My brother has a 1970 Formula with a cubic inch V8 engine in it. Although the 428 was modeled after the Pontiac 421, it had a cast iron crankshaft rather than the steel used in the 421. in. 428 Rebuild Kit Forged Include: Pistons and Ring Kit in Flat or Dish top in . 75:1 in the ’69 428 HO with 390 HP and all 4 bbl 400s had 10. 500 428, ford's only dual-quad mustang 1969 pontiac 428 prix grand hp hoEngine pontiac gto xf hp code firebird Nov 15, 2006 · Those wanting to create the ultimate high-performance Grand Prix could opt for the L79 428 H. High output versions of the 428 engines came in at 390 HP. 9 HP Reduction Ratio: 4:1 Weight: 10 Lbs. Today, the Pontiac Grand Prix is a stylish choice of 1960s car that carries with it much of the eyeball of its GTO counterpart. 1) in 1967 only the 376 hp 428 got the 60 psi pump. 3) (Base, Ventura) Horsepower/Torque Curve Complete performance review and accelerations chart for Pontiac Bonneville Convertible 428HO V-8 (man. The 428ci HO V8 was factory rated at 390 horsepower and 465 lb-ft of torque. 1969 PONTIAC GRAND PRIX 428, 390 HP. 66" exhaust valves. Block Casting: Standard 1973 400 block. 12 in (104. Read more… V 8 (7014 cc | 428. These head numbers represented chamber sizes. Sales exploded to over 112,000 that first year, but only 676 were ordered with the manual. 390-428 FE Engine Rebuilding; 350-455 Pontiac Rebuilds; 350-455 Oldsmobile. David Conwill and Matt Litwin. 1978 pontiac bonneville base sedan 4-door; 2003 pontiac bonneville ssei sedan 4-door 3. The big cheese for 1968, the 428 HO, had picked up a full 14 horses, upping the ante to a very robust 390 hp. 428. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix Hardtop Coupe 428 V-8 4-bbl in 1969 the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. 0 L) by increasing its bore to 4. 25". Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Catalina 4-Door Hardtop 428HO V-8 Turbo Hydra-Matic in 1969 the model with 4-door hardtop sedan body and V-8 6995 cm3 / 426. 5:1: Ignition System: Conventional breaker-point ignition system: Cooling System: Liquid-cooled: Performance Specifications; 0-60 Time: 7. special version. 75 would have been due to combustion chamber size if it was even done at all, no special 428 pistons were produced. However, manual transmission Bonnevilles came with the same 8. Engine Search. 050 212/225, . Complete performance review and accelerations chart for Pontiac Grand Prix Hardtop Coupe 428 V-8 4-bbl (man. a 390 horsepower 428 cubic engine was installed in place of the 400 cubic engine. 350-455 Pontiac Rebuilds; 350-455 Oldsmobile. 400-428 cu in: Horsepower Range: 350-390 hp: Torque: 472-500 lb-ft: The 1969 Pontiac Grand Prix stands as a testament to American ingenuity during an era when 390-428 FE. They borrowed the moniker, “SJ” from the legendary Duesenberg brand. BACK For a more complete and up to date engine codes and other information, try my search page. Edelbrock Performer RPM cylinder heads, Edelbrock cams, intake, carb, balanced and blueprinted, Earson roller rockers, and had the compression bumped down from 10. A second dual-quad drag rendition was introduced with a 13. Proper maintenance and regular oil changes are crucial for keeping your 1968 Pontiac 428 engine running smoothly. 8l; 1961 pontiac bonneville "vista" 4 dr. (inches However, manual transmission Bonnevilles came with the same 8. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Bonneville Hardtop Coupe 428HO V-8 4-speed in 1968 the model with 2-door hardtop coupe body and V-8 6998 cm3 / 427 cui, 291 kW / 396 PS / 390 hp (SAE gross) offered since September 1967 for North America U. All the 421s are 4-bolt main, '67 & '68 428s were all 4-bolt, in '69 the lower-HP engines (360 HP) were 2-bolt. The 428 HO had 376 hp. 040 over, or . Jul 23, 2014 · Pontiac under rated their engines HP wise, and the others tended to over rate them. Jul 9, 2013 · I know that the 69 GP's came in three option/trim packages. Pontiac installed all 428 cubic inch V8 engines in their largest cars. This powerplant features overhead valve valve gear, a 90 degree V 8 cylinder layout, and 2 valves per cylinder. Pontiac continued with Tri-Power options for both the 389 and the 421. The optional 428 cu in (7. According to ProfessCars™ estimation this Pontiac is capable of accelerating from 0 to 60 mph in 6. 8l 131k original miles l@@k read(US $1,695. A separate dual 4-barrel engine with 13:1 compression was also available in 1963, and it was (under)rated at 410 hp. Both models were available with a Muncie four-speed or a Turbo 400 automatic. Nevertheless, dealers like Royal installed the 428 in GTOs and Firebirds. The 428 was one of the “long journal” V8 engines that Jan 17, 2024 · 400 cu in (6. ProCharger kits for Ford FE 390, 428 Engine Pontiac Superchargers Serpentine belt systems are the most street friendly setups and are used for +100 hp over Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Executive Safari Station Wagon 428 V-8 4-bbl in 1969 the model with 5-door station wagon body and V-8 6995 cm3 / 426. The 428 was only available in Pontiac full-size cars. 4l; 1992 pontiac bonneville ssei sedan 4-door 3. Engine was rebuilt balanced with forged pistons. 5:1 (‘62–’63) compression. Pontiac / Oldsmobile; Ford 390, 427, 428 (FE Series) Estimated Horsepower: 1. 350-455 Oldsmobile Rebuilds; FE 352 360 390 406 410 427 428 type engines Auto and Marine . 