At the time this work was done, nobody was really working these heads. It made nearly 350 HP @ 5200 RPM, and nearly 400 ft. lbs. I wish I had 7 grand, I would buy one! All rights reserved. https://streettechmag.com/2015/03/23/porting/. This will prevent attainment of the proper torque and will require replacement of the damaged part. The LT-1, in 1994, got 17 mpg in the city and 25 to 27 mpg on the highway, depending on transmission selection. 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. Originally a 401, it was later redesignated a 400 to meet 1960s GM directives for maximum displacement engines in mid-size cars. The nodular iron crankshaft and forged iron connecting rods are good until about 500-550 hp. 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. '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. The first version replaced the Buick straight-eight. 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. . When massaging cast iron, use a fine-tooth bit, coarse bits will jump around, causing more damage than good. In 1961, Buick unveiled an entirely new small V8 engine with aluminum cylinder heads and cylinder block. The biggest culprits are tiny oil feed holes, the main bearing oil hole not being aligned, and poor cam oiling. Ranging from common problems info to performance modification guides, we cover everything muscle car. The automobile-catalog.com website is only for the on-line view using the internet browser. 220lbft (298Nm) of torque was produced at 2,400rpm with a Rochester 2GC (DualJet) two-barrel carburetor and 8.8:1 compression ratio. 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. 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. This meant that Buick heads would fit on Oldsmobile blocks, but not vice versa. It would be recommended to be at the upper limit for the 350. (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. It also meant the detuning of both the double-barrel and quadrajet versions of the Buick 350, too. The Wildcat 445, with a single four-barrel carburetor, was the standard engine in the Invicta, 1959-1966 Electra, 19621966 Buick Wildcat, 1963 Riviera, and 1965 Riviera (the 1964 and 1966 Riviera models used the 425 with a single four-barrel carburetor, labeled Wildcat 465, as standard equipment). Post-torqueing is not specified. Jordan holds a Bachelor of Arts in journalism. Shop 350 Buick Small Block V8 parts and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. Our suggestion is once again from TA Performance, its their 350 Stage 1 Intake Manifold. ISBN 978-83-931772-0-2 automobile-catalog.com The complete catalog of cars since 1945 2010-2023 by PROFESS Pawel ZalAll rights reserved. The Buick 231 cu. "Kelly", Jr. Baechtel, John. Depending on carburetion or use of turbocharger. 23. 3) (model since September 1968 for North America U.S.). His work has been featured in Car Craft, Hot Rod, Rod & Custom, Truckin, Mopar Muscle, and many more. The most obvious way to tell if the oil pump is going bad is a lack of oil pressure. The high-volume pump gears were installed in the timing cover. . Top: Used on '71 up 455 and 350. I am not aware of any, but that doesnt mean they are not out there. 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. This engine produced 275 hp and 325 foot-pounds of torque. You can follow Jefferson on Facebook (Jefferson Bryant), Twitter (71Buickfreak), and YouTube (RedDirtRodz). per cubic inch, a very respectable output indeed. 3) Detailed Accelerations, Performance Review, 1969 Buick Skylark Sport Coupe 350-2 V-8 (man. 2.0L I-4 Engine. In 1965 the 300 shows 10 bolts and increases the torque to 70-75. GENERAL SPECIFICATIONS - 2500-6400rpm - Incl. It would be recommended to be at the upper limit for the 350. Jim drills these to 5/16 to match the drilled block passage. Then just a month after buying the car, while cruising to Oklahoma City, on a date with my future wife no less, the stock Buick 350 lets loose at 70 MPH. All of this adds up to an extremely durable motor, which with a little tweaking, is capable of supporting 1,000 horsepower. This would be where ever the bolt hole in the block goes through to the water jacket. 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. Been kept indoors. Though it was similar in displacement to other GM small block V8s; like the Chevy 350, Pontiac 350, or Oldsmobile 350; the Buick 350 V8 had a completely different design. Our second upgrade for the GS350 V8 is to the intake manifold. Unfortunately, the only solution is to replace it and hope it does not happen again. Once assembled, the actual 350 was put through its paces on the Land and Sea engine dyno, and those results came in at 396 hp at 5300 RPMs; 414 ft. lbs at 4200 RPMs. site (including ProfessCars and automobile-catalog.com) are protected under applicable copyrights, trademarks and other For muscle cars, the rebuild process offers 2 options, go stock and keep it all original or pump up the power and add some ponies to the mix. Sizing should be at least 2.5-in for builds between 350-500 hp, and anything greater than 500-hp will likely need 3-in tubing. This step is not critical for basic builds, but should be done on any high-performance engine. 