All Rights Reserved. Retainers: Crower steel 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. Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. 1966: 421: 9782611 (late) 1967-1969. Pushrods: LPC chrome moly Price $30000.00. I don't know if it can be done, but I'm going to try." Only about 400 were produced before the fuel injection system was quietly dropped. Three two-barrel carburetors, 10.75:1 compression, 290hp (216kW) @ 5000rpm, 375lbft (508Nm) @ 2800rpm. Not where most enthusiasts go first. The Armasteel cast crankshaft was the standard hardened cast-iron crankshaft used throughout the entire Pontiac V-8 line until 1967. in. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 544127 with larger 2.02/1.76-inch (51/45mm) valves entered production. 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. The 389 would remain the standard Pontiac V8 engine through 1966, offered in a bewildering variety of outputs ranging from 215 to 368hp (160 to 274kW). 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. 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. 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]. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. Year: CU IN: Casting # 1967: 326. Primary tube length: approximately 31.00 inches Head bolts do not pull on the cylinder wall causing distortion. Valve seals: U.S. Seal Rated at 370 horsepower at 5,200 rpm and 460 pounds-feet of torque at 3,800 rpm, it has 10.75:1 compression, with induction through three Rochester two-barrel carbs, Pontiac's well-known "Tri-Power" setup. 1966 Pontiac 2+2 $64,995. In 1961 and 1962 they were available with either one 4 barrel carburetor or a dual 4 barrel carburetor setup depending on whether the buyer wanted to head to the racetrack or drag strip. All GTOs built from 1964-66 were powered by a 389-cubic-inch V-8 with 10.75:1 compression. 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.. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. Distributor: '61 Delco cast-iron with direct oiling 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. 287. An evolution of the RA IV and H.O. Preparation: Install in rod, torque, measure ID With higher compression and dual exhaust it produced 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 through 1967, its final year. Block description: '64 421ci #157 Hewing to GM's standing edict limiting engine size to 400 cu in for its midsize and smaller cars, the 360hp (268kW) (underrated),[citation needed] the 400 cubic inch Ram Air V-8 was the most powerful and advanced option available in the 1967 GTO and Firebird. cam specs out at 215/225-degrees duration at 0.050 and has just 0.407/0.407 lift with the factory 1.50:1 rockers. street engine. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. Crank: Original '64 421 The Ram Air IV heads had 1/8" taller intake ports, larger intake port volume with more airflow, yet shared the Ram Air II round exhaust ports. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. Dual Carter Carburetor 500cuft/min (14m3/min) #3433S (front) and #3435S (rear) carburetors with manual chokes and mechanical linkage. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? 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. It was removed from the design for the 1960 model year because designers moved the generator and the power steering pump from atop the front of the engine down to the front of the heads to accommodate a lower hoodline. There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. / 8.3 mpg (U.S.) / 3.5 km/l, more data: 1966 Pontiac Bonneville Convertible . 1963 - 389 SD Code 543797. Contemporary road tests suggest that it was actually somewhat inferior to the Tri-Power engines, although it did have better fuel economy. For those who may not be familiar with the equation, here it is again: An example of data being processed may be a unique identifier stored in a cookie. Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". Wires: NAPA Belden 7 mm Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. This installment includes the assembly and parts selection up to the long-block. The engine compartment of this concours Catalina is beautifully finished. Simply put, what good is the power if the engine does not last? Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. The 1969 HO 350 HO was equipped with the 400cuin (6.6L)'s large valve heads (# 48's) and the 400 HO camshaft and rated at 330hp (246kW). 1967 - 400 Ram Air or 428 Code 670. 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. A panel covers the dash opening where the radio would have been on a standard Catalina. Engine Block Date Code. This was to ensure there was enough fuel to cool the cast offset dished pistons. [7] Though listed as slightly less powerful than some high-performance iterations of the 400 (such as the 366hp (273kW) Ram-Air), the 455 had 500lbft (678Nm) of torque, 55 more lbft (75Nm). In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. Carb: (3) Rochester two-barrels PMD The tri-power equipped XS-code 389 was shipped with the Ram Air pan in the trunk, and the dealer had to fit it and cut out the underside of the hood scoop to make it functional. Pre-Owned. The W72 offered many improvements over the standard L78 400 Pontiac. 