1969 Pontiac 428 Engine: Specs, Configuration, and Maintenance Published by Engineer on 17/03/2024 17/03/2024 Sep 9, 2020 · 774 likes, 18 comments - pontiac_fever on September 9, 2020: "1969 Pontiac Grand Prix SJ 428 H. 200 rod journals Oct 4, 2015 · At the time Chrysler told the public the motor was making 390 hp at 4700 rpm while in reality its actual capability was 430 hp at 5600 rpm. 30 CL 1969 pontiac grand prix additional info: 1 of only 989- very rare 69 428 ho 390hp grand prix sj- roller only, what you see is it. O. The "068" cam is a good cam, BUT it was made in 1968, with the technology of the time. 719-inch bore. I know the camshafts are different upon application and the exhaust manifolds flow much better on the 390hp. Automatic. Cranking compression is 210. 78-inch stroke, are screamers, with peak torque coming in around 6,000 rpm with high-performance Mar 5, 2019 · Living With A Castilian Bronze 1-Of-968 '69 Grand Prix SJ With A 428 H. S. Safety continued to be key in 1968 with new fender side-marker lights becoming standard. Pontiac used the same codes on different year blocks. ) with 390 HP (287. He had the 428 built to make 500 hp on pump gas. Boasting a 10. Sales dropped to 31,711, but the elegant 1969 model would revitalize the name, and almost four times as many GPs would be sold the next year. I didn’t document this project, but I did it for about $200 by sourcing the used spindles and calipers, rebuilt both calipers and got the rest from RockAuto. Apr 24, 2007 · 10. Two engine sizes were offered with two power options were available in each engine size; a 265 hp 400 cu in, 350 hp 400 CID, a 370 hp 428 cu in, or the 390 hp, high output 428 CID. One used for normal 428, the 428 Police Interceptor, and the 428 CJ before 12/26/69. 00-in mains and BBC 2. This 428CI Pontiac Engine from out 2013 Engine Masters Competition offers 738HP, but is still pump-gas friendly! and at 3. 04 KW) Q: What transmissions did the 1969 Pontiac Grand Prix have? A: The 1969 Pontiac Grand Prix had the following gearbox options: Automatic, 3 speed Manual, 4 speed Manual. The 455 cu in (7. Engine has been stored inside for years but is very complete, has chrome valve covers and includes a 400 tranny. pink slip, vin and data tag is attached. In 1964 Pontiac reduced the bore size to what was correct for 326 inches of displacement, a 3. V-8 removed and the full, top-of-the-line 428-incher inserted—with enough fiddling inside the replacement engine to bump the output up some unspecified Sep 1, 2018 · 1968 Pontiac 428 HO WJ-code, 390 HP. As the most powerful motor in the Pontiac stable (at least on paper), the HO consisted of a 428 bore - 4. Figure at least 350 hp, even through cast-iron exhaust manifolds. It was one of the largest engines Pontiac produced, but it was used more to power big cars such as the Bonneville, and not as much for performance cars such as the Firebird. 406"/. I may regret the decision to not go power, but the booster takes up a LOT of room. For 1968, those ratings were bumped to 375 and 390 hp, respectively. Sep 23, 2018 · In 1969, Pontiac also offered the new Grand Prix as an SJ model, an option package that combined niceties including automatic level control, power front disc brakes and a four-pinion differential in the rear axle, in addition to the 428-cu. 6:1 engine at just 265 horsepower. 61. 23 rear axle was a special-order option. Unwanted By A Mopar Collector, This '69 428 Grand Prix SJ Exhibits High Class With High Power. Pontiac Grand Prix 428 HO 390 PS Technical Data Sheet: specifications & performance figures (top speed, acceleration, quarter mile, 0 to 100 mph, standing start, recovery, braking, lap time) to compare with direct competitors! Jan 1, 1970 · A GTO with the standard, puny, 400 cu. Description of 1969 Pontiac Grand Prix Model J: 1969 Pontiac Grand Prix Model J 428! This extremely rare 428,4-barrel, TH400 automatic, with bucket seat and console, power brakes, power steering and A/C the car has all the must have options of the day. 9 cui, 276 kW / 375 PS / 370 hp (SAE gross) engine offered since September 1968 for North America . 3) in 1968, the model with 2-door convertible body and V-8 6998 cm3 / 427 cui, 291 kW / 396 PS / 390 hp (SAE gross) engine offered since September 1967 for North America U. 8 in The 428 was Pontiacs top engine for 3 short years- 1967-9. t. The 428 had the same 4 in (100 mm) stroke as the 421, yet retained the 421's 3. It was designated officially at Pontiac as a "regular performance" model, a thoroughly confusing designation for a vehicle that was clearly intended to be to the Catalina platform what the GTO was to the A-body Lemans: the standard drivetrain was a 2-barrel Mar 21, 2024 · The Pontiac 428 engine belongs to the legendary Pontiac V8 engine family. 74 l). Specifications listing with the performance factory Oct 3, 2020 · That’s a 428 HO engine that produces 390 horsepower. Specifications listing with the performance factory data and ProfessCars Jul 13, 2018 · I have a Pontiac Firebird -71 with a Pontiac 428 YH -68 with a TH400. 6 L) V8, 428 cu in (7. , existed in the same era as the Ram Air III and Ram Air IV. In 1967 the 421 was enlarged to 426. The 390 Ford is the slowest of the bunch, with the 396 and 383 being about the same. For 1968 the 326 was also bumped up to 350 cubic inches (5. Photo: Mecum. 