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. See onstar.com or dealer for details. At the time, the engine was the lightest mass-production V8 in the world, with a dry weight of only 318lb (144kg). alleycat. . 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. [citation needed]. The Buick 350 has the longest stroke of all the GM 350 engines. With so many different options, its important to make sure you are choosing the right cams for your build. Buick first put it on the market in their Gran Sport and Skylark models, where it was alternatively known as the California option. 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). Buick's first generation of V8 was offered from 1953 through 1956. Lets start by taking a look at its late 1960s origins. The rebuild kit I would assume has all the gaskets, rings, bearings, oil pump, etc? A radius was cut into the oil feed passage, in the timing cover, using a ball end mill. Needless to say, the block was history. 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. Pontiac used the Buick version of the 215. Many were shared among other divisions, but each design is most-closely associated with its own division: GM later standardized on the later generations of the Chevrolet design: 401 cu in "Nailhead" in a 1964 Buick Wildcat. Oil passage now lines up with the bearing hole. No more rope. 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. Every part used in the build was an off-the-shelf part, no custom made unobtainium materials here. Bore spacings for all variants of the SBB are 4.24in (107.7mm). 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. Our suggestion for 350 V8 heads are the TA Performance Stage 1 Street Eliminator Cylinder Heads. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The all-aluminum V8 engine was dropped after the 1963 model year, but was replaced with a very similar cast-iron block, aluminum head version for one year, and then in all-iron versions. TA Performance and Poston are two of the top options, and they each have a wide variety of cams available. This is easier. By 1974 those numbers had risen to 22 and 26. 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. Engine horsepower and torque curve for Buick Skylark Sport Coupe 350-2 V-8 (man. The There are aftermarket options available. Crankshaft bearing caps to cylinder block, Flywheel to crankshaft (both auto and manual), Fuel pump eccentric to timing chain sprocket to camshaft, Rocker arm shaft bracket to cylinder head, Delcotron adjusting bracket to cylinder head, Delcotron mounting bracket thru delcotron to cylinder head at pivot location, Pearlitic malleable iron forged - SAE-1053 steel, SAE 1041 steel - Aluminized Face and Chrome Flashed Stem, 21-2 Aluminized Face and Chrome Flashed Stem, *All measurements are in inches unless otherwise specified. Torque was 50-55 for the 61 and 62 models. The neoprene seal was installed offset about a , so the seal wouldnt leak in the middle. All years had 14 bolts. All done, the short block is complete. There was a Buick service letter put out many years later which raised the values on the earliest years of the 215. all rights reserved StreetTech Magazine - site developed by ampnetmedia. Manufacturers; Concepts; Supercars; News; Price Guide. This helps keep the oil in the pan, from splashing the crank, which reduces horsepower and whips the oil into foam. A very thin layer of silicone sealant was used on the timing cover gasket. TA Performance makes a great 4 bbl conversion kit that comes with their stage 1 intake manifold and a 600-cfm edelbrock carb. 8. In addition, its incredibly expensive to port the factory heads well enough for 400+hp builds. In 1966 torque goes to 65-80 and in 1967 post torqueing is specified. ABS and driveline Traction control. When bolted on, this manifold will actually increase the air flow by 5% at .300" valve lift and 2.3% at .600" valve lift over the head alone. The information below is divided into the following sections: Package contents, component information, 350 HO engine specifications, additional parts that you may need to purchase, torque specifications, and a service parts list. [10] This raised the cost of complete engines to more than that of a comparable all cast-iron engine. Feed passage, in the middle are good until about 500-550 hp 325! Variants of the Buick 350, too of oil pressure the seal wouldnt leak the... Cost of complete engines to more than that of a comparable all engine. 62 models, Rod & Custom, Truckin, Mopar muscle, and anything greater than 500-hp will need... To tell if the oil feed holes, the main bearing oil hole not aligned... 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Important to make sure you are choosing the right cams for your build News ; Price Guide it not...