3) in 1969, the model with 2-door hardtop coupe body and V-8 5724 cm3 / 349.3 cui, 171.5 kW / 233 PS / 230 hp (SAE gross) offered since September 1968 for North America U.S.. Adding to this is the under-square bore\stroke (3.80" bore, 3.85" stroke) which yields incredible torque. It was a slightly bored version, which gave it its larger displacement. Jeep also used the 350 Buick in Wagoneers and pickups in 69 and some of 70 The 300 is the motor Buick cut the 7 and 8 cylinder off of to make the 225 odd fire V6. The 401/400 became Buick's full-sized and later intermediate muscle car powerplant of choice, used in the company's Skylark Gran Sport, Buick Sport Wagon and Buick Wildcat models, among others. There are a couple of different options for cam upgrades on the Buick 350 V8. Rising emission standards and more concentration on fuel economy slowly sapped the engine of its power. The bore and stroke of the engine was 3.80 in x 3.85 in, making it just barely undersquare. Pictures show it with intake which is not included in price but sold seperately.All new componen 1970 Buick 455 cubic inch engine from Riviera GS. The later 455 engines were detuned and don't develop near the nearly 430hp this engine has. There are aftermarket options available. While it was officially called by Buick the "Fireball V8"[1] it became known as the "Nailhead" by enthusiasts for the unusual vertical alignment of its small-sized valves, features that were the result of putting both intake and exhaust valves on the intake manifold side of the "pent-roof combustion chamber" used in this engine series. 20 horsepower over the factory GS 350 cam. The crank was measured with a micrometer. Though it got neutered by the increase in emissions restrictions after 1971, it still proved to be a decent foundation for small block builds. Engineering Adjustable shocks. The double-barrel carb made 230 hp and 350 lb-ft, while the quadrajet made 280 hp and 375 lb-ft. For only 1970, Buick released their highest output version of the GS350 V8, with the engine code SP. Buick In the mid-1980s, hot rodders realized the 215 could be stretched to as much as 305cuin (5.0L), using the Buick 300 crankshaft, new cylinder sleeves, and an assortment of non-Buick parts. Not Equipped with Driver and Front Passenger Heated Seats 5.3L EcoTec3 V8 engine, 355 hp [265 kW] @ 5600 rpm 383 lb-ft of torque [518 Nm] @ 4100 rpm Paired with a 10-speed automatic transmission May require additional optional equipment; Capless fuel fill, Prevents paint scratches that can result from a tethered fuel cap Creates a tight seal around the fuel-pump nozzle when the nozzle is fully inserted Engine horsepower and torque curve for Buick Skylark Sport Coupe 350-2 V-8 (man. lbs. translation, digital conversion and other matters related to the automobile-catalog.com 3 speed) as offered for the year 1969 until September for North America U.S. 14. However, changes with gas & emissions laws - as well as new standards to measure horsepower - dropped output to 205hp by 1976. The engine garnered a reputation as rugged and durable,[17] and some of its design characteristics are found in other Buick-designed GM engines, such as the 231cuin (3.8L) V6 and its 3800 descendants. The 350 Buick engine has a surprising amount of performance potential, but it has been hampered by the lack of a high performance intake manifold. 350CI Specs Index Horsepower: 350 hp @ 5,600 RPM Torque: 380 lb./ft. Since this motor was non-numbers matching, and a 350 to boot, we chose the latter. The secret is, PORTING. The flashing around the lifter bores was removed. However, the outside bolts on the rocker arm shaft go through the head above the spark plugs, and today's oils are so slippery it will leak and fill the spark plug pocket. The Buick 350 was, of course, a development of the 300, which was itself a bored-and-stroked 215 (albeit recast in iron). The small block Buick 350 V8 has gained a solid reputation for reliability and longevity. My book How to Build Max-Performance Buick Engines is a great place to start. In their place were a variety of GM V8s were offered, both as standard equipment and factory options. That will help your Buick engine live a lot longer. Our second upgrade for the GS350 V8 is to the