406" lift with 1. O - 390 HP Follow for more #pontiac #gto #transam #firebird #formula # Any experiences with stroking a 428 with a 455 crankshaft? What's the gain in HP? What extra machining besides boring +30 or 40? Any specific Cam requirements for roller rockers, need to run roller cam for street/strip/cruise use? Aug 7, 2014 · The first 428 was rated at 375 horsepower, while the second was the 390-horse 428 HO. This included (from 1967 on) 400, 428, and 455 cid V8 engines, which could punch out as much as 390 horsepower and 465 lb-ft of torque. In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads. | 7. 428: 390 hp: 2. It came out of a wrecked car and has around 90K on it and will need to be rebuilt. Upgraded the factory drum brakes to disc in the front, manual. The Pontiac Bonneville Convertible 428's engine is a naturally aspirated petrol, 7 litre, overhead valve 90 degree V 8 cylinder with 2 valves per cylinder. 75:1 390 HP cams - 067 auto, 068 manual trans. Despite the improved breathing, Ford claimed the 428 Cobra Jet produced 335 hp, just 10 more ponies than a 390 did. It's powered courtesy of a naturally aspirated engine of 7 litre capacity. Detailed Engine Specifications Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Bonneville Hardtop Coupe 428HO V-8 in 1969 the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. This engine is a true testament to Pontiac’s commitment to performance and power. Apr 28, 2020 · The 428’s extra displacement brought extra power, with 360- and 376-hp variants in 1967 supplanted by 375- and 390-hp variants for 1968 and ’69. Cars built after January 1, 1968, included front outboard shoulder belts as standard equipment. Of course this is from the old "H-O racing" books which are cool, but REALLY dated now. 0 L) V8: Displacement Range: 400-428 cu in: Horsepower Range: 265-390 hp: Torque: 472 lb-ft at 3200 rpm for the 428 cu in engine: Compression Ratio: 10. 25” stroke with a total cubic inch of 426. 0-liter), tuned for either 375 or 390 hp The Pontiac 428 cubic inch engine was used only from 1967-69. Pontiac 400 Block 4 Axis CNC Machined to Perfection Block; Brass Freeze Plug and Small Parts Kit; Pontiac Crank Reconditioned Undersized to Specifications; Pontiac Rods Reconditioned to Specifications; New Cam, Main and Rod Bearings; OEM Replacement Pistons for 87 Octane Pump Gas; Plasma Moly File to Fit Rings; OEM Replacement Camshaft (others Sep 5, 2019 · On Catalinas, those with a thirst for speed could specify a 360-hp 428 with four-barrel carburetor (which was the standard engine on Bonnevilles) or the top engine, a 390-hp 428 high-output engine with four-barrel carbs. 600 inches we were at 428 ci, which is a legacy Pontiac number. Two 421 H. com. Specifications listing with the performance factory data and Jul 5, 2024 · Notably, every factory offering of the 428 HO was a high-powered variant, ensuring that any Pontiac 428 encountered today retains its potent capabilities. Oct 15, 2009 · What makes the 1968 pontiac 428 (engine code YK) 390 horsepower as oppossed to the 375 horsepower of the 428 engine code YH? However, manual transmission Bonnevilles came with the same 8. 7 liters. 5:1 compression ratio and had 360hp. Specifications listing with the performance factory data All Pontiac Bonneville Convertible versions offered for the year 1969 with complete specs, performance and technical data in the catalogue of cars. 0 L. Thomas A. Compression increase of a measly 1/4 point from 10. It features a displacement of 428 cubic inches (7. Specifications listing with the performance factory Sep 15, 2022 · This 2+2 was optioned with the High Output 376-hp 428 backed by a four-speed; with fewer than 23,000 original miles, it’s only needed regular maintenance. This is a true survivor wearing most (if not all) of its originalLimelight Green paint. The Pontiac Catalina/Ventura Hardtop 428 belongs to the 252 model family from Pontiac. The 390 and 427, with a 3. In fact, they used the SJ insignia on the most powerful Duesenberg cars back in the day, so Pontiac wanted to get a piece of that legend with the Grand Prix SJ. Jul 1, 2023 · In the real world, the true output of the 1962 Pontiac Catalina 421 Super Duty is likely closer to the 465 hp mark, well over twice the power of the base 389-cid unit. -----Engine specs:. Right? Jul 3, 2019 · It featured a high output 428 V8 engine that delivered 390 HP and a host of other performance options. Dec 3, 2014 · The 9779068 cam, letter stamped 'S' on the nose for identification, is the most versatile Pontiac factory performance cam ever produced. Points in dist with quadrajet. Apr 13, 2016 · Pontiac's 421 had already gone to 428 with a bore-diameter increase in 1967. Technically a midyear offering, the 1968 1/2 CJ combined 427 Low Riser heads, a cast iron copy of the aluminum 390 Police Interceptor The Ram Air IV made 345 horsepower and 430 torque in the Pontiac Trans Am. Oct 28, 2016 · I bought a 66 gto with 428 4speed with air. And A Turbo 400 For All These Years Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix SJ Hardtop Coupe 428 V-8 4-bbl 4-speed in 1969 the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. See All 30 Photos. 5:1 370 HP cams - 066 auto, 067 manual trans. 80 all you really got especially in auto trans application were long branch exhaust manifolds and thus oil filter rotator block. 4) Horsepower/Torque Curve; characteristic dimensions: outside length: 5494 mm / 216. Jun 27, 2017 · The Edelbrock Performer RPM 390 FE head is a great power-adder for hp and torque. 1969 Pontiac Grand Prix SJ 428. Specifications listing with the performance factory Improvements were made and by the end of its line produced 370 and 390 horsepower in both versions. Additional underbody images are provided in the gallery below. 