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. Tri-power engine rated at 376 hp. 1975 Factory Service Manual lists the SD-455, but the SD-455 did not meet emissions for the 1975 model year and was canceled. . 1962 Pontiac Catalina 421 Super Duty Royal Bobcat - Collector Car Ads ft. After the SD-455 was certified with the new cam, it was production-ready but was then further delayed by the EPA mandating Pontiac recertify all of its engines when the EPA discovered that part-throttle emissions exceeded the limits. 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. Though production cars only got the two hood air inlets the name was retained. Installed position: 110-deg 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. 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. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . Original plans called for a forged crankshaft, although actual production SD455s received nodular-iron crankshafts with minor enhancements. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. The stroke increased to 4.21-inch (106.9mm). Maximum RPM (high-RPM engine): over 8000 rpm, Engine weight: estimated 550lb (249kg) complete, Power: estimated 640hp (477kW) at 7500rpm, This page was last edited on 30 January 2023, at 13:15. Pushrods: LPC chrome moly By 1963, the more powerful Pontiac 421 was beginning to outshine the 389 for performance applications. 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). 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.. Fuel pump: Will use 110-gph Carter A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. The 1972 455 HO was rated at 300hp (224kW) @ 4,000rpm and 415lbft (563Nm) @ 3,200rpm. Projects - 1964 PONTIAC 421 HO Engine Build | The H.A.M.B. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. or Best Offer. 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. 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. The 428 was increased to 456.12cuin (7,474cc) in 1970. Pontiac Engine Torque Specifications. Every torque specification should be in this table, however if there is one missing, please Contact Me and I will get you the spec and add it to the table. Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. The Best Features Of The Pontiac 2+2 - HotCars Pontiac Engine Torque Specs - Butler Performance Brand: Crower PN 60311, solid The Pontiac Tri-Power Story | Mac's Motor City Garage 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. The manuals had Hurst shifters. 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. Building a rare Pontiac Catalina Royal Bobcat piece by piece Only about 2000 like this one were built with 4 speed Muncie transmissions. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. Distributor: '61 Delco cast-iron with direct oiling It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. The compression ratio will be 10.6:1. 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). Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM 389 Pontiac Engine Build - Restore An Old Car Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. It was the top-of-the-line engine unless one opted for the "Ram Air" V-8 derived from it. . In 1967, the Pontiac 2+2 became an option on the . 1968 - 400 Ram Air I and 428HO Code 37" Ram Air I and. Secondary: Front and rear #70 Only 630 Bonnevilles were produced for 1957, all of them fuel-injected. On this Wikipedia the language links are at the top of the page across from the article title. Pontiac's 428 was a sneak attack in the muscle car horsepower wars 1965 Pontiac Grand Prix with a 421 Tri-Power engine - YouTube 1966 Pontiac Catalina - Oldride Required airflow at 28 in/H2O = HP/ # of cylinders/0.257 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. Learn how Classified Ads works . 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). 068) to 301/313 (No. This was a completely stock car on loan from a private owner for the test. 1969 - 400 Ram Air III or 350HO Code 48. - P.B. Splayed main caps, head bolts tie into main caps. There was also the addition of dual exhaust, and for vehicles equipped with a manual transmission, a slightly more aggressive camshaft. Email Email. 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. There were 11 different Pontiac V8 engine options for 1966, starting with the 326-cid 250-hp Tempest base V8. The Armasteel cast crankshaft was the standard hardened cast-iron crankshaft used throughout the entire Pontiac V-8 line until 1967. Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). 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 326 subsequently became the optional V8 engine for Tempests, and later the Pontiac Firebird, through 1967 and maintained the 17 degree cylinder head valve angle for its entire production run. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Oil pan: 8-quart with extended pick-up, fabricated retention clamp Paul Stenquist. Engine Oil: 95 ft-lbs. The very modest cam, combined with a low-compression ratio of 8.4 (advertised) and 7.9:1 actual resulted in 290hp (216kW) SAE NET. Wearing a revised GM B-body semi-fastback shape, the 2+2 option delivered a 421-cu.in. 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. None of Pontiac's Ram Air engines actually enjoyed any true ram air effect. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. It was rated at 250hp (186kW) with 8.6:1 compression and 260hp (194kW) at 10.25:1 compression. Most Pontiac engines were painted light blue. Although it is much different from the original 1955-vintage Pontiac V-8 powerplant, the 301 has the distinction of being the last true Pontiac V-8 engine, as Pontiac ceased production of these engines effective April 1, 1981. 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. 