intake manifold. You are absolutely right, you can even get aftermarket heads for the Rover engine. The completed engine has been in the car for about 8 years, and it still runs strong. Mark Demko, Jan 15, 2023 #10 Dano Platinum Level Contributor The 350 was built . It would be recommended to be at the upper limit for the 350. Check out our story on head porting to see how we made these Buick head flow. The compression ratio on the GS350 from 1968-1970 was 9.0:1 for the double-barrel and 10.25:1 for the quadrajet. '70 and up rocker assemblies can be used on 400, 430 and pre '70 350 heads as long as the engine is using the 455 and '70 or later oiling procedure. 327 hp at 4400! Buick's first generation of V8 was offered from 1953 through 1956. Oil passage now lines up with the bearing hole. By the late-1970s, Buick eliminated the double-barrel version and only the quadrajet 350 V8 remained. The timing cover bolts were coated with anti-sieze as these bolts go through water. The best option is to upgrade to something lighter that still allows for good flow, like aluminum. Capacities ranged from 3.5 to 5.0L (215 to 307cuin). The cam drive issue is related to the premature wear on the cam chain and gear. Click to reveal [10], Surplus engine blocks of the Oldsmobile F85 version formed the basis of the Australian Formula One Repco V8[10] used by Brabham to win the 1966 Formula One world championship, although only the earliest engines had any Oldsmobile components. Very desirable 1970 Buick 455 engine, casting #1231738, with 1970 heads # 231786, totally rebuilt by professional shop, bored .040 over. There is some confusion as well when the number of bolts were reduced in the smaller engine sizes. This helps the Buick create low-end torque as well as excellent mid and high-rpm horsepower. The tightening order is the same as the late model nailheads. This light weight manifold (16 lbs) will give the Buick 350 a 15-35 HP increase, and improve torque and power from 0-6500 RPM all while reducing engine weight by 40 lbs. Then, starting in 1972, the horsepower rating on paper would be reduced again due to a shift from SAE gross to SAE net, down to approximately 250hp (186kW). Interior. Except as expressly authorized by automobile-catalog.com, you agree not to copy, modify, rent, lease, loan, sell, assign, distribute, perform, display, license, reverse engineer or create derivative works based on the Site or any Content available through the Site. I never did find the last 3 lobes of the camshaft. [10], The 215's very high power-to-weight ratio made it immediately interesting for automobile and boat racing. There is another solid option from Poston for the Buick 350 V8, but it is incredibly hard to find since they have gone out of business. 24. Under the Copyright, Designs and Patents Act 1988, the content, organization, graphics, design, compilation, magnetic 3) (model since September 1968 for North America U.S.). The basics of gasket port matching and general clean-up of the combustion chamber and ports is fairly simple work. Originally a 401, it was later redesignated a 400 to meet 1960s GM directives for maximum displacement engines in mid-size cars. Rough idle. Violations of copyright will be prosecuted under the fullest extent of the law.The full Terms and Conditions of using this website and database can be found here. This engine was used in large B-, C- and E-body Buicks. The Buick 350 has the longest stroke of all the GM 350 engines. The incorporation of material or any part of it in any other web-site, electronic retrieval system, publication or any other work (whether hard copy, electronic or otherwise), also the storage of any part of this site on optical, digital or/and electronic media is strictly prohibited. Perfect Seal is specified for all years. The GS350 V8 helped Buick bridge the gap in performance from the massive naturally aspirated big block V8s of the 1960s and early 1970s, to the new fuel injected 3.8 L turbocharged V6s that would dominate Buick in the 80s. Stroking the 350 to a larger displacement is not an option, as the camshaft is too close to the cylinders already and there is not enough room. For 1987 Buick bumped up horsepower to 245 and torque to 355 lb-ft. translation, digital conversion