428 Tomahawk Performance Products crankshaft, 3. 0 liters) and was produced from 1967 to 1969. Overall, the Ford 390 engine is considered to be very reliable and solid. 455 CI was option. Second, the 2nd gen ’69 & ’70 models still had high compression – 10. gasoline (petrol) engine with displacement: 6558 cm3 / 400. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Chevrolet Corvette Stingray 427 V-8 Turbo-jet 390-hp 4-speed in 1969 the model with 2-door fastback coupe body and V-8 6996 cm3 / 426. Horsepower 420 Torque 450 390cid Mar 15, 2009 · Okay, my dad has a 1966 Galaxie 500. For $650. This 1969 Pontiac Whether your vehicle is a GTO, Fire Bird, Trans Am, Lemans, or a timeless classic, here at Proformance Unlimited we are here to help design and build the eng Mar 4, 2004 · 428s are great engines, and a complete, rebuildable one is easily worth the $600. The base was the Model J with 400 CI engine and 3 speed manual trans with option for 428 CI and TH400 auto. Had headers on it I changed to ram manifolds. . Dec 15, 2023 · English: The 428ci Pontiac V8 engine in a 1969 Pontiac Grand Prix SJ at the 2023 Greenwich Concours d'Elegance. Check Details 1968 pontiac firebird. For Pontiac, this was a serious achievement that helped establish their image as a true performance brand under the watchful umbrella of General Motors' big brass. Specifications listing with the performance factory data 1969 Pontiac Grand Prix Model J Additional Info: 1969 Pontiac Grand Prix Model J 428! This extremely rare 428,4-barrel, TH400 automatic, with bucket seat and console, power brakes, power steering and A/C the car has all the must have options of the day. 5:1 compression ratio ran 375 hp at 4800 rpm and the one with 10. Specifications listing with the performance factory data and ProfessCars Dec 1, 2007 · Dust off Your Small-Bore Pontiac, Stroke it to 383 Cubes and Make 460+ HP. 5 kW / 375 hp / 380 PS ( SAE gross ), torque: 640 Nm / 472 lb-ft, more data: 1968 Pontiac Grand Prix Hardtop Coupe 428 V-8 4-bbl 4-speed (man. 5:1 to I think, 9. to 290 horsepower and 360 horsepower before reaching 375 V 8 (7014 cc | 428. In 68 and 69, the one with 10. pushed the 428’s output to 390 hp. 23 rear end, some of the many options include- tilt wheel, soft tint glass, AM/FM stereo with a factory eight track tape player, it has all the original Pontiac rubber floor mats front and back, the Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Catalina 4-Door Sedan 428HO V-8 4-speed in 1968 the model with 4-door sedan body and V-8 6998 cm3 / 427 cui, 291 kW / 396 PS / 390 hp (SAE gross) offered since September 1967 for North America U. 1963 Pontiac 421 CID Engine Specifications Mar 17, 2024 · 1968 Pontiac 350 Engine: Specs, Configuration, and Service Intervals 1968 Pontiac 350 Engine Specs Engine Configuration The 1968 Pontiac 350 engine was a V8 engine that belonged to the Pontiac V8 engine family. Coupe versions offered for the year 1969 with complete specs, performance and technical data in the catalogue of cars. The Pontiac 428 High Output, commonly referred to as the 428 H. While the standard 400 stayed at 350 hp and the low-compression version maintained its 265 horses, both 428s had picked up some power. Feb 28, 2022 · Year Make Model Engine HP Transmission Rear End 0-60 Time 1/4 Time 1/4 MPH Magazine Notes 1969 Pontiac Grand Prix 428 390 3spd auto 3. David Conwill and Matt Litwin. 15Valve seats are being cleaned up with a nice multi-angle valve job, along with new valves gasoline (petrol) engine with displacement: 6998 cm3 / 427 cui, advertised power: 279. The 428 CI engine was disassembled and blueprinted to produce more than the advertised factory 390 horsepower and easily spinning to 5700 RPM's. , 390 HP @ 5100 RPM Rochester Quadra-Jet 4-barrel carburetor 2. The 1969 Grand Prix featured a sporty and luxurious interior with a wraparound cockpit-style instrument panel that placed virtually all controls and gauges within All-new for 1969, Pontiac's Grand Prix boasted a unique body for the first time. Specifications listing with the performance factory data and The Pontiac Catalina/Ventura Hardtop 428 is a 4 door saloon (sedan)-bodied motor vehicle with a front positioned engine powering the rear wheels. The engine was rebuilt about 8 to 10 years ago, but I can not verify that though. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Bonneville Hardtop Coupe 428 V-8 4-bbl in 1969 the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. 75:1 ran 390 hp at 5200rpm. All Pontiac Grand Prix 3rd-gen. 2 cui, advertised power: 216 kW / 290 hp / 294 PS ( SAE gross ), torque: 580 Nm / 428 lb-ft, more data: 1968 Pontiac Catalina Hardtop Coupe 400 V-8 2-bbl (man. All specifications, performance and fuel economy data of Pontiac Catalina Convertible 428HO V-8 4-speed (291 kW / 396 PS / 390 hp), edition of the year 1968 since September 1967 for North America U. DeMauro Photographer James Miles Writer Holley 950 HP carb Ported Performer RPM Intake SD Performance Street/Strip 6X Heads Comp Cams Hydraulic Roller Cam KB Pistons 9. All 389 SD engines were dropped. 6-liter) or a pair of 428 inchers (7. 5" dual exhaust It is the 428 in. This 630hp Pontiac 428 Is A Rip Roaring Example Of Tin Indian Horsepower. 5 kW / 365 PS / 360 hp (SAE gross) offered since September 1968 for North America . 390 horsepower (engine code WL), 4 carbs, manual transmission. 428 370 HP, Number 16 heads, screw in studs, big valve. 