Located at the back of the engine near the Distributor. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. 1966: 421: 9782611 (late) 1967-1969. 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. Transistorized ignition was available. Neither casting was equipped with an exhaust crossover. 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). 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.. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. These same heads were also used on the 1964 GTO 389 tri-power engines. The four-barrel 400 was a popular performance option for many of Pontiac's cars. Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . By comparison, the factory 421 H.O. engine, dual exhausts, three-speed manual transmission, Hurst shifter, 3.42:1 rear gears, heavy-duty suspension, bucket seats, upgraded upholstery, carpet, emblems, "Decor" louvers, pinstripes, lower . It featured a smaller bore of 3+34in (95.3mm) coupled with the same 3in (76.2mm) stroke of the 301 (same bore and stroke used by Chevrolet when the first small block motor was introduced in 1955). Balancer: Original PMD rebuilt by Damper Doctor The next 1 or 2 numbers represent the date, and the last number is the year. [22]. Lobe separation angle: 112-deg From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. 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. 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. The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. 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. 1968 - 400 Ram Air II Round Port Code 96. It was renamed 428 HO for 1968. 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. Royal Pontiac's engine swap wasn't a new trick for Pontiac. It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. While the 400 offered excellent power in the GTO (360 horses and 445 lb-ft of torque in 1968), Pontiac turned to what it called 'big journal' engines for the muscle machine's next upgrade. The other major difference between the "typical" Pontiac engine of the time was that this one used the large . However, the 1959 389 engines had the generator in front of the heads with reverse flow cooling still in use. 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 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. 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. Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish It retained the 421's 4in (101.6mm) stroke and 3+14in (82.6mm) main journal. Optional power was the 421/356 with Tri-Power or the 421 HO putting out 376 horses with Tri-Power. The overhead-cam six-cylinder engine was new for 1966 and the standard engine in the Tempest and Tempest Custom. . 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. 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. 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. Both Randy and Stan were aware of the . 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. 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. View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. This new material had stronger alloys in the iron. For 1969-1970 GTO the 400 HO included driver operable Ram Air induction and was renamed "400 Ram Air" for 1969 and just "Ram Air" for 1970. Price $30000.00. 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. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. 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). aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". The manuals had Hurst shifters. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". Math, not gasoline, makes horsepower under the hood of a Pontiac. 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. 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. 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 . Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. A three-speed stick was standard; a four-speed and automatic cost extra. engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . 1963 Pontiac V8 Engine Specs. Specifications listing with the performance factory . This simply meant that Pontiac installed both the SD-389 and SD-421 into vehicles on its assembly line. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. Pontiac Engine Torque Specifications. Initial advance: 18-deg Final torque ratings may vary and need to be determined based on application and parts used. . Intake: 218 cfm at 0.500-in [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. All Rights Reserved. The 389 was the standard engine on the GTO up to 1966. 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. The W72 offered many improvements over the standard L78 400 Pontiac. $6.49 shipping. This 1966 Pontiac 2+2 Convertible is a beautifully restored big-block convertible that is ready for some boulevard cruising! It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. It tips the scales at 3,950lbs. Carb: (3) Rochester two-barrels PMD or Best Offer. (imp.) The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. It's well documented that an internal combustion engine is nothing more than an air pump. Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. It was called the Ram Air IV due to the planned use of four air inlets. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. 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. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. The 421 Super Duty had been the first of these, and their large bore and stoke made them popular in NHRA and NASCAR competition throughout the '60s. The Fresh Air package continued into the 1966 model year. Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. [4] It was replaced by the 455 for the 1970 model year. In 1967, the Pontiac 2+2 became an option on the . The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. Now select an engine model (if applicable) -- Pontiac Engine Models -- All Pontiac Kits 151 301 326 350 3800 389 4-cylinder 400 421 428 455 Brodix Heads Edelbrock Heads Iron Duke L67 Pro Stock Dart Heads Pro Stock Heads Ram Air Runner Heads Super Duty Generic V8. 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). Method used to retain pins in pistons: . SELLER Glendale, Arizona 85305. The 421 SD Tri-Power engine offered during these years produced the highest horsepower of any motor in the Pontiac V8 lineup at 376 bhp. Year: CU IN: Casting # 1967: 326. 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. Engine Oil: 120 ft-lbs. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. These motors were built mainly for NASCAR or other racing purposes and were equipped with all the extra racing goodies that people were looking for. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. 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 Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). 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." 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". Retainers: Crower steel 287. Preparation: File-fit for end gap if needed, wash This test would tend to lend credence to the CAR AND DRIVER and HOT ROD tests of 1973 Super Duty cars with 3.42 gears, no air, and 160lb (73kg) less weight as being representative of production specimens capable of mid to high 13-second passes at 104mph (167km/h). 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." . The engine build will be discussed in two parts. [citation needed]. Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in . 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. 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 . 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]. Simply put, what good is the power if the engine does not last? [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. CO2, . For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. The W72 Performance Package also included an upgrade to the rear differential ratio, setting the rear gear ratio to 3.23 for all 1977 and 1979 W72 Firebirds, with the exception being 3.42 for 4-speed equipped W72 Firebirds in 1978 only. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. 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. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. It included a new camshaft with duration increased from 288/302 (No. The 421 SD produced up . and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). Engine Oil: 95 ft-lbs. 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. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). 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. . It also sports the four-speed manual, limited . The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . The 421 engine is available only with related heavy-duty driveline components. Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. The GTO's new hood scoop design, with the inlets centrally located and mounted above the carburetor, provided the opportunity for experimentation.