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. For 1967, Pontiac retired the 389cuin (6.4L) and replaced it with the 400cuin (6,554cc), a 389 bored-out by +0.06in (1.5mm) to a bore and stroke of 4.12in 3+34in (104.6mm 95.3mm). 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. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. Only one is known to survive today. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm Again, its bore was expanded, this time 0.03in (0.76mm) to 4.1525in (105.47mm). In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. 421 Tri-Power/Hurst 4-Speed: 1966 Pontiac 2+2 | Barn Finds Pontiac V8 Engine Codes and Specifications. Pontiac did not release official power ratings for this engine, saying only that it had more than 300hp (224kW). Some 400s were dealer installed. Stock Pontiac Engine Specs - Ron's Pontiac Page 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. Block/Crank combo: '64 four-bolt 421 / '64 OE 4.00-in stroke All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". To learn everything you need to know about car engines, see. 1966 Engine Codes - Ron's Pontiac Page . This was to ensure there was enough fuel to cool the cast offset dished pistons. ARP - The Official Site | Pontiac Kits Pontiac 389 Engine Guide - Muscle Car Club 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. Pre-Owned. The first letter equals the month. 1966 Pontiac Grand Prix - conceptcarz.com All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. McKellar's Masterpiece: The Pontiac Overhead Cam 421 V8 1966 Pontiac 2+2 421 H.O. Tri Power 376 horsepower 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. Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). This engine was first offered in 1967 as the top engine option in full-size Pontiacs. The 287 was an "oversquare" engine with a bore and stroke of 3+34in 3+14in (95.3mm 82.6mm), for a total displacement of 287.2cuin (4.7L). 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. 3.75. Neither casting was equipped with an exhaust crossover. 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. Length: 8.750-inCAM This was the only Poncho with standard 421-cid power. Block casting # 9773157. 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. Most likely prompted by its development of the Pontiac OHC six, the GM division built three different experimental SOHC 421 CID V8 engines in the early 1960s. Pontiac Engine Torque Specs Pontiac Engine Torque Specs. Manage Settings It retained the 421's 4in (101.6mm) stroke and 3+14in (82.6mm) main journal. The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. The 338-bhp four-barrel was the base engine. The Ram Air IV replaced the Ram Air II in 1969. . Pontiac Grand Prix - Muscle Car Club 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. Primary tube diameter: 1.75-in 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. Size cfm: Total flow, 1,050 cfm NASCAR race cars embody the muscle car philosophy of power. At the end of 1976, Pontiac was no longer able to continue production of the 455 (7.5 L) V8 motor due to the tightening emissions requirements. Pontiac 2+2 - Wikipedia Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. 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 . . Reductions in reciprocating weight free up horsepower. As Pontiac's 1967 performance brochure said, "You can add the Ram Air induction hood scoop and new high output cam and valve springs to the Quadra-Power 400 for better top end breathing." 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). I don't know if it can be done, but I'm going to try." This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . 1966 Pontiac Complete 389 Engine YC code 290 HP Block Catalina . Price $15500.00. The engines feature a cast-iron block and head and two valves per cylinder. . In 1963 Pontiac dropped the Buick division built 215 cu. 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). Primary tube length: approximately 31.00 inches 1967 - 400 Ram Air Code 97. Pontiac 421 V8 Specs, Firing Order and Engine Information - Engine Facts It was implemented as further development of a cost-effective, more fuel efficient V8 derivative of the 301 V8 for the CAFE requirements. Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. The Catalina was the base intermediate-sized Pontiac resting on a 121-inch wheelbase that it shared with the Safari and the Grand Prix. The 1958 370" engine and the 195960 389 version was named the "Tempest" V-8 and changed in 61 to the "Trophy" V8. If you enjoy the videos and would like to Sponsor me on Patreon, my Creator link is https://www.patreon.com/MyCarStoryWithLouOn "My Car Story" we're in Huntl. The four-barrel version with 10.5:1 compression upped horsepower to a healthy 285. . The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. For a few more ponies through better oil control, a factory full-length windage tray will be added, since Pontiac didn't use one on this engine originally. Tested: 1968 Pontiac GTO 428 / Royal Bobcat - Car and Driver The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. 1966 Pontiac 2+2 for sale near Rogers, Minnesota 55374 - Classics on Beginning in 1967 casting numbers moved to the rear of the block just behind cylinder #8. A limited-slip differential and gearing up to 4:11.1 were optional. Rocker studs: ARP special 34-in bottom Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. aluminum V8 it had offered in the Tempest and replaced it with a small-bore version of the standard 389cuin (6.4L) Pontiac V8. 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. 1967 was the last year for closed-chambered heads. Unique exterior features included "2+2" badges, twin lens taillamps, and chrome bodyside gills; Pontiac's famous eight-lug aluminum wheels were the ultimate optional touch. 1962 421 super duty motor Price $30000.00. 