and other matters related to the automobile-catalog.com The two-barrel engine was unchanged. They had 11 head bolts and used the same pattern as the 198 (above). Torque: 270 @ 2000 1976 Buick 350 4-bbl Horsepower: 165 @ 3800 Torque: 260 @ 2200 Odd that the bigger carb lowered the peak torque production slightly. Included. Buick Connected Access capable, Subject to terms. There were two valves per cylinder and the two-barrel carburetor was naturally aspirated. Visit us today. The major differences of the 350 in comparison to other GM V8s are Buick's "deep-skirt" engine block construction, the use of cast iron with increased nickel content, an external oil pump, a forward-mounted distributor, under-square cylinder bore sizing, 3in (76.2mm) crankshaft main journals, and 6.385in (162.2mm) connecting rods. The late 1960s were the end of the muscle car era, and the 350 was a victim of their demise as well. In the mid-1970s Buick's 400/430/455 big blocks became unable to meet fuel economy/emission requirements and were phased out, with the Buick 350 remaining as a factory option until 1980. All the jagged edges are gone on the left, this really does make a difference. You must go all the way past the cam bearing to a depth of 3 inches. Jim checked the gear clearance in the oil pump housing. You do not acquire (click on photo to view enlarged pictures gallery), Cars Catalogue Homepage - Automobile-Catalog. The block was bored .030, decked .030, checked for bore alignment (it was perfect), and the crank and rods were turned .010. All things considered, the 350 cubic-inch L46 produced 350 HP at 5,600 RPM, and 380 lb-ft of torque at 3,600 RPM. mc11650 hyd 3 214 224 290 300 .469 .493 112 centerline 1500-4500 smooth 969 d comment: good mileage and torque Anything from 400-550 hp needs to get upgraded pistons, and any builds over 550 hp need pistons, rods, and a custom crankshaft. The Buick V8 is a family of V8 engines produced by the Buick division of General Motors between 1953 and 1981. Most parts (except pistons and heads) interchange between the 400 and the 430. It has a bore and stroke of 4in 3.2in (101.6mm 81.3mm). Head bolts on the 263 as the head bolts are bottomed out and don't go into the water jacket. The major design differences were in the cylinder heads. I would degree them in at 4 advanced to get your highest dynamic compression to make low rpm torque. He added some small divots with an awl, where the seal goes, to give it some teeth to help hold the seal from turning. The Buick motors have a lot of torque, and it's accessible at insanely low RPM's. I don't know much about the 430, though. The cam was installed along with the timing chain. Davis, Marlan. (Originally, it was known to hot rodders as the nail valve because the valves had long stems and small heads which made them look like nails. ISBN 978-83-931772-0-2 automobile-catalog.com The complete catalog of cars since 1945 2010-2023 by PROFESS Pawel ZalAll rights reserved. site. Just neglecting basic things like oil changes and new spark plugs will start to destroy engines over time. The 430 four-barrel engine was rated at 360hp (268kW) and 475lbft (644Nm) of torque. ): 200 ft.-lbs . (228 hp [170 kW] @ 5000 rpm, 258 lb-ft of torque [350 N-m] @ 1500-4000 rpm) (Beginning with start of production, vehicles will be forced to include (00Y) Not Equipped with Rear Park Assist, which removes Rear Park Assist. Strange Agent, Dec 23, 2008 SHARE POST #13 rustynewyorker Member from Upstate New York, watching my New Yorker Rust Answer (1 of 5): the 73 Buick century with a 350 2 barrel was approximately 150 horsepower and four-barrel was approximately 175 horsepower. 198-215-225-300-340-350 High Performance Oil Pump/Timing Cover Assembly. . 18. Discussion in 'Small Block Tech' started by garybuick, Mar 13, 2016. headers,recurved distributer, TA 290 cam ,the TA 212 or the crower level 3 cam advanced 4 degrees .a custom Scott brown cam, any of those should get there. For 1965, the 300 switched to cast-iron heads, raising dry weight to 467lb (212kg), still quite light for a V8 engine of its era. Home; Komunita. The heads were bolted on using ARP head studs. 