Given how late in the model year it was, Pontiac decided not to incur the costs of recertifying the SD-455 for other models other than the Firebird. 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 . For 1967 only Pontiac called this engine the Quadra-Power 428. The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. Optional power was the 421/356 with Tri-Power or the 421 HO putting out 376 horses with Tri-Power. 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. Valves: Competition Products stainless steel, 1.92 /1.66-in The camshaft was also revised to have a slightly higher duration, the carburettor jets tuned and a dual exhaust was implemented allowing the power to increase to 220hp (223PS; 164kW) at 4000 rpm and 320lbft (434Nm) of torque at 2800 rpm. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). - P.Top - Correct Exterior/Interior. Initially marketed as a 287cuin (4.7L), it went on to be manufactured in displacements between 265cuin (4.3L) and 455cuin (7.5L) in carburated, fuel injected, and turbocharged versions. Upon reflection, many did not consider that it was the only large displacement engine still on offer for any performance car on the market, and reconsidered Pontiac's position between the rising CAFE emissions restrictions.[14]. The Fresh Air package continued into the 1966 model year. Tri Power engine however was optional. Fuel pump: Will use 110-gph Carter Preparation: Install in rod, torque, measure ID Muscle Cars. Reductions in reciprocating weight free up 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. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. For those who may not be familiar with the equation, here it is again: 3.75. and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). 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. Most Pontiac engines were painted light blue. It was rated 180hp (134kW) @ 4600rpm and 264lbft (358Nm) @ 2400rpm with a two-barrel carburetor, 200hp (149kW) @ 4600rpm and 278lbft (377Nm) @ 2800rpm with the four-barrel carburetor. 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. Along with proper parts selection, accurate machining and assembly are also important. Rocker arms: Crower roller, 1.6:1 The shaker wore the decals "455 H.O." 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]. 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. Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981. 1966 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA : 389: 8.6:1: 256: Manual: 91: 254: 2 bbl: WB . In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers. On this Wikipedia the language links are at the top of the page across from the article title. Installed position: 110-deg Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. . The 421 SD Tri . 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]. Today, they have an average value of $430,000 in #3 (Good) condition, while the best in the world is worth about $550,000. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . [citation needed]. Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. 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. The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. 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. 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 SD-389 was limited to a single 4-barrel while the SD-421 used dual 4-barrels. Valve seals: U.S. Seal Diameter: 516-in Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. Casting number: 97770716, '64 date 1969 - 400 Ram Air III Code 62. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . Pontiac introduced the OHC 6 in two flavors for '66: a base engine with a one-barrel carburetor that developed 165 hp at 4700 rpm, and a sportier version with a 10.5:1 compression ratio, a high-lift cam, a split exhaust manifold, and GM's new four-barrel Quadrajet carburetor (below). 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. 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. Centerline: 110-deg The 338-bhp four-barrel was the base engine. Power output ranged from 135hp (101kW) to 170hp (127kW). The W72 301 was a tuned L37 301 Pontiac V8 with some minor upgrades. Retainers: Crower steel 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 2+2 option package arrived for 1965, giving the Catalina a performance persona and credentials to match. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. Special Offer on Antivirus Software From HowStuffWorks and TotalAV Security. 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . Model Number: Body/Style Number: Body Type & Seating: Factory Price: . The Armasteel cast crankshaft was the standard hardened cast-iron crankshaft used throughout the entire Pontiac V-8 line until 1967. 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. Headers: Hooker Super Comp (for dyno test) Carb: (3) Rochester two-barrels PMD Preparation: Wash after balance for assembly Price $30000.00. Secondary: Front and rear #70 Year. By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. 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 goal of making a Pontiac Hemi succeeded but the engine was never produced. A panel covers the dash opening where the radio would have been on a standard Catalina. "1966 Pontiac 2+2" Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. 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). 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. There was also the addition of dual exhaust, and for vehicles equipped with a manual transmission, a slightly more aggressive camshaft. In addition, a shallower spherical-wedge combustion chamber moved the tuliped valve heads .040" closer to the piston at TDC, improving mixture draw considerably during the intake stroke. 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. 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. From a performance perspective, the 2+2 is pretty impressive. To learn everything you need to know about car engines, see. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. It was clear to most enthusiasts by 1966 that midsize models had seized the muscle car mantle. Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Timing chain: LPC, double rollerINDUCTION I don't know if it can be done, but I'm going to try." Pontiac did not release official power ratings for this engine, saying only that it had more than 300hp (224kW). By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. The main upgrade for the engine was the ESC, (Electronic Spark Control)[15] which provided slightly more power at 170hp (127kW) with 4.9L (299cuin) for the 19801981 model years. The valve angle was reduced from 17 degrees to 14 degrees for better breathing. Are you thinking of buying a 2007 muscle car, or any other car? Update your shipping location. 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 . It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. Compression Ratio: 10.6:1 effective Math, not gasoline, makes horsepower under the hood of a Pontiac. All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. Instead, they were substituted with the L80 Oldsmobile 403, or the L37 Pontiac 301 if they still requested a 4-speed transmission. Sponsored Stories . Pontiac V8 Engine Codes and Specifications. Transistorized ignition was available. Royal Pontiac developed the prototype of the package on their 1965 GTO drag car and Pontiac picked up the idea and in August 1965 Pontiac offered the new Fresh Air package to dealers consisting of the parts and instructions needed to make the hood scoop functional, including the metal tub to mount to the carburetors and rubber gasket to seal it to the underside of the hood. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . Likewise, the top 428 carried the same 376-hp rating as the 1966 Pontiac 421 Tri-Power motor. 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. The camshaft was the HO cam with 288/301 duration. The 1980 301 Turbo was rated at 210hp (157kW) at 4400rpm and 345lbft (468Nm) @ 2800rpm. (imp.) Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. 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. The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. In 1970 the casting number #9799914 Ram Air 400 4-bolt main block also used the 4-bolt main caps on Ram Air applications. A three-speed stick was standard; a four-speed and automatic cost extra. 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. Melling PN M54D with 60 psi spring, made 70 psi at 6,000 rpm with 30W oil 1966 Pontiac Catalina Specifications and Production. [22]. Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. "Armasteel" was a trademark of pearlitic malleable iron developed by GM's Saginaw Metal Casting Operations around 1936, which was referred to as "locking ball" cast-iron, as opposed to the "flaking" type found in other engines. Maximum flow at 28 inches of water Year: CU IN: Casting # 1967: 326. We and our partners use cookies to Store and/or access information on a device. 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. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. Tri-power engine rated at 376 hp. Since the story of this 421 is better told in pictures, follow along as we take you on this exciting journey! Intake: 218 cfm at 0.500-in With the 1964-1967 Pontiac Catalina 2+2, Pontiac achieved a combination of power, road-holding, and fine styling superior to any other big Pontiac, and most of the competition's models besides. Total Timing: 36-deg BTDC The first letter equals the month. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. Pontiac differed from other GM Divisions and most other manufacturers in producing only a single small block V8, rather than adding a larger big block to its line-up. The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. The head design was incorporated from the earlier 1970's 350 Pontiac heads, and could satisfy emissions in all states except for high-altitude emissions states and California. 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. Two tri-power 421s were optional, one with 356 bhp, the other with 376. For the 1969 and 1970 model years it was the standard engine in both the Firebird Trans Am and the GTO Judge. These same heads were also used on the 1964 GTO 389 tri-power engines. 1968 - 400 Ram Air II Round Port Code 96. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. They acquired the featured Montero Red 1966 Pontiac Catalina post car, which was equipped from the factory with the 421 H.O. 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. Bearings: Sealed-Power mains and rods, cam Dura-Bond 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. The 389 was the standard engine on the GTO up to 1966. The 421SD was available in 1961 as a dealer option or over the counter then in 62 and 63 from the factory, and was fitted with a list of internal modifications designed solely to withstand the abuse of drag racing. Oil pan: 8-quart with extended pick-up, fabricated retention clamp . In 1968, there was also a 350 "HO" which had increased power with the addition of higher compression #18 heads (#17 and #46 were the most common 2-barrel heads), a four-barrel carburettor and matching intake that was also used on the 400 and 428 engines. 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 was rated at 250hp (186kW) with 8.6:1 compression and 260hp (194kW) at 10.25:1 compression. Forged rods and forged-aluminum pistons were specified, as were unique high-flow cylinder-heads. 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). Ellingson Motorcars (877) 638-7170. Once corrected the SD-455 was recertified and was released for production in late April 1973. As a result, it was remarkably free of teething problems. Deck Height: 10.215-in Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the 455 engine, it was re-introduced mid-year as an available option for the 1975 Pontiac Trans Am. Beginning in 1967 casting nnumbers moved to the rear of the block just behind cylinder #8 . A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). The 2+2 package was first offered as a $291 option on Catalina hardtops and convertibles in 1964. It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. The crankshafts were also unique in the fact that they featured only two counter weights instead of the usual five and also featured lightened connecting rod journals. 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? High output Pontiac V8 Cylinder Heads. HP = flow at 28 in/H2O x 0.257 x # of cylinders. With an identical bore and stroke of 4+116in (103.2mm) and 3+34in (95.3mm) it was precisely half the displacement of the 389 and shared numerous parts with the V8,[1] yet weighed considerably more than half as the engine lower half and block casting were not simply divided down the middle.

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