The initial press cars that were given to the various enthusiast magazines (e.g. Oil pan: 8-quart with extended pick-up, fabricated retention clamp superior_queens (3,035) 100%. The 2-barrel version was last offered in 1979. 1966 Pontiac Catalina technical specifications and data. 301 4-barrel 'W72' or 'ESC' (170hp, 127kW) (with the 5th character of the VIN being a "W" for 1979-1980 and the 8th for 1981). Collector size: 3.00-inGASKETS . Manage Settings For the 1978 model year, Pontiac re-incorporated the earlier thicker cast cast engine block denoted by the cast number 418988 and a "XX" cast into the side of the block. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). 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]. Jim told HPP, "Since I was a young man in the '60s, I always thought how great it would be to find a true 100hp in a legendary 421 Tri-Power setup that retained its iron heads and intake. There were a few 1962 Grand Prix models that came with a 421 SD from the factory so if someone is lucky enough to have one today then they have a car that is probably worth some decent money simply because of the rarity of these models.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[580,400],'enginefacts_com-medrectangle-3','ezslot_2',115,'0','0'])};__ez_fad_position('div-gpt-ad-enginefacts_com-medrectangle-3-0'); Engine Facts 2023. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. 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. Year: CU IN: Casting # 1967: 326. 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. The 1970 '455 HO' was a conventional "D" port engine. Styling for Status. This is it! It was the same engine as the '67-'68 400 HO[18] but for 1969 and 1970 it included a driver-selectable outside air induction system on the GTO(it was a separate option on Firebird), with the hood vents opened and closed using a knob located under the dash, below and to the right of the steering wheel, its bracket labeled "RAM AIR". The overhead-cam six-cylinder engine was new for 1966 and the standard engine in the Tempest and Tempest Custom. 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. A larger 4in (101.6mm) ram air flex duct to the air cleaner from the left-hand fender, specific carburettor calibration for the Rochester Quadrajet, a "T/A 4.9" callout on the shaker, 60 psi oil pump, and cam similar in grind to the 220hp (164kW) 400 from the 19781979 model year were also included. Price $14000.00. . By comparison, the factory 421 H.O. 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. [22]. 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. (imp.) Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. View the Pontiac Engine Torque Specifications for engine repairs and rebuilds. . The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. To determine horsepower from airflow, invert the equation: The most valuable Pontiac GTO is the 1969 Judge convertible with the 370-hp Ram Air IV engine. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). Shipping to: 98837. Muscle cars wouldn't have much muscle without horsepower -- but what exactly is horsepower? aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. Method used to retain pins in pistons: . 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. High output Pontiac V8 Cylinder Heads. It was rated at 366bhp (273kW) (gross) in the GTO version. 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. It requires a compression ratio of at least 10.25:1. 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. Mods: Flow-test indicated '66 center carburetor would be required to improve total cfm, adapter made to fit '66 center carburetorIGNITION Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. The W72 offered many improvements over the standard L78 400 Pontiac. Rod/Stroke ratio: 1.65:1BOTTOM END These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number. 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). 1966 Pontiac Catalina Specifications and Production. The inlets were all well within the boundary layer that exists close to the surface, so all of these systems would more accurately be described as "outside air induction" systems, benefiting from the intake of cooler, and thus denser, outside air versus the comparatively hotter and less dense air under the car's hood. Like the 421, the 428 used a large-journal crankshaft, but externally it was the same size as all Pontiac V-8s of that era (the later 301 used a shorter deck height). NASCAR race cars embody the muscle car philosophy of power. Length: 8.750-inCAM Engine, horsepower, torque, dimensions and mechanical details for the 1966 Pontiac Catalina. The 389 was the standard engine on the GTO up to 1966. HP = flow at 28 in/H2O x 0.257 x # of cylinders. Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. [4] It was replaced by the 455 for the 1970 model year. Returns; . Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. The Pontiac 2+2 featured a 6.9 L V8 engine, heavy-duty front springs, dual exhaust and distinctive exterior body design. The company says engines running this cam benefit from headers, cylinder-head port work, a large-cfm carb, and an ignition upgrade. Unfortunately, that's what happened with the 1963 Pontiac Super Duty 421. The 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. All Rights Reserved. Simply put, what good is the power if the engine does not last? The 2+2 option package arrived for 1965, giving the Catalina a performance persona and credentials to match. If you've been thinking about cruising the local boulevard in a classy convertible, but find yourself longing for the power under the hood that only a muscle car provides, perhaps it's time to take another long look at Pontiac's restyled 1965 Bonneville convertible. The base engine was the 421 four-barrel with 338 horsepower. The 1971 455 HO was rated at 335hp (250kW) @ 4,800rpm and 480lbft (651Nm) of torque @ 3,200rpm (gross). Pistons: Icon PN IC892 application 428 +0.030-in with 10cc dish gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . Royal Pontiac's engine swap wasn't a new trick for Pontiac. By 1963 Pontiac decided it was time to 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. 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. SB International 00958 1963-1966 Pontiac 389 421 Engine 1.920" Intake Valves (Fits: 1966 Pontiac GTO) $7.98. 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. 10 with 308/320 degrees of duration and 0.445/0.447-inch lift (11.3/11.4mm) with 1.65:1-ratio rocker arms and solid lifters, special #529238 forged-steel connecting rods, forged aluminum 4.09-inch (104mm) bore Mickey Thompson pistons, #542990 forged-steel crankshaft with a 4-inch (101.6mm) stroke and 3+14-inch (82.6mm) diameter main journals. Mechanical advance: 36-deg at 3,200 rpm 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). 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. The four-barrel version, set up for sustained high speeds, had 390 hp. Here is another number to ponder: 370 hp. Timing chain: LPC, double rollerINDUCTION 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). 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." It used a declutching fan, special exhaust manifolds, and chrome low-restriction air cleaners; rocker covers and oil-filler cap also were chrome. 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. Fuel line size: 38-inch, 516-inch to carburetor An evolution of the RA IV and H.O. Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. 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. [citation needed]. All 1980 Trans Ams received this engine as standard with the option to delete this engine choice as a credit option for the standard L37 301. Along with being cheaper to build, this allowed more consistent valve action with less weight than a conventional shaft. 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. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. Forged steel 6.625in (168.3mm) rods (Ram Air V style), Large-valve heads (valve diameter): 2.4in (61mm) intake, 2in (51mm) exhaust, Small-valve high-RPM head (valve diameter) 2.19in (56mm) intake, 2in (51mm) exhaust. Engine displacement is a function of bore and stroke. The 428 was factory installed in large cars only. Unlike previous enlargements of Pontiac V8s, it did not replace the 389. An example of data being processed may be a unique identifier stored in a cookie. Valve seals: U.S. Seal 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 horsepower ratings of this era were often dubious, with engines rated higher or lower in output for advertising, political, or insurance purposes. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. 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. The single four barrel was rated at 333 bhp while the Tri-Power version carried a 348 bhp rating. It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. Once corrected the SD-455 was recertified and was released for production in late April 1973. 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 four-barrel 400 was a popular performance option for many of Pontiac's cars. Greater throughput mixed with the proper amount of fuel and ignited at the ideal time for the flame to expand against the piston will result in more power. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. Various Pontiac sources have emphatically stated that NO 310hp (231kW) versions of the SD-455 were installed in regular production cars. Displacement (CID) Bore (Inches) Stroke (Inches) Mains (Inches) 1955. The 455 was used through 1976 when it, as with many other large displacement engines, was discontinued as manufacturers moved to smaller, more efficient models, even in their full size car lines. of torque at 3,600 RPM in the Firebird, with only a small throttle restrictor tab on the Firebird being different. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. This is the original car featured in the May 1962 issue of Motor Trend Magazine that was modified by Royal Pontiac and driven by Jim Wangers. Headers: Hooker Super Comp (for dyno test) Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. 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 1972 455 HO was rated at 300hp (224kW) @ 4,000rpm and 415lbft (563Nm) @ 3,200rpm. The 421 SD Tri . Rings: LPC (Liberty Performance Components) premium moly, standard tension CO2, . Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). and so the 326 bore size was reduced to 3.72in (94.5mm), giving a true 326.06cuin (5.3L). Pontiac engines were used in its U.S.-market cars; Canadian-built Pontiac automobiles generally used Chevrolet engines. The SD-455 motor was listed as an option in dealer brochures for the 1973 Grand Am and LeMans GTO(and planned for the Grand Prix as well) although none were produced for sale. All Pontiac V8s from 1955 to 1959 were reverse cooled, known as the "gusher" cooling system. One version of the engine featured camshafts driven off the front of the engine, another design had the cams driven by gears off the back of the engine. 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. 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. Preparation: Install in rod, torque, measure ID Carb: (3) Rochester two-barrels PMD I don't know if it can be done, but I'm going to try." . It was called the Ram Air IV due to the planned use of four air inlets. 093: 66 389 GTO: 65 . 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. Pontiac ignited the classic muscle car era with a stroke of marketing genius. 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." 421 CID V8 - 4BBL - Automatic - P.S. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. 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 400 2-barrel kept the 17 degree valve angles for '67; starting in '68 all Pontiac V8s went to the 14 degree valve angle. For those who may not be familiar with the equation, here it is again: Block/Crank combo: '64 four-bolt 421 / '64 OE 4.00-in stroke The 1972 455 HO was available in the Firebird (optional in Formula; standard in Trans Am) and 2-door LeMans (including those with the GTO option) and LeMans Sport convertible. Optional was the obligatory four-speed manual or new-for-1965 Turbo-Hyramatic three-speed automatic. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . In 1967, the Pontiac 2+2 became an option on the . For 1956 the V8 was bored out to 3.9375in (100.01mm), increasing displacement to 316.6cuin (5.2L). Regarding Crower's upgrade suggestions for its . Dry weight ranged from 590 to 650 pounds (270 to 290kg), depending on displacement and year. 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. The 1955-up Pontiac V8 that finally reached the public was an overhead valve engine with cast iron cylinder heads and block and wedge-shaped combustion chambers. HPP decided to follow this exciting exercise; we show you the highlights in this two-part primer. The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Pontiac offered this to the public as a streetable version of the 421 SD. The heads were a new design featuring siamesed intake ports. Other dimensional factors such as the wheel base, curb weight and length were largely unchanged. . The external dimensions of all their V8s, from 326455cuin (5.37.5L) were the same. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. In 1963 Pontiac dropped the Buick division built 215 cu. It could only be ordered with a TH200 automatic transmission and a 2bbl configuration. Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. 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. 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. After outselling Oakland, Pontiac became the sole survivor of the two by 1932. 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. 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. And it cruised silently and rode with less harshness than muscle intermediates. The rod weighs 751 grams versus the stock rod at 958 grams. 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. This was the beginning of factory supplied performance items such as 4 bolt main bearings and windage trays to reduce friction from crankcase oil. . Stating in 1962 the "421" and the "421 SD" engine became available as a factory option until 1966. Balancer: Original PMD rebuilt by Damper Doctor By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. Prices ranged from $2,760 to $3,220 . This new material had stronger alloys in the iron. The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. 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. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. [citation needed]. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. On premium fuel, it was rated at 207 hp at 5200 rpm and . It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. 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. All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". Power output ranged from 135hp (101kW) to 170hp (127kW). He thinks the stock exhaust flow of 180 cfm will suffice for this build. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. Unusual for a major automaker, Pontiac did not have the customary "small-block" and "big-block" engine families common to other GM divisions, Ford, and Chrysler. Price $15500.00. 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. It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. 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.
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