1967 Pontiac Grand Prix 428 HO specs, 0-60, performance data, top speed, engine specifications, pictures. Oct 30, 2017 · The engine options list also included 265- or 350-hp versions of the 400 V-8, and 370- and 390-hp versions of the 428. There was also an optional 428-cid V-8 at 370 hp, and a high output 428 engine with 390 hp. Has a edelbrock 750cfm Carburetor with a holly intake. 55 6. It's just that the Pontiac has a bit more oomph, especially down low in the RPM range. 8 sec Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix SJ Hardtop Coupe 428HO V-8 4-speed in 1969 the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. A 390 hp 428 V8 in a 1969 Grand Prix SJ. Ford’s mighty 428 Cobra Jet combined the high-flowing heads from the 427 with a serious cam and a dual-plane intake topped with a four-barrel carb. as video will say in the header. The single 4-barrel version was rated at 390 hp, while the dual 4-barrel unit was rated at 405 hp as in 1962, even with the increased compression ratio. From 1970 to 1979 The 350, 400, and 455 engine size is stamped on the left front of the block. Feb 5, 2005 · There were two 428's. Two 421 HO. At the height of the horsepower era, Pontiac engines reached ratings of 390 hp (291 kW; 395 PS) (SAE gross), though other engines achieved considerably higher outputs. Based on a stretched A-Body (LeMans, GTO), the second-generation Grand Prix filled a niche: a personal luxury coupe larger than the Mustang-based Cougar yet nimbler and sportier than offerings like the Oldsmobile Toronado, Cadillac Eldorado, and Ford Thunderbird. My service manual identifies the pistons and the cylinder heads as being the same with both engines using no 62 heads. This engine produced 360 and 376 hp (268 and 280 kW) in 1967, 375 and 390 hp (280 and 291 kW) in 1968 and 360, 370 and 390 hp (270, 280 and 290 kW) in 1969. The car proved to be an instant hit, with 112,486 units built for the model year, starting at a base price of $3,866. 5:1 rockers, 63 degrees of overlap, 116 degree lobe separation angle and a 113 degree intake centerline. 389-4 barrel w/automatic transmission; 1964 pontiac bonneville base 6. The base 350 hp 400 cu in (6. In 1969, Grand Prix buyers could choose from two engines and four power levels. 6L) V8s, Pontiac offered two 428 motors in the ’69 Grand Prix. 00. Pinion Gear: 11 tooth Engine offerings were similar to 1967 with revised horsepower ratings including 340 for the four-barrel 400, 375 for the 428 four-barrel and 390 for the 428 HO. Pontiac timidly rated it at 410 hp. 5" dual exhaust Mar 29, 2021 · The 428 cubic inch V8 engine with the HO designation was rated at 390 horsepower from the factory. Two were offered for 428 Super Cobra Jet before and after that date. Specifications listing with the performance factory data and Have been shopping for a 400-455 engine to replace a 301 engine in my 79 T/A and stumbled across a late 60s Pontiac 428 HO 390 HP engine. It represented the apex of Pontiac’s air induction engineering and our continuous innovation despite never being factory-installed in a production car. 12". Bonneville buyers in 1969 found another horsepower increase waiting – up to 360 for the new year, which made the 390-hp 428 almost superfluous, unless you got the close-ratio 4-speed manual transmission and limited-slip Safe-T-Track rear axle. Check this link for the 370 vs. i. Sep 6, 2023 · 428 pontiac horsepower barrett gto sneak hagertyPrix grand pontiac ho fastestlaps models 1965 specs mopar forum Pontiac yh 17501963 pontiac catalina. The least powerful engine was a 400-cid V-8 at 265 hp, but most cars were delivered with the standard 350-hp 400-cid motor. We don’t buy it. (425 HP) to 290 horsepower and 360 horsepower before reaching 375 horsepower and 440 pound-feet of torque with an available 390 horsepower variant. Specifications listing with the performance factory Sep 18, 2005 · 68 428 390 hp motor 68-69 GTO Tempest & LeMans TECH. 030 over, . 370 HP the engine is stamped XF all original numbers matching, it’s made up to the turbo 400 transmission and has the posi, 3. The dual-quad drag variant -- now with aluminum exhaust manifolds standard and steel manifolds optional -- was again underrated at 405 hp. Mar 31, 2024 · Pontiac 428. The Pontiac Bonneville Convertible 428 is one of the 262 range of cars from Pontiac. Crankshaft: Original Pontiac 400 crankshaft Dec 5, 2020 · But then it hit me: they both had 390 hp, did the 1/4 mile in 15. Has updated camshaft kit (competition cam 51-232-3 under google search). Ford 390 Engine Reliability and Problems. 11 / 1. 25 in (83 mm) Main journal, and was produced from 1967 to 1969. htp. (Image/OnAllCylinders) Speaking of engines, in 1970 the fire-breathing 455ci powerplant was added to the Grand Prix SJ. 030 overbored 428 YH -68 (433Ci?) 375hp (stock) Pontiac #13 heads Forged piston 2282P Holley Street Dominator intakemanifold Holley 750cfm, 0-4779C carb. It is powered by a naturally aspirated engine of 7 litre capacity. FAQ: Members List: Social Groups: Calendar: Search: Today's Posts: PY Albums: FAQ In its final version, it was capable of producing between 360 and 390 horsepower The Pontiac 428 was built to last, using high-quality materials like a stronger steel alloy and Armasteel cast. 2) in 1968 the 376 and the new 390 Hp 428 got the 60 lb pump. V-8 with 390 hp. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix SJ Hardtop Coupe 428HO V-8 Turbo Hydra-Matic in 1969 the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. 