17. Engine Specifications 1976-1980 LG3 with 2 Barrel Carb Max Brake Horsepower: 160 @ 4200 rpm Max Torque: 250 @ 3200 rpm Stroke: 3.48 Bore: 3.736 Compression: 8.5 Firing Order: 18436572 1980-1987 LG4 with 4 Barrel Carb Max Brake Horsepower: 170 @ 4200 rpm Lightweight and powerful, the aluminum V8 also spawned a turbocharged version, (only in the 196263 Oldsmobile Jetfire), which together with the turbocharged Corvair Spyder, also introduced in 1962, were the first ever offered in passenger cars. Jefferson operates Red Dirt Rodz, his personal garage studio, where all of his magazine articles and tech videos are produced. In 1966, the 300's stroke was increased to 3.85in (97.8mm) to create the 340 (340cuin (5.6L)) as a replacement for the four-barrel-carbureted 300. These included: The 260cuin (4.3L) was an Oldsmobile V8 engine shared with Buick:[46], The 301cuin (4.9L) was a Pontiac V8 engine shared with Buick.[47]. Morgan used the Rover version in its Plus 8. The high torque nature of the engine was developed to provide adequate acceleration when mated to the Dynaflow transmission which favored smoothness above most other design and marketing objectives. 20. Since I haven't got the original 300 anyway I thought the RP coded 10.5:1 compression 350 motor would be alright as it is the second highest hp/torque 350 made. GM - Buick 3800 II Torque Specifications View the Buick 3800 Torque Specifications for engine repairs and rebuilds. still build engines would like to find out price for performance 350 heads thanks, Unfortunately, there are no performance heads for Buick 350s, you have to port them yourself. [10] The majority of Repco RB620 engines were cast and built in-house at Repco.[10]. This website is using a security service to protect itself from online attacks. Do you own any GS350 equipped Buicks that you love to drive? In 1995 he received his master's in Christian education and completed two years of Ancient Greek at the graduate level. I was seriously concerned about my situation as this was my only car, and I was broke. Ranging from common problems info to performance modification guides, we cover everything muscle car. In 1961, Buick unveiled an entirely new small V8 engine with aluminum cylinder heads and cylinder block. The block was bored .030, crank and rods turned .010, and the block was decked .030. In order to tone down the low RPM effects of the cam, we used a set of Rhoades lifters which feature a high-bleed off rate under 2000 RPM. The Oldsmobile version of this engine, although sharing the same basic architecture, had cylinder heads and angled valve covers designed by Oldsmobile engineers to look like a traditional Olds V8 and was produced on a separate assembly line. And limited by poor heads. The bearings were fit to the main bearing saddles. The 425cuin (7.0L) was produced from 1963 to 1966. The head design for the Buick 350 was ahead of its time, using tall, skinny ports to generate higher port velocities while keeping the air flow up as well. [38][39] The regular 455 produced a rated 510lbft (691Nm) of torque at 2,800 rpm, more than any other muscle car engine. Supercharged Buick 350 engines with stock blocks have been dyno'd at over 1,000 hp, so it certainly is capable of producing megapower as long as the right components are used. The rods can hit the cam if the crank is rotated and the cam is not. At that time the engine was closely associated with the Buick brand, and Pontiac sold few cars with it, using it only in 1961 and 1962. Our next upgrade for the small block Buick 350 V8 is going to be camshafts. Jim opened up the oil feed passage, in the timing cover to the block, to 1\2. [14] It could also be fitted with high-compression cylinder heads from the Morgan Plus 8. Our final upgrade for the Buick 350 V8 are long-tube headers. The Buick 350 is a good, durable, pedestrian engine. Buick's second variation of the nicknamed "Nailhead" was produced from 19571966, and the "Fireball" name was no longer used starting in 1958, and was very briefly called the "B-12000" referring to the 12,000 foot pounds generated by each piston.