1966 Pontiac Catalina . Price $14000.00. Intake: 218 cfm at 0.500-in Pontiac . Year. Engine Block Date Code. Engines & Engine Parts for 1966 Pontiac GTO for sale | eBay Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. [22]. Jim Taylor knows this, so he took a mathematical engineering-style approach to finding 100 hp in a relatively optimized engine. Rings: LPC (Liberty Performance Components) premium moly, standard tension "1966 Pontiac 2+2" Thus in March 1973 Pontiac eliminated a timing solenoid that gave full vacuum advance and disabled the EGR valve in high gear after a period of time that happened to exceed the running time of the EPA testing cycle. These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number. This was based on results of over 1 million test miles, which was unheard of at the time. Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). The heads were a new design featuring siamesed intake ports. The engine was dubbed the TEMPEST V-8, a nickname it retained until the end of 1960. The "455 HO" moniker took on a whole new meaning with the introduction of the 1971 model year; Intended as a low compression progression from the previous years Ram Air IV engine, all 1971 455 HO engines used a heavy duty 4 bolt main block, round port cylinder heads (casting #197; with 8.4: compression), "Ram Air" style exhaust manifolds, and a two-part aluminum intake manifold. Bearings: Sealed-Power mains and rods, cam Dura-Bond Today, they have an average value of $430,000 in #3 (Good) condition, while the best in the world is worth about $550,000. 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. 1963 Pontiac Catalina 421 H.O. | HowStuffWorks The code consists of 3 or 4 digits. 4/21: Not just a date, but a legendary 421-cid Pontiac engine that The W72 offered many improvements over the standard L78 400 Pontiac. 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. In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they used until 1975. Detailed specs review of 1964 Pontiac Catalina Vista 421HO Trophy V-8 which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. 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. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . Stock Pontiac Head Specs - Ron's Pontiac Page This was the last run for the 455 (7.5 L) motor from Pontiac, and production ceased on the 455 this year as it could no longer meet the emissions requirements any longer. Idel RPM Automatic In Drive Notes; 326: 1964: 45S: 0.035: . Open pressure: 282 pounds at 1.100-in Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm said the "Pontiac 421 cu. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. Pontiac V8 Engine Tune Up Specifications. 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. [citation needed]. The 1975 455 HO package received some negative press/reviews as some buyers expected to see a return of the 1971-1972 engine, and were disappointed when they received the lower output motor. From 1969 though 1970, the Ram Air IV was available in both A-Body (GTO, including Judge) and F-body (Firebird, including Trans Am) form. Diameter: 516-in Math, not gasoline, makes horsepower under the hood of a Pontiac. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. All 196869 #9792506 Ram Air 400 blocks have 4-bolt caps. The goal of making a Pontiac Hemi succeeded but the engine was never produced. 1968 Pontiac GTO 428 / Royal Bobcat. Rocker arms: Crower roller, 1.6:1 The 303 had shorter connecting rods, smaller 2.5in (64mm) journals and a solid lifter version of the Ram Air IV camshaft. Preparation: Cook, bead blast, magnaflux, bore, true decks, align bore Made with a provision for dry sump oiling, it truly was a racing engine, detuned for use in passenger cars. Along with proper parts selection, accurate machining and assembly are also important Bore/Stroke: 4.150/4.00-in 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. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). 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. Pontiac Blocks Casting Information - Butler Performance It was rated at 366bhp (273kW) (gross) in the GTO version. It produced 120hp (89kW) After 1981, the Pontiac V8 was replaced entirely by the GM "corporate" V8's from Chevrolet and Oldsmobile. 1966 Pontiac Catalina technical and mechanical specifications As a result, peak horsepower dropped from 310 to 290, though torque increased from 390 to 395lb. (imp.) V-8 (coded WG for stick or YH for auto) was the 2+2's base engine. In 1967, the cylinder head design was improved for the 400 4-barrel engine. There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. Pontiac V8 Engine - The engine that sparked the Muscle Car Era 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." After outselling Oakland, Pontiac became the sole survivor of the two by 1932. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. The 389 V8 was first introduced by Pontiac in 1959. Apparently at least one of these engines survives under the hood of an engineer's personal Pontiac. The base engine was the 421 four-barrel with 338 horsepower. . Pontiac Heads - Butler Performance Both Randy and Stan were aware of the . 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 . 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. In 1969, Pontiac also used a revised crankshaft out of a Pearlitic malleable-iron, although it still used the "N" casting letter. From 1959 to 1966 Pontiac continues making improvements. engine, dual exhausts, three-speed manual transmission, Hurst shifter, 3.42:1 rear gears, heavy-duty suspension, bucket seats, upgraded upholstery, carpet, emblems, "Decor" louvers, pinstripes, lower . The 421 also marked the end of the option for a forged-steel crankshaft.

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