75:1 C. 9 cui, 268. The SJ H. Rated 390 horsepower stock, the highest horsepower rating of any stock Pontiac engine. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Bonneville Station Wagon 428 V-8 4-bbl 4-speed in 1968 the model with 5-door station wagon body and V-8 6998 cm3 / 427 cui, 279. Don't get me wrong, they are all strong engines. Part of Pontiac’s struggle stemmed from the fact that the company had announced the return of the High-Output motor in 1975. Pontiac GTO: Icon of Muscle Car Era. With torque of 472 or 465 lb-ft, respectively, either would propel this Pontiac with authority. The Pontiac 428 was introduced at the same time as the Pontiac 400 V8 in 1967 and used primarily in the Grand Prix, but also for the legendary GTO and Firebird models. 1969 428 Pontiac Grand Prix SJ - Banished Brute. Sep 23, 2006 · Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. 6 L) engine was still standard, but a low-compression 400 CID engine was available with a two-barrel carburetor. It featured a displacement of 350 cubic inches or 5. But by 1975, performance had taken a back seat to luxury and a new “LJ” model slotted above the SJ. 0 liter) V-8 engine 10. Sometimes you will see a 428 cubic inch V8 engine retrofitted in a GTO or Firebird. Sep 15, 2022 · This 2+2 was optioned with the High Output 376-hp 428 backed by a four-speed; with fewer than 23,000 original miles, it’s only needed regular maintenance. The stroke is 4", the main journals are 3. Specifications listing with the performance factory data and Oct 16, 2020 · Let's talk about how in the world Pontiac gave the 1969 428 HO motor a 390 hp rating when the 1969 366 hp 400 RAIII manual trans motors atleast for the first half of the production run had more Cam and with the small chamber casting number 48 heads far more compression ! There was also an optional 428-cid V-8 at 370 hp, and a high output 428 engine with 390 hp. 060" Over The Super Duty engine came in three flavors: 4-barrel rated at 390 HP and the 2 4-barrel engine which was either 405 or 410 HP depending on the camshaft. special version, including acceleration times 0-60 mph, 0-100 mph, 0-100 km/h, 0-200 km/h, quarter mile time, top speed, mileage and fuel economy, power-to-weight ratio, dimensions, drag Mar 27, 2016 · The 428 (and 421) Pontiacs are said to be "Perfect" with their 4" stroke. 060 inch with deck plate, short fill with Hard Blok. The low-revving Poncho 428 barely needs to be above idle speed to melt rubber, but outfitted as this car is with the 390-horse H. 75 in the 428 engines. The two and four-venturi setups used iron intake manifolds, while the Tri-Power got a high-flow, aluminum intake manifold. option, a Muncie M20 wide-ratio four-speed with giant Hurst The ten horsepower increase over 1968’s engine is due to a slightly hotter cam plus the use of the # 48 big valve heads, the same head used on the Ram air 3 400″ 366 hp (273 kW) engine and the 428-HO engine at 390 hp. Preparation: Bore . 5 seconds: 1/4 Mile Does anybody know off hand what Pontiac did to raise the compression from 10. They are usually stamped on the machined pads by the valve covers. Specifications listing with the Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Chevrolet Corvette Stingray 427 V-8 Turbo-Jet 390-hp 4-speed in 1968 the model with 2-door fastback coupe body and V-8 6996 cm3 / 426. When I bought the car, I replaced the holly Feb 5, 2005 · There were two 428's. After that date Ford offered one crankshaft for 428 CJ. in Pontiac V-8 with up to 390 available horsepower. phs reads as follows-vinle roof,black, 428ho eng. 9 cui, 291 kW / 396 PS / 390 hp (SAE gross) offered since September 1967 for North America U. Duration at . 5 Litre” in metric-speak, at least that’s what the badges claimed on GTOs of similar vintage. Since that time it has been used as a performance engine in several cars by drag racers. 119,000. Specifications listing with the performance factory data and May 20, 2022 · Above two 400 cid (6. Specifications listing with the performance factory data and ProfessCars From 1968 to 1969 only he 428 had the engine size stamped in between the freeze plugs. Just how much horsepower a stock Pontiac 400 or 455 block can handle is a question that Butler has been asked The Grand Prix 428 is a rear wheel drive coupé passenger car with a front positioned engine, sold by Pontiac. 5:1 compression Stock Rods with ARP Bolts, shot peened and polished 4 Bolt Main Block (1969 YK 428/390 HP) Doug's Headers- 1 7/8" tubes, 2 1/2" exhaust with Magnaflows Mar 11, 2021 · However, from 1967–69, the 428 was the top engine for Pontiac’s full-size series. Advertised duration of 288/302 intake/exhaust. 390 HP We found this as part of a discussion at Pontiac Heaven: "The top 428 for 1969 was again the 390hp rated "HO" version with I bought it and got a new title for it. 5 kW / 380 PS / 375 hp (SAE gross) offered since September 1967 for North America U. 10. Apr 20, 2018 · It was rerated at 300 hp at 4,000 rpm and 415 lb-ft at 3,200 rpm. 428ci pontiac engineRebuilding shelby's g. 428 390 HP WJ,YK 1969 350 265 HP WC,WP,WM,WU 400 220 HP PWH,LAST 400 Pontiac V8 Bore and Stroke Sizes CUBIC INCHES BORE(inches) Stroke(inches) Main Dia. 5 L) with 500 lb⋅ft (680 N⋅m) of torque at 3,100 rpm. 10 95. Motor is apart block has been tanked and rough bored, heads are apart and have been tanked #62 heads, intake has been hot tanked, crankshaft has not been touched will need to be turned. Specifications listing with the performance factory data and Sep 23, 2006 · Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Number Three: Oldsmobile 455 W-30 Who would have figured that out of the three B-O-P (Buick-Olsmobile-Pontiac) group that it would be mostly overlooked Oldsmobile who would have the most powerful engine of 350-455 Pontiac. clear calif. The addition of the 4-speed manual transmission makes this, as the seller claims, 1 of 94 produced in that configuration. Engine Oil Specs & Service Intervals. The short block is 4 bolt 1969 390 hp, heads are #48 castings and a holley street dominator, dont know the cam size it is hyd. 0L/428 Pistons and get Free Shipping on Orders Over $109 at Summit Racing! Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix Hardtop Coupe 428HO V-8 4-speed in 1968 the model with 2-door hardtop coupe body and V-8 6998 cm3 / 427 cui, 291 kW / 396 PS / 390 hp (SAE gross) offered since September 1967 for North America U. was rated at 390 hp and featured high-flow Find PONTIAC 7. front bumper is nice, i have the front inner wells somewhere,should find them. To differentiate them it will have to be determined what year the block is. Short Block . item 1 MUSTANG COUGAR 390 428CJ ENGINE MOTOR MOUNT BLOCK PLATES 1967 1968 1969 item 2 PONTIAC 428 YH 1969 Hi Performance Balanced Engine FREE professional Jan 24, 2016 · Also, all 69 GP standard 370 hp and 390 hp 428 HO's received the same standard non ram air carbs 7029268 auto and 7029263 for 4 speeds. 0 cu in. 3) in 1969 there was three different hp 428 motors offered and I would guess that out of all 3 of them that the 360 hp model did not have the 60 psi pump. 8 Ford 428 Cubic Inch Cobra Jet V8 Oct 14, 2016 · Just a few ‘minor’ nits; the 389 was a “6. 5 to 10. V-8s produced 353 and 370 hp, respectively, but the hottest options of all were the 390-, 405-, and 410- hp 421 Super-Duty choices. 5 kW / 365 PS / 360 hp), edition of the year 1969 since September 1968 for North America , including acceleration times 0-60 mph, 0-100 mph, 0-100 km/h, 0-200 km/h, quarter mile time, top speed, mileage and fuel economy, power-to-weight ratio, dimensions, drag coefficient, etc. is regarded by many Poncho experts as the most versatile street engine Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix Hardtop Coupe 428 V-8 4-bbl Hydra-Matic in 1968 the model with 2-door hardtop coupe body and V-8 6998 cm3 / 427 cui, 279. Other changes from the Ram Air III include rounded port heads and an aluminum intake manifold that saved about 15 lbs Mar 17, 2024 · The engine configuration of the 1968 Pontiac 428 was designed to provide exceptional power and torque, making it a favorite among muscle car enthusiasts. 8l; 2002 pontiac bonneville sle sedan 4-door 3. Nov 9, 2023 · The Tri-Power 390 had 10. They had forged steel cranks. GM's excitement division during the 1960s and early 1970s, those figures grew to 375 and 390 hp, while in 1969, the V8 was rated at either 370 or 390 hp. Westwood, New Jersey, United States. The model SJ came with 428 CI and 4 speed or TH 400. 9 cui, 291 kW / 396 PS / 390 hp (SAE gross) offered since September 1968 for North America . Three-speed manual shift was standard, with Turbo Hydra-Matic optional—and frequently ordered. 61 cu in (7. Initial power output was 360 hp or, in High Output (HO) configuration, 376. 7 14. The fifth generation of the Pontiac Catalina, now separate from the full-sized lineup though with similar options, lasted from 1971–1976. 0L). Our Pontiac Grand Prix, 1 of 94 produced with the 428HO 4 speed optionsFrame off restoration completed in 2016Everything restored, rebuilt or replacedOriginal numbers matching engine, transmission and rea Dec 1, 2023 · At the business end, the choices were limited to the standard 400-cubic-inch, 350-hp /355 PS V8 (Pontiac’s famous 6. Pontiac continued with Tri-Power options for both the 389 and 421. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Chevrolet Caprice Custom Sedan 427 V-8 Turbo-Jet 390-hp 3-speed special in 1969 the model with 4-door sedan body and V-8 6996 cm3 / 426. The 428 CJ cylinder heads featured an un-machined chamber of 73-76cc, 2. COMP Cams XE268H camshaft Ohio Crankshaft Hedman Hedders 28150, ceramic coated 2,5" exhaust All specifications, performance and fuel economy data of Pontiac Bonneville Convertible 428HO V-8 (291 kW / 396 PS / 390 hp), edition of the year 1969 since September 1968 for North America , including acceleration times 0-60 mph, 0-100 mph, 0-100 km/h, 0-200 km/h, quarter mile time, top speed, mileage and fuel economy, power-to-weight ratio, dimensions, drag coefficient, etc. The power is produced by a naturally aspirated engine of 7 litre capacity. According to ProfessCars™ estimation this Pontiac is capable of accelerating from 0 to 60 mph in 5. 1969 pontiac grand prix 428 ho he we have a very rare car, 1969 grand prix, 428 ho 390 hp, long branch cast iron headers factory, black on black car, turbo 400 trans, posi rear end, 355 gears, leather inside, lots of power options, this car is super rare not to many made, one repaint done very well, drives like a dream, very fast, on apr-17-17 at 09:35:48 pdt, seller added the following Jan 31, 2018 · It was a de-stroked version of the 389 with a four-barrel carburetor and 260 hp. An oil change was performed recently. Power is sent to the rear wheels via a three-speed automatic transmission. 