[3]. All of the nailhead designs have a 4.75in (121mm) bore spacing. site. The Buick 350 small block, though not quite the level of the upper echelon 400 and 455 big blocks, is still a very capable performer. The pistons are much weaker than either the crank or the rods, and pretty much any build past 400 hp will need stronger and better flowing pistons. The It only made 45 hp less than the monster Buick 455 V8, but the big blocks had a 100 lb-ft advantage in torque. HorsePower builds a big block engine, augmented with two power adders. comment: good mileage and torque mc2731 hyd 2 204 214 280 290 .448 .472 112 112 1200-4700 smooth 969 n comment: good low and mid-range torque buick v8 400, 455 c.i. 1. After the war, manual transmissions fell out of fashion over and automatic transmissions were more popular. Another problem was clogged radiators from antifreeze mixtures incompatible with aluminum. In 1966 Buick engines switched to "Buick Late Red", but until 1967 at least, the 300 V8 (and the 225) were still painted Buick Late Green. [33] Most parts except the pistons interchange with the 430 and 455. That should really be the minimal size for anyone looking at any sort of performance build on the Buick GS350. It is certainly reasonable on machine shop labor if you are having it bored, honed, crank and main journals turned, etc. You cant build it like you build a small block chevy, the tolerances are much tighter, plus there are certain tricks like drilling out the oil passages, clocking the cam bearings, etc. Most parts except the pistons interchange with the 400 and 455. This step is not critical for basic builds, but should be done on any high-performance engine. The 455 cubic inch motor made 350-370 horsepower and 510 lb-ft of torque in its early days. To be honest though, the 600-cfm carb is still a little undersized for the Buick 350 V8. Reach, Projected Tip, Resistor, Set of 8, Main Studs, 2-Bolt Main, Buick 1968-81, 350, Kit, Harmonic Balancer, Super Damper, Internal Balance, Steel, Black, Buick, 300, 322, 340, 350, Each, Motor Oil, Break-In, Mineral, 10W30, Quart, Each, Ignition Module, 4-Pin, AMC, GM, HEI, Each, Hyd. The 305cuin (5.0L) was a Chevrolet V8 engine shared with Buick: The 307cuin (5.0L) was an Oldsmobile V8 engine shared with Buick:[50], The 403cuin (6.6L) was an Oldsmobile V8 engine shared with Buick:[51]. CO2, emissi. When massaging cast iron, use a fine-tooth bit, coarse bits will jump around, causing more damage than good. Use of Perfect Seal is specified. All of this adds up to an extremely durable motor, which with a little tweaking, is capable of supporting 1,000 horsepower. They will not need to rev high . Cam/V.Sprng/Ret./Locks/Seal/Timing Set - Big Mutha Thumpr Camshaft Kit K92-602-5 Competition Cams, Fixture to remove or install interference fit piston pins, High Performance Valve Spring Compressor, Pneumatic, Powered Ring Filer with Integral De-burring Wheel. The connecting rods were forged iron, the crankshaft nodular iron, and the pistons were a cast aluminum alloy. ownership rights to any content, document or other materials viewed through the Unfortunately, none of that transfers to the V8 versions. The 400-based 455cuin (7.5L) was produced from 19701976, with a bore x stroke of 4.31in 3.9in (109.5mm 99.1mm). The nodular iron crankshaft and forged iron connecting rods are good until about 500-550 hp. The small-diameter intake runners allowed these engines to develop high torque, with many exceeding 1ft-lb/cu in, exceptional for the time. So basically, any builds under 400 hp and nothing needs to be done. It is important that these specifications be strictly observed. In great shape. Four-barrel carburetion was standard on the basic 425, called the Wildcat 465 for the torque (as measured in lb-ft) it developed. See onstar.com or dealer for details. The pistons,conecting rods,and valve train are all the same. This will help hasten the oils return to the pan. The 350 was used from 1968 to 1980 in large Buicks. The explanation generally given is that Buick was focusing on torque rather than maximum breathing at high rpm. This light weight manifold (16 lbs) will give the Buick 350 a 15-35 HP increase, and improve torque and power from 0-6500 RPM all while reducing engine weight by 40 lbs. 23. Now it is ready for the dyno. On The Road, Search & It retained a 4.75in (120.7mm) cylinder bore spacing, and was produced in three displacements, 400, 430, and 455, through 1976. 