As it turns out, the 350 could have been rebuilt without boring or turning the block as it was in really good shape, but in order to get the tight clearances for high-performance use, the machine work was performed. Buick, like most of its competitors, continued to expand their durable V8 engine to larger displacements, such as the 4.125 by 3.4 inches (104.8mm 86.4mm) (bore by stroke) 364cuin (6.0L). All are naturally aspirated OHV pushrod engines, except for an optional turbocharged version of the short-lived 215 used in the 1962-63 Oldsmobile Jetfire. The oiling system is the weakest point, and you need to make sure the pump is shimmed properly. Buick introduced the 350 V8 (also known as GS350) in 1968 as the successor to the GS340 V8. @ 3,600 RPM Compression Ratio: 11.0:1 Displacement: 350 cubic-inches (5.7 L) Cylinder Bore: 4.00 inches (101.6 mm) Stroke: 3.46 inches (87.88 mm) The sixth bolt was added to the intake manifold side of the head, one extra bolt for each cylinder, intended to alleviate a head-warping problem on high-compression versions. If the clearance is .007 or bigger, the cover is junk. It does a great job of improving power everywhere in the power band, and is built to fit with many different carburetors. The internal components for the engine were sourced from Poston Buick, a Buick-only specialty shop. Color: Moonstone Gray Metallic- Transmission: Automatic - VIN: LRBFZRR44PD029979. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Ranging from common problems info to performance modification guides, we cover everything muscle car. 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 . This essentially creates a dual-cam effect, where at low RPM, the cam is more subdued, but once the engine hits 2000 RPM, the lifters stay pumped up, allowing the cam to do what it does. The compression ratio -- or the amount of compression on the air and fuel mixture before it is ignited -- was 9 to 1 in 1970 and 8.5 to 1 by 1975. 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. Detailed engine characteristics. The factory 350 heads are heavy cast iron and flow very poorly even with the taller ports. Faulkner Buick GMC Harrisburg has this New White 2023 GMC Acadia available for you to test drive. The 350 was used from 1968 to 1980 in large Buicks. This helps keep the oil in the pan, from splashing the crank, which reduces horsepower and whips the oil into foam. Later Rover versions of the aluminum block and subsequent Buick iron small-block 300s with aluminum, then iron heads, 34 (0 and 350 with iron heads) went to a four-bolt-per-cylinder pattern.[8]. 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. But when it comes down to v8 vs v6 the 350 Buick what's a torque monster compared to the current Short stroke v6 as we have today. Will rev to 6000 RPM. These specifications are for clean and lightly lubricated threads only. Main bearing caps on 327 engines should be torque in two steps to between 60 and 70 lb-ft, while 350 engines should be taken to 75. I would degree them in at 4 advanced to get your highest dynamic compression to make low rpm torque. Mounted on a trolley, Buick 425s were also used as starter motors for the SR-71 Blackbird supersonic jet.[4]. 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. This will prevent attainment of the proper torque and will require replacement of the damaged part. In 1970 the LeSabre had 260 horsepower and by 1979 it was down to 155. How to Reset the Maintenance Light in a New car petrol engines image by Christopher Dodge from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media, Automobile-Catalog.com: 1979 Buick LeSabre, Automobile-Catalog.com: 1974 Buick LeSabre, Automobile-Catalog.com: 1970 Buick LeSabre. The cam was installed along with the timing chain. The block was bored .030, decked .030, checked for bore alignment (it was perfect), and the crank and rods were turned .010. Bore spacings for all variants of the SBB are 4.24in (107.7mm). Unfortunately, the only solution is to replace it and hope it does not happen again. Manifold Features. Coded "MW", these parts were delivered in the car's trunk for dealer installation. In 1966 torque goes to 65-80 and in 1967 post torqueing is specified. IN ADDITION TO ITS EXTRA WIDTH, THE BUICK 350 INTAKE MANIFOLD HAS SOME SERIOUS WEIGHT TO IT, TIPPING THE SCALES AT 67 POUNDS. 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]. 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 Buick V8 is a family of V8 engines produced by the Buick division of General Motors between 1953 and 1981. Post-tightening is specified for most engines, where the bolts are to be torqued again to the final value after the engine is up to full operating temperature. There is a huge amount of support for the 215, principally because of its lengthy use by Rover, spanning a period of 38 years (1967-2005). Included. 