Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. Carb: (3) Rochester two-barrels PMD In 1969, Pontiac also used a revised crankshaft out of a Pearlitic malleable-iron, although it still used the "N" casting letter. Read. 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. Low-performance and two-barrel applications, the standard engine in full-sized Pontiacs, got 1.96in (49.8mm) intake and 1.66in (42.2mm) exhaust valves and pressed in rocker arm studs. Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm 1968 Pontiac GTO 428 / Royal Bobcat. 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. 1962 421 super duty motor Price $30000.00. Casting number: 97770716, '64 date 1965 Pontiac LeMans GTO Mecum. Lifters: Crower solid with EDM oil hole (0.024 inch) 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. Though a change of camshaft would delay production, Pontiac decided to change camshaft, employing one with identical timing to the 744 camshaft, which had been used in the 400 Ram Air(aka Ram Air III) engine with manual transmissions. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". The valve angle was reduced from 17 degrees to 14 degrees for better breathing. Two tri-power 421s were optional, one with 356 bhp, the other with 376. 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). 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. The two inline engines were used through 1954, when Pontiac unveiled its OHV Strato Streak V8 in 1955. Not where most enthusiasts go first. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. A higher-output version was offered, called the 326 HO (High Output). Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . Beep, beep! 3.75. The block is still at standard 421 bore size (4.09375") and will be bored to fit standard size forged 428 pistons (4.120"). The last was the 421 HO and included a high-output camshaft and valve train. Buckets and a console were added to the top-line Catalina interior, which could be optioned with a sport steering wheel and instrumentation that included a tachometer and oil-pressure gauge. [19] The cylinder head design is similar to the Ford FE tunnel-port head used in the GT40 and Can-Am series racing. 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. Length: 8.750-inCAM The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. 400 Ram Air (1969) / Ram Air (1970), aka Ram Air III, Learn how and when to remove these template messages, Learn how and when to remove this template message, "Tested: 1968 Pontiac GTO 428 / Royal Bobcat", "1969 Pontiac Grand Prix 428 specifications | technical data | performance | fuel economy | emissions | dimensions | horsepower | torque | weight", "Muscle Car Horsepower How Exaggerated Was It? The rod weighs 751 grams versus the stock rod at 958 grams. Other dimensional factors such as the wheel base, curb weight and length were largely unchanged. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. 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 V8 Engine Tune Up Specifications. 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. Valves: Competition Products stainless steel, 1.92 /1.66-in 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]. 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]. This resulted in a lightweight design weighing less than the Chevrolet small-block V-8. 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 engines feature a cast-iron block and head and two valves per cylinder. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. Mechanical advance: 36-deg at 3,200 rpm Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. [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. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. Rods: Howard's billet 4340 certified steel, stock 6.625-in, floating pins Distributor: '61 Delco cast-iron with direct oiling It shared the 4.121in (104.7mm) bore of the 400, but with a 2.84in (72.1mm) stroke for a displacement of 303cuin (5.0L). in. Ellingson Motorcars (877) 638-7170. 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 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". Neither casting was equipped with an exhaust crossover. Here is another number to ponder: 370 hp. Type Size Carb Horse Power Tourqe; Tri-Power: 389ci: 3x2bbl: 360 hp @ 5200 rpm: 424 lb-ft @ 3600 rpm: Base 8 . The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. Pontiac produced the 421 V8 engine from 1961 to 1968. Setting initial timing at idle with the vacuum advance disconnected will usually fall around 12 to 16 degrees, but that's not really important. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. To determine horsepower from airflow, invert the equation: CO2, . The 389 was the standard engine for the Pontiac Grand Prix and Pontiac Bonneville and installed in the Pontiac GTO through 1966. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. 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. Math, not gasoline, makes horsepower under the hood of a Pontiac. Open pressure: 282 pounds at 1.100-in 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. 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. 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]. Its cast "670" heads had taller valve spring heights than the standard D-port heads, and the only 14-degree valve angle closed combustion chamber making these heads unique. 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. ", 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. However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. . Melling PN M54D with 60 psi spring, made 70 psi at 6,000 rpm with 30W oil ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS This was a completely stock car on loan from a private owner for the test. Lobe separation angle: 112-deg 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. The 428 was increased to 456.12cuin (7,474cc) in 1970. It included a new camshaft with duration increased from 288/302 (No. After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). 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). 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. Pontiac did not release official power ratings for this engine, saying only that it had more than 300hp (224kW). The compression ratio will be 10.6:1. Save pontiac 421 complete engine to get e-mail alerts and updates on your eBay Feed. Engine Oil: 120 ft-lbs. The 1966 Pontiac Ventura doesn't necessarily come up when speaking of 60's muscle cars, but the type of V-8's offered with the Ventura meant plenty of power. Prices ranged from $2,760 to $3,220 . All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . He says the Tri-Power setup modified with the addition of the larger '66 center carb will flow 1,050 cfm.
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