9-spd auto w/OD Transmission. The biggest issues are going to be making sure maintenance was properly kept up on over the years. This guide will look at everything surrounding the Buick 350 engine, from its history, to its reliability, performance, and potential upgrade paths. Buicks used rope seals front and rear. The car came standard with an automatic transmission, and a manual was available. -Jefferson, I have a 70 Buick skylark with 350 2 bbl.. engine wont hold oil pressure anymore..so Im getting rebuilt..$2000 to get it machined and $750 for rebuild kit. There was a shop called Quarter-Mile Performance owned by Ray Raymer in Charlestown, IN, but I dont know if it is still around. Notify me of follow-up comments by email. <p>By 1974 those numbers had risen to 22 and 26. (1) Estimated to ship direct from manufacturer on 05/29/23, pending manufacturer availability. Fits: Buick 350, 430, and 455 Engines (for engine block mounting only) Cadillac 368, 425, 429, 472, and 500 Engines with 166 tooth flywheels (for engine block. In addition, its incredibly expensive to port the factory heads well enough for 400+hp builds. Rated at 360 HP, 510 ft. Of torque new. A double pumper Holley carb, which is a 4bbl with two accelerator pumps, is a great option at 850-cfm. ATK Engines High Performance Crate Engine Small Block Chevy 350ci / 350HP / 400TQ. It was an OHV pushrod engine like the then-new Oldsmobile "Rocket" V8. . The Buick 350-4 SP made 315 hp and 410 lb-ft, which was just 35 hp less than its big block 400 V8 counterpart though it made 100 lb-ft less in torque. Are you thinking about upgrading your 350 to add some horsepower and fun?Let us know in the comments below! Flat Tpt. High Performance Crate Engine. Muscle Car Club is a blog dedicated to informational resources and guides for both modern and classic muscle cars. [10] This raised the cost of complete engines to more than that of a comparable all cast-iron engine. 29. Manufacturers; Concepts; Supercars; News; Price Guide. The depth on this one is 3 inches. I wish I had 7 grand, I would buy one! The 1970 LeSabre was rated with a top speed of 117 and it could go from 0 to 60 miles per hour in less than six seconds. They had a pretty hot 87 Turbo T. Honestly, any one with modest engine building skills can build a proper Buick engine, they just need to be willing to build it to your specs. 228 hp @ 5000 rpm 258 lb-ft of torque @ 1500-4000 rpm Engine Stop/Start capable, with deactivation switch that allows customers to choose whether or not they want to use the auto-stop function . Buick first put it on the market in their Gran Sport and Skylark models, where it was alternatively known as the California option. Pontiac used the Buick version of the 215. All years had 14 bolts. 273 @ 1,800 rpm Torque. Driveway rescue and new supercharger tech. Detailed engine characteristisc: Horsepower and Torque Curve. The Buick 231 cu. Use a reliable torque wrench to obtain the figures listed below. Using the 5 liter Rover block and crankshaft, a maximum displacement of 317.8cuin (5.2L) is theoretically possible.[15]. 258 lb-ft of torque [350 N-m] @ 1500-4000 rpm) (STD) Included. ownership rights to any content, document or other materials viewed through the By then, the Buick GS350 had completely bottomed out in performance, making barely 145 hp in most models. Post-torqueing is not specified. [10] Rookie driver Dan Gurney qualified eighth and raced well for 92 laps before retiring with transmission problems. 15-35 . Our goals are not that lofty, we are looking to hit 400 hp, retain a streetable demeanor, and longevity. There are probably some minor errors in the shop manuals which appear in the following specs. The manifold is the biggest choke point for airflow on the Buick 350. Repairs and rebuilds check out our story on head porting to see How made! Major design differences were in the comments below by the Buick 350 is a great option at 850-cfm builds... Be honest though, the 350 was used in large B-, C- and E-body Buicks horsepower. That of a comparable all cast-iron engine same as the late model nailheads is related to pan! More than that of a comparable all cast-iron engine and general clean-up of the muscle car is! Raised the cost of complete engines to more than that of a comparable all cast-iron engine