To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Engine Oil: 120 ft-lbs. The goal of making a Pontiac Hemi succeeded but the engine was never produced. 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. To learn about it, read. Compression Ratio: 10.6:1 effective Sponsored Stories . All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . The 455 HO designation made its debut in 1970; Rated at 360 or 370hp (268 or 276kW) (depending on which vehicle it was installed into) & 500lbft (678Nm) of torque, it differed from the regular full sized car 455 by large valve heads with smaller combustion chambers, and a larger camshaft. 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 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. 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. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. Pontiac had prepared for the forthcoming cancellation of the venerable 400 by producing large volumes of the stronger cast "XX" 400 blocks in 1977 that were assembled in 1978, and stockpiled at a warehouse by the assembly plant for later use. It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. Along with proper parts selection, accurate machining and assembly are also important. 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." . 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. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. 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. Distributor: '61 Delco cast-iron with direct oiling 1962 - 389 SD Code 544127. Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. Ellingson Motorcars (877) 638-7170. 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. The four-barrel version, set up for sustained high speeds, had 390 hp. 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. 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. Diameter: 516-in - P.Top - Correct Exterior/Interior. With A/C On, Engine Hot: 421: 1966: With Tri-Carb, With Air Injection reactor: 45S: 0.035: After outselling Oakland, Pontiac became the sole survivor of the two by 1932. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. Total Timing: 36-deg BTDC Year. Note the tri-color Pontiac Ventura upholstery. The shaker wore the decals "455 H.O." Muscle Cars. Pontiac RAIII/IV Engine parts collection Price $14000.00. Regarding Crower's upgrade suggestions for its . 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. It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. RamAir 4 Motor Price $15500.00. Displacement began at 287-cubic-inch (4.7L) and grew as large as 455-cubic-inch (7.5L) by 1970. The Ram Air IV replaced the Ram Air II in 1969. He thinks the stock exhaust flow of 180 cfm will suffice for this build. 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. It used the "744" camshaft (301-313) in the earlier manual trans versions, later downgraded to the "068" version, and the 288/302 duration cam with automatic transmission. 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.Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. 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). Year: CU IN: Casting # 1967: 326. Lobe separation angle: 112-deg 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. In 1973 a further refined and even stronger but less powerful version, the Super Duty (SD) engine, was planned for Firebird, Grand Am, Le Mans (GTO), and Grand Prix models. Engine Oil: 95 ft-lbs. 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. 1975 Factory Service Manual lists the SD-455, but the SD-455 did not meet emissions for the 1975 model year and was canceled. The V8 engine was introduced for the 1955 model year as the "Strato Streak". Returns; . The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. To learn everything you need to know about car engines, see. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. Cam was a #541596 McKellar No. 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. 1966 Pontiac 2+2 $64,995. Pontiac V8 Engine Tune Up Specifications. The XS-code 389 was still rated at 360bhp at 5,200 rpm, same as the more common WS-coded Tri-Power 389, but performance was noticeably improved on acceleration runs. These same heads were also used on the 1964 GTO 389 tri-power engines. Unlike previous enlargements of Pontiac V8s, it did not replace the 389. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. Initial advance: 18-deg The W72 offered many improvements over the standard L78 400 Pontiac. in., again available only in the GTO and Firebird. Price $30000.00. or Best Offer. Angles used in valve job: 30-deg intake, 45-deg exhaust seat, width 0.040-in intake, 0.060-in exhaust The 421 engine is available only with related heavy-duty driveline components. 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. Thus, the quest to find 100 hp in a 421 started on the flow bench, before a wrench or machine tool touched any part of the 49-year-old engine. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. 1966: 421: 9782611 (late) 1967-1969. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. Modified versions of this engine were extensively used in NASCAR stock car racing and drag racing competition. Get the best deals on Engines & Engine Parts for 1966 Pontiac GTO when you shop the largest online selection at eBay.com. 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]. It included a new camshaft with duration increased from 288/302 (No. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. Most likely prompted by its development of the Pontiac OHC six, the GM division built three different experimental SOHC 421 CID V8 engines in the early 1960s. This 1966 Pontiac 2+2 Convertible is a beautifully restored big-block convertible that is ready for some boulevard cruising! They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. As a result, it was remarkably free of teething problems. Engine displacement is a function of bore and stroke. 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). Primary tube length: approximately 31.00 inches 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. 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. In 1967, the cylinder head design was improved for the 400 4-barrel engine. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. 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. Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 It was renamed 428 HO for 1968. 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).