350CI Specs Index Horsepower: 350 hp @ 5,600 RPM Torque: 380 lb./ft. In addition, its incredibly expensive to port the factory heads well enough for 400+hp builds. Among the differences between the Oldsmobile and Buick versions was weight, being somewhat heavier, at 350lb (160kg). The 1970 standard double and four-barrel carb non-SP versions still made a respectable 260 hp/360 lb-ft and 285 hp/375 lb-ft. As we discussed above, horsepower dropped precipitously starting in 1971 and never recovered. Rear has Moroso "No Hop Bars", Boxed lower control arms, air bags (both sides) and factory sway bar. It retained the aluminum cylinder heads, intake manifold, and accessories of the 215 for a dry weight of 405lb (184kg). Does that sound reasonable? It is certainly reasonable on machine shop labor if you are having it bored, honed, crank and main journals turned, etc. The hole depth is 4 inches. There was a Buick service letter put out many years later which raised the values on the earliest years of the 215. [10] The majority of Repco RB620 engines were cast and built in-house at Repco.[10]. Run with a stock cam and two-barrel Rochester carb, the mild 350 produced 246 hp and 364 lb-ft of torque. The long-lived rumors of bad oiling systems (unfortunately true, but easily rectified) and relative scarcity (built from 1968 to 1980) is harder to find than an SBC motor, dont let that stop you, though, as these motors have quite a bit going for them. This website is using a security service to protect itself from online attacks. Our next upgrade for the small block Buick 350 V8 is going to be camshafts. The only thing saving my right foot was a bellhousing bolt that didnt shear off when the back of the cam hit the bellhousing, busting the entire ear, and bending the bolt. 26. '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. It was only produced through 1967, being replaced by the new small block 350cuin (5.7L) in 1968. Small Block Chevy 350 ci. At the time, the engine was the lightest mass-production V8 in the world, with a dry weight of only 318lb (144kg). So it was up to the 350 to hold down the fort, which it did admirably for years. Some porting on heads would not hurt.. Getting piston closer to zero deck is a good idea. [10], The 215's very high power-to-weight ratio made it immediately interesting for automobile and boat racing. lbs. At the time this work was done, nobody was really working these heads. Boddy, William. -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. The Dont go too large with your exhaust, as that can actually hamper performance. 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. GM - Buick 3800 II Torque Specifications View the Buick 3800 Torque Specifications for engine repairs and rebuilds. All of the nailhead designs have a 4.75in (121mm) bore spacing. It is considered incredibly stout and is not known for any large scale issues. The engine was discontinued for the 1980 model year. Emissions restrictions led to its quick decline a few years later, where it languished until 1980. There are a couple of different options for cam upgrades on the Buick 350 V8. These are the caps on the crankshaft. ). Very desirable 1970 Buick 455 engine, casting #1231738, with 1970 heads # 231786, totally rebuilt by professional shop, bored .040 over.All new components in engine. Or, if you have a double-barrel version, moving up to a four-barrel, like the quadrajet carb, is a great option. The Buick 350 does not require a torque plate for boring as all of the head bolts are blind, meaning they do not hit the water jackets, so the cylinder does not tweak when the head is bolted down. The heads were bolted on using ARP head studs. . 273 @ 1,800 rpm Torque. Measuring 28in (71cm) long, 26in (66cm) wide, and 27in (69cm) high (same as the small-block Chevy),[7] it became standard equipment in the 1961 Buick Special. Perfect for Buick muscle car project. Repco-Brabham also based their F1-championship-winning V8 (SOHC per bank) on the Oldsmobile 215 turbo block, and subsequently developed it into a 5-litre quad-cam 32-valve sports car engine. Manufacturers; Concepts; Supercars; News; Price Guide. all rights reserved StreetTech Magazine - site developed by ampnetmedia. We sent the block to Jim Burek at Performance Automotive Engines in El Paso, TX. The largest-displacement version of the Nailhead, it began as an option on the 1963 Riviera, and was later available on the Wildcat and Electra models. Buick's 350 was different than the rest of GM's 350 engines. It was also used on some Jeep Wranglers and Wagoneers during the years it was used in the GM lineup. Jordan holds a Bachelor of Arts in journalism. Even more porting can be done to increase cfm, too. ( 184kg ) to 65-80 and in 1967 post torqueing is specified block 350cuin 5.7L... It and hope it does a great job of improving power everywhere in the lineup! 1967, being replaced by the New small block Buick 350 V8 is to. Heads, intake manifold, and you need to make sure the is... At the time this work was done, nobody was really working heads. 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