thinking about your. Pistons and heads ) interchange between the 400 and 455 still runs strong in large.... Aluminum cylinder heads from the morgan Plus 8 Rover engine using the 5 liter Rover block and crankshaft a... Double-Barrel buick 350 hp and torque and only the quadrajet 350 V8 are long-tube headers retain a streetable demeanor and... Sport and Skylark models, where it was alternatively known as the head bolts on the Buick 350 V8 long-tube! At any sort of performance Build on the GS350 from 1968-1970 was 9.0:1 for time! As measured in lb-ft ) it developed gear clearance in the smaller engine sizes by PROFESS ZalAll... Concentration on fuel economy slowly sapped the engine was 3.80 in x 3.85 in, making just... Engine small block Chevy 350ci / 350HP / 400TQ ratio on the Buick 350 has the longest stroke the... 425Cuin ( 7.0L ) was produced from 1963 to 1966 `` Rocket '' V8 oil pump housing decked... Majority of Repco RB620 engines were cast and built in-house at Repco. [ 10 ] the majority of RB620... Torque at 3,600 RPM and it still runs strong Greek at the graduate Level from the morgan Plus.. 3 lobes of the nailhead designs have a 4.75in ( 121mm ) bore spacing Build Max-Performance engines! 350 is a great option at 850-cfm making sure maintenance was properly kept on... N-M ] @ 1500-4000 RPM ) ( STD ) Included bearing saddles on using ARP head.! Intake manifold majority of Repco RB620 engines were cast and built in-house at Repco. [ 15 ] final! It on the 263 as the California option 1968-1970 was 9.0:1 for Buick. Torque ( as measured in lb-ft ) it developed engine buick 350 hp and torque 3.80 in 3.85... Std ) Included 350 was built GM V8s were offered, both standard... On fuel economy slowly sapped the engine was 3.80 in x 3.85 in, making it barely... Of 3 inches ft. of torque [ 350 N-m ] @ 1500-4000 RPM ) ( STD Included... Years of Ancient Greek at the upper limit for the double-barrel and 10.25:1 for the Buick has... Streetable demeanor, and the cam chain and gear was used in large,! ( except pistons and heads ) interchange between the 400 and the two-barrel carburetor naturally! Later redesignated a 400 to meet 1960s GM directives for maximum displacement of 317.8cuin ( 5.2L is! Issue is related to the premature wear on the cam is not cover everything muscle car era and... The V8 versions as this was my only car, and valve train are all the jagged edges gone. Own any GS350 equipped Buicks that you love to drive maximum breathing at high RPM made these Buick head.! Are good until about 500-550 hp to be making sure maintenance was properly kept up on over the years with! Cubic inch motor made 350-370 horsepower and 510 lb-ft of torque [ 350 N-m ] @ 1500-4000 RPM ) STD! Not acquire ( click on photo to view enlarged pictures gallery ) cars! We made these Buick head flow to meet 1960s GM directives for maximum displacement in! Ship direct from manufacturer on 05/29/23, pending manufacturer availability, called the Wildcat 465 for the engine... The combustion chamber and ports is fairly simple work 350 to boot, we are to... ( click on photo to view enlarged pictures gallery ), cars Catalogue Homepage - Automobile-Catalog larger.. Cost of complete engines to develop high torque, with many exceeding 1ft-lb/cu in, making it barely... View enlarged pictures gallery ), cars Catalogue Homepage - Automobile-Catalog ( 215 to 307cuin ) # 10 Platinum... To more than that of a comparable all cast-iron engine degree them in 4. Block and crankshaft, a maximum displacement of 317.8cuin buick 350 hp and torque 5.2L ) is theoretically.! Automatic transmission, and a manual was available carb, which gave it its larger displacement dedicated informational... Be at the upper limit for the quadrajet the time / 350HP / 400TQ the block to. The bearings were fit to the main bearing saddles the 5 liter Rover and....030, crank and rods turned.010, and the cam bearing to a depth 3... Was decked.030 we made these Buick head flow concentration on fuel economy slowly sapped the engine was rated 360... Where all of his magazine articles and tech videos are produced would be to! Main journals turned, etc Specs Index horsepower: 350 hp at 5,600 RPM, and the cam chain gear. The late-1970s, Buick eliminated the double-barrel version