75:1 compression ratio, the 428 H. he we have a very rare car, 1969 grand prix, 428 ho 390 hp, long branch cast iron headers factory, black on black car, turbo 400 trans, posi rear end, 355 gears, leather inside, lots of power options, Learn about the specifications and maintenance requirements of the 1969 Pontiac 428 engine for optimal performance and longevity. It should have #62 heads. Block castings are different, but not a big deal. The 428 has remained one of the favorite Pontiac The Grand Prix SJ got Pontiac’s 370-hp 428 or the optional 390-hp 428 H. A contemporary Pontiac 400 V-8 Ram Air III in the GTO was rated at 366 hp in 1969, and the elusive Ram Air IV was rated at 370 hp. (7. The four-barrel version, set up for sustained high speeds, had 390 hp. Pontiac 428 H. What was the differe Nov 21, 2016 · Ford really got it right with the 1968 428 Cobra Jet (CJ). 0:1 squeeze. Despite only two years in production run, the 455 H. 12” bore and a 3. 5:1 in ’70. The bore is the same as the 400 at 4. V8s produced 353 and 370 hp, but the hottest options of all were the 390-, 405- and 410-hp versions of the 421 Super-Duty V8. Both Chevy and Ford had 427 cu in performance engines, so Pontiac simply referred to its 427 as a 428 to one-up them. 00) Cameo White exterior 428 cu. R. 06" intake valves and 1. 6 mm). Nov 22, 2023 · Although the LS engine power outputs varied between models, the LS6 in the Chevelle produced a whopping 450 hp, and even the LS5 in Chevy’s Corvette put out 390 hp. 6:1 (‘61) and 10. Pontiac released a revised cylinder head for its Super Duty engines early in Cameo White exterior 428 cu. 120" The 428 engines have far superior cylinder heads (bigger valves and ports, dfferent valve angle) compared to the 421 engines. 5:1. Specifications listing with the performance factory All specifications, performance and fuel economy data of Pontiac Bonneville Station Wagon 428 V-8 4-bbl (268. Pontiac Grand Prix 428 HO is an automobile that has a 2 door coupé body style with a front positioned engine powering the rear wheels. The Demise Of The Pontiac 455. 5 L) V8 was the largest and available in most Pontiacs except in the compact-size cars. 0 seconds, had almost identical 0-60 times, got 11 mpg, handled quite well, and offered reasonably comfortable accommodations for four adults. One of just 208 convertibles built with the 428 and four speed, the drivetrain is unusual for a Bonneville, and when you factor in the convertible body style, you have yourself These kits include Butler selected parts that work together to rebuild your Pontiac to better than new condition. 428 was available in 370 and 390 HP. As we mentioned, the 428 was mostly exclusive to the Prix and Bonneville/Catalina—this was a result of GM’s strict internal policy limiting the engine size of midsize cars to 330 cubic Inches. If it's an SJ and that's the original engine in it, chances are it's a 4-bolt main. The standard 428 was now up to 375 hp, just one horse shy of the previous year's HO. Mar 29, 2017 · Both Firebirds are not merely consistent show winners; they are the fastest Pontiac entries in both racing series. For 1970, the 350-hp 400-cid engine was still standard, but buyers could opt for a 455-cid engine at 370 hp or the detuned 400-cid engine at 265 hp. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Grand Prix Hardtop Coupe 428 V-8 Quadra-Power 4-speed in 1967 the model with 2-door hardtop coupe body and V-8 6998 cm3 / 427 cui, 280 kW / 381 PS / 376 hp (SAE gross) offered since September 1966 for North America U. 0 L) V8 rated at 370 and 390 hp (290 kW) in 1969 was replaced by a new 370 hp (280 kW) 455 cu in (7. The seller identifies this block as a XF-coded four-bolt main block, and maybe our Pontiac experts can identify this as the 370 or 390 HP 428 (7. 77: 72 cc The new 428 had a 4. Next to the distributor hole there is a casting number that has a letter with 2 or 3 numbers. Mar 1, 2004 · What makes the 428 different from the 390 is torque at lower rpm ranges. Pure-Stock Series 1968 Pontiac Firebird Ram Air 400. 3 in, width: 2027 mm / 79. 77: 72 cc The designation 2+2 was borrowed from European sports car terminology, for a seating arrangement of two in front plus two in the rear. 04 KW) Q: What transmissions did the 1969 Pontiac GTO have? A: The 1969 Pontiac GTO had the following gearbox options: 3 speed Manual, 4 speed Manual Close Ratio Gearbox, 4 speed Manual Wide Ratio Gearbox, Automatic Turbo HydraMatic. Remember Me? Join us now! Menu. That High Output 428 was a new offering for ’67 and was the top-spec engine available in Pontiac’s full-size line. The biggest engine was the 428-c. Head ID Location However, manual transmission Bonnevilles came with the same 8. The 3. There does not need to be an LS engine in everything. The Pontiac GTO epitomized the muscle car era with its blend of power and performance, particularly through its legendary Ram Air IV and Judge models. 9 cui, 291 kW / 396 PS / 390 hp (SAE gross) offered since September 1968 for North America U. In 67, one had 10. 9 cui, 276 kW / 375 PS / 370 hp (SAE gross) offered since September 1968 for North America . 350. When you consider that the 428 HO engine upgrade was $184. Rated anywhere from 360 to 390 horsepower (I’m thinking this car has the 360-horsepower motor), the 428 featured four-bolt mains for 1968, and has a ton of torque. Motor mounts: Royal Pontiac, located in Royal Oak, Michigan, offered a 428/Royal Bobcat conversion of the 1968 GTO. 3) in 1969, the model with 2-door hardtop coupe body and V-8 6995 cm3 / 426. Jul 1, 2021 · 69 Pontiac 428 HO engine XG code, 4 bolt main 390 HP from factory would have been from a 69 Grand Prix SJ. bh ey bd hq nz yt ig vn ow un