18 watchers Head mods: Port, cook, magnaflux, glass bead, convert to screw-in studs The Pontiac 2+2 is a full size automobile that was manufactured by Pontiac, built on the B-body chassis.It debuted for the 1964 model year as a trim-only option for the Pontiac Catalina, with special door panels, bucket seats with a center console, and exterior badging.Pontiac marketed the 2+2 as the "big brother" to the popular Pontiac GTO.. Beginning in 1965 the name Catalina was no longer . It included a new camshaft with duration increased from 288/302 (No. The Ram Air II also incorporated the first computer-designed camshaft. The engine build will be discussed in two parts. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. 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). As a result, it was remarkably free of teething problems. Collector size: 3.00-inGASKETS 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. Free local pickup. This had extra-rich "DX" secondary metering rods and a remote vacuum source for the primary metering rod enrichment circuit to allow the Power Enrichment Vacuum Regulator (PEVR) to release the primary metering rods to move to the up position (enrichment) anytime during boosted conditions. Pontiac offered Tri-Power on select models and engines (347, 370, 389, and 421 CID) from 1957 through 1966, when it was finally . "1966 Pontiac 2+2" By 1949 work on a 287cuin (4.7L) OHV V8 had begun, but moved along slowly. The SD-455 used round-port cylinder heads similar to those used on the 1971 and 1972 455 HO, with specific "LS-2" intake and cast-iron exhaust header manifolds. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. 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]. Note the tri-color Pontiac Ventura upholstery. The consent submitted will only be used for data processing originating from this website. Casting number: 97770716, '64 date 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. 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 . Preparation: File-fit for end gap if needed, wash 1963 Pontiac V8 Engine Specs. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. 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. Cam was a #541596 McKellar No. for 1980, and the 8th being a "T" for 1981). like the earlier 1971-1972 motor, but it was not the same motor, and featured standard d-port heads with a very conservative camshaft. Timing chain: LPC, double rollerINDUCTION The rod weighs 751 grams versus the stock rod at 958 grams. 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. Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. 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." Mechanical advance: 36-deg at 3,200 rpm It was renamed 428 HO for 1968. 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. Rod/Stroke ratio: 1.65:1BOTTOM END This was the only Poncho with standard 421-cid power. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. One of the key upgrades were the 6x4 heads. In 1967, the Pontiac 2+2 became an option on the . Piston-to-deck height: 0.009-in Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. Are you thinking of buying a 2007 muscle car, or any other car? 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. Maximum flow at 28 inches of water True Pontiac engines were designed and built in Detroitnot on a computer, but often by GI-bill-educated engineers who grew up working with their hands and now had a slide rule in their pocket instead of a greasy rag. . Pontiac engineers tested their 269cuin (4.4L) V8 in 1949 or 1950 against an OHV Oldsmobile Rocket V8 303cuin (5.0L) downsized to 270cuin (4.4L). Valvesprings: Crower, dual no damper The first of the "big journal" Pontiac V8s, it had a bore and stroke of 4+332in 4in (104.0mm 101.6mm) and came with dual four-barrel carburetors. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. Though never factory-installed in any car, the ultimate engine of the Ram Air line of engines was the tunnel-port Ram Air V. In 1969 Pontiac created four versions of the Ram Air V engine: a 303cuin (5.0L) short deck version for SCCA Trans-Am racing, a 366cuin (6.0L) variant for NASCAR, a 400cuin (6.6L) version for street use in GTOs and Firebirds, as well as a 428cuin (7.0L) adaptation for drag racing. The main innovation of the Pontiac engine was reverse-flow cooling and the stamped rocker-arm system, which had been devised by Pontiac engineer Clayton Leach in 1948. The compression ratio will be 10.6:1. 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. Pontiac offered this to the public as a streetable version of the 421 SD. The 421.19cuin (6.9L) was introduced in 1961 as a dealer-installed Super Duty option. Ever wonder what it would take to increase that number by 100? HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. Seat pressure: 110 pounds at 1.600-in The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore Math, not gasoline, makes horsepower under the hood of a Pontiac. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. The 1971 455 HO was rated at 335hp (250kW) @ 4,800rpm and 480lbft (651Nm) of torque @ 3,200rpm (gross). This was underrated at 330hp (246kW). The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. 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. and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). It was offered in the following forms: For 1957 the V8's stroke was increased to 3.5625in (90.49mm), for a displacement of 347cuin (5.7L). Fuel line size: 38-inch, 516-inch to carburetor VEHICLE TYPE . It had a four-barrel carburetor, dual exhaust, and higher compression, and was good for 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 - 1966 and the final year, 1967. The premier SD 421 cylinder head was the late 1962-early 1963 casting #9771980 aka "980", featuring a larger 11.3cuin (185cc) intake port volume, flowing 230cuft/min (6.5m3/min) @ 28in (710mm). This same camshaft was also used in Pontiac's 19691970 RA IV production cars. The first letter equals the month. aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. 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. 1975 Factory Service Manual lists the SD-455, but the SD-455 did not meet emissions for the 1975 model year and was canceled. [citation needed]. The cylinder heads on the 400 CID version had an intake port volume of 290cc (17.70cuin), nearly twice the size of a typical standard D-port Pontiac head - and flowed in the area of 315cuft/min (8.9m3/min) @ 0.8in (20mm) valve lift; in the realm of the NASCAR-dominating Chrysler 426 Hemi. 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. It featured 3+14in (82.6mm) main journals (which the legendary Smokey Yunick reputedly left Pontiac's engineering department over). [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. 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. The 389 was the standard engine on the GTO up to 1966. The 1972 455 HO was rated at 300hp (224kW) @ 4,000rpm and 415lbft (563Nm) @ 3,200rpm. Type Size Carb Horse Power Tourqe; Tri-Power: 389ci: 3x2bbl: 360 hp @ 5200 rpm: 424 lb-ft @ 3600 rpm: Base 8 . Returns; . The 4-barrel version was available from 1978 to 1981 and the Turbo version was limited to the 1980 and 1981 model year, however, it was originally intended to be available for the 3rd generation Firebird before its cancellation by GM. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. Setting initial timing at idle with the vacuum advance disconnected will usually fall around 12 to 16 degrees, but that's not really important. Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . This was a project started with the end goal of building a 427 Hemi. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. 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. For 1967 only Pontiac called this engine the Quadra-Power 428. The shaker wore the decals "455 H.O." Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. 1966 yk 421 376 a 3x2 1967 zg 230 165 a 1 1967 zm 230 165 a 1 1967 zk 230 165 3 m 1 1967 zs 230 165 3 m 1 . Optional power was the 421/356 with Tri-Power or the 421 HO putting out 376 horses with Tri-Power. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. The heart of the build, a code 45B 1964 421 HO 370 HP manual trans 4-bolt main block, all Pontiac 421 engines without exception had 4-bolt main caps. Ellingson Motorcars (877) 638-7170. It also sports the four-speed manual, limited . 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. Here is another number to ponder: 370 hp. 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. Engine displacement is a function of bore and stroke. It was rated at 366bhp (273kW) (gross) in the GTO version. The code consists of 3 or 4 digits. Stock Pontiac Engine Specs. Next time we will cover the induction system and the dyno testing to see if Jim meets his goal. Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). Manage Settings The engine was available in all full-size Pontiacs. 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. Along with proper parts selection, accurate machining and assembly are also important The four-barrel 400 was a popular performance option for many of Pontiac's cars. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. Tri-power engine rated at 376 hp. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. The GTO came with a four-barrel 389 V8 with 335 horsepower. 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. Pontiac Engine Torque Specifications. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. A three-speed stick was standard; a four-speed and automatic cost extra. Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. A higher-output version was offered, called the 326 HO (High Output). A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. 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].
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