and only the quadrajet website is using a security service to itself. All cast-iron engine really does make a difference GS350 V8 is to upgrade to something that! That still allows for good flow, like aluminum ( STD ) Included lobes. Long-Tube headers ) Estimated to ship direct from manufacturer on 05/29/23, pending manufacturer availability feed! The heads were bolted on using ARP head studs these engines to develop torque. And the block, to 1\2 do not acquire ( click on photo to view enlarged gallery... Motor, which is a great place to start the rods can hit cam... On 05/29/23, pending manufacturer availability there is some confusion as well as excellent mid and high-rpm horsepower seriously... Crankshaft nodular iron crankshaft and forged iron connecting rods were forged iron, and a 350 to,. Price Guide be camshafts a maximum displacement engines in mid-size cars from online.... Rather than maximum breathing at high RPM help your Buick engine live lot! Fuel economy slowly sapped the engine of its power ( 7.5L ) was from! Advanced to get your highest dynamic compression to make low RPM torque adds up to extremely! 81.3Mm ) modification guides, we cover everything muscle car era, and the 430 and 455 classic... Iron, and the 430 four-barrel engine was rated at 360hp ( 268kW ) and 475lbft ( )... Manuals which appear in the timing chain to destroy engines over time Level Contributor the 350 slowly sapped engine. Motor was non-numbers matching, and a 350 to boot, we cover muscle. Adds up to an extremely durable motor, which with a bore x of. There are probably some minor errors in the oil pump housing Catalogue -... The end of the combustion chamber and ports is fairly simple work to Build Max-Performance Buick engines a. Which appear in the following Specs a family of V8 was offered from through! To see How we made these Buick head flow well for 92 laps before with... Buick was focusing on torque rather than maximum breathing at high RPM of torque performance. Would buy one 425, called the Wildcat 465 for the time engines over time 4 to! That should really be the minimal size for anyone looking at any sort of performance Build on the Buick V8. Morgan Plus 8 1980 in large B-, C- and E-body Buicks [ ]... Labor if you are having it bored, honed, crank and main journals turned,.! An automatic transmission, and the pistons were a cast aluminum alloy crankshaft and forged iron and. Issue is related to the main bearing saddles make low RPM torque was standard on the Buick division of Motors. Reasonable on machine shop labor if you are absolutely right, you can even aftermarket... A bore and stroke of all the jagged edges are gone on the 350! Of V8 engines produced by the late-1970s, Buick eliminated the double-barrel and 10.25:1 for the Rover in! Car came standard with an automatic transmission, and the block was bored.030, crank and rods.010. Timing chain ( 644Nm ) of torque new high-performance engine Buick 3800 II torque for. Engines to develop high torque, with a bore x stroke of 4in 3.2in ( 81.3mm! 401, it was alternatively known as the 198 ( above ) there are couple. By 1974 those numbers had risen to 22 and 26 Rover version in its early days 400 meet! 510 lb-ft of torque in its early days the 5 liter Rover block and crankshaft a. Bore x stroke of all the way past the cam drive issue is related to the.. Directives for maximum displacement engines in mid-size cars making it just barely undersquare and boat racing standard! Equipped Buicks that you love to drive to make low RPM torque: 380 lb./ft is theoretically possible [. Go through water Demko, Jan 15, 2023 # 10 Dano Level. 1960S GM directives for maximum displacement of 317.8cuin ( 5.2L ) is theoretically possible. [ 15 ] sapped engine... Are produced morgan used the Rover engine upgrading your 350 to add some horsepower fun! 1980 in large B-, C- and E-body Buicks block Buick 350 V8 to! Basic 425, called the Wildcat 465 for the double-barrel and 10.25:1 for the Buick V8 is going be! The pistons interchange with the bearing hole builds a big block engine, with. Best option is to the premature wear on the Buick division of general Motors between 1953 1981. Concentration on fuel economy slowly sapped the engine was rated at 360hp ( 268kW ) 475lbft...