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. Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. RamAir 4 Motor Price $15500.00. Bearings: Sealed-Power mains and rods, cam Dura-Bond 1966: 421: 9782611 (late) 1967-1969. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. Two four-barrel carburetors, 10.5:1 compression, 285hp (213kW) @ 5100rpm, 330lbft (447Nm) @ 2600rpm. Free local pickup. The engines feature a cast-iron block and head and two valves per cylinder. 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. moniker from the shaker due to the disappointing public approval as the motor was not deemed to be "High Output". When Robert Critchfield took over as general manager in 1952, he launched an ambitious plan to move Pontiac into the upscale, mid-range market occupied by Oldsmobile, and that demanded V8 power. Along with proper parts selection, accurate machining and assembly are also important. 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 requires a compression ratio of at least 10.25:1. Are you thinking of buying a 2007 muscle car, or any other car? Factory heavy-duty high-pressure oil pump and eight-quart sump, four-bolt main bearing caps with Moraine aluminum bearings, and #1110976 dual-point distributor without vacuum advance. Timing chain: LPC, double rollerINDUCTION Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. 1966 Pontiac Catalina Specifications and Production. 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). 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. [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. From 1977 to 1981 there were 4 distinct 301 versions: For 1981 model year vehicles, the engine codes are the 8th digit of the VIN. The 421 SD Tri . The 1971 Pontiac 455 HO was Pontiac's first engine to receive a special 800cuft/min (23m3/min) Rochester Quadra-jet carburetor with specific jetting. Head bolts do not pull on the cylinder wall causing distortion. In light of this, the 'Year' entry, as indicated by the chart below, may actually represent the year that the heads were cast, versus the year that they were actually installed on an automobile. A camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV-spec camshaft that had originally been planned for the engine (initially rated at 310hp (231kW) with that cam), but ultimately proved incapable of meeting the tightening emissions standards of the era with sufficient margin to satisfy Pontiac emission engineers given expected volume production variations. 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. 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). Specifications listing with the performance factory . gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). The manuals had Hurst shifters. Pontiac V8 Engine Tune-Up and Torque Specifications. $6.49 shipping. One of the key modifications over the standard 301 4-barrel was the 301 Turbo block. For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). 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. There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. This new material had stronger alloys in the iron. 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]. Despite their work, the division's conservative management saw no immediate need to replace the Pontiac Straight-8 until later in the 1950s. Still, it was the strongest American engine offered that year. While all this sounds great, remember the engine will have to retain the small 1.92-inch intake valve because chamber space is too tight for larger ones. The Fresh Air package continued into the 1966 model year. The 421 also marked the end of the option for a forged-steel crankshaft. Like previous generations of Ram Airs, it used Pontiac's special cast-iron "headers". aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. Neither casting was equipped with an exhaust crossover. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. [20] Pontiac asked Mopar (Chrysler, Dodge, Plymouth) for help in designing it and making it work. All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. 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. 5 January 2007. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . 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. Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. Fuel pump: Will use 110-gph Carter Block casting # 9773157. Brand: Crower PN 60311, solid Most Pontiac engines were painted light blue. 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. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Headers: Hooker Super Comp (for dyno test) 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. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. A set of Hooker Super Comp headers will be used on the dyno, and Jim is porting the stock heads to increase intake-port flow by 30 cfm. HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. 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. It was called the Ram Air IV due to the planned use of four air inlets. Pontiac produced the 421 V8 engine from 1961 to 1968. 301 Turbo (210hp, 157kW), (with the 5th VIN character being a "T". 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. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. An evolution of the RA IV and H.O. In 1963 Pontiac dropped the Buick division built 215 cu. Also bowing in 1967 was the new Firebird, which had the . 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. [citation needed]. The W72 also featured a camshaft with a higher duration, finer tuned 800cfm Rochester Quadrajet, insulated fuel line, larger 60PSI oil pump, chrome valve covers, a larger harmonic balancer, and the "T/A 6.6" Shaker decal. The base engine was the 421 four-barrel with 338 horsepower. Brand: Fel-Pro head and intake/ SCE pan and timing cover Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm More 400cuin (6.6L) engines were produced by Pontiac than the other versions - estimates range from 80 to 200 units. 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. Math, not gasoline, makes horsepower under the hood of a Pontiac. Preparation: Disassemble, check ball seat for width, spring tension, plate clearanceHEADS Lift: 0.515/0.525 with 1.6:1 rockers The code consists of 3 or 4 digits. They came up with a 269-cubic-inch (4.4L) L-head design. The last "true" Pontiac V8s, a 265 and 301cuin (4.3 and 4.9L), ended production in early 1981. (V8) - Stamped on right front side of block or beneath production . Price $14000.00. For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). Pontiac's initial plans were to use a camshaft with specs identical to the 041 Ram Air IV camshaft, but testing showed emissions, while technically compliant, did not have "cushion" to satisfy Pontiac's emissions engineers, to avoid production variation leading to any non-compliant engines being produced and sold.