The engine block had 4.84-inch (123mm) bore centers, two-bolt main bearing caps, a "side oiling" lubrication system (the main oil gallery located low on the driver's side of the crankcase), with full-flow oil filter, and interchangeable cylinder heads. For those looking to go further, the 454 cubic inch motor can make well beyond 1,000hp if youre willing to drop some serious money. The 1973 LS-4 produced 275hp (205kW) and 468lbft (635Nm), with 5hp (4kW) and 10lbft (14Nm) gone the following year. Learn how and when to remove these template messages, Learn how and when to remove this template message, "1988 Lola T - Corvette Gr C ex Le Mans 1990 with 10,5 Liter Engine | Classic Driver Market", "The Sickest Corvette Race Cars From Motorsports History", "2nd Gen Camaro Component Weight Database", "How Much Does a Small Block Chevy Engine Weight? Reliable 87-octane, big horsepower has been the Holy Grail for both enthusiasts and engine builders for some time now, with many choosing forced-induction to achieve that goal. Anyway, the point is that the Chevy 454 has been a prominent engine since its intro in 1970. Mobil 1 is now The Official Motor Oil of Chevrolet Performance. A 409hp (305kW) version of this engine was also available, developing 1hp per cubic inch with a dual four-barrel aluminium intake manifold and two Carter AFB carburetors. The ZL1 engine also featured a lightweight aluminum water pump, a camshaft that was slightly "hotter" than the L88's, and a specially tuned aluminum intake manifold. The Packard rumor was just that, a rumor. Used Chevy 454 Engine For Sale. Darrell Ingham/Getty Images Sport/Getty Images. L71 + aluminium heads; RPO L89 also applied to L78 "375 HP" 396 engine with aluminium head option. The cylinder bore is 4.25-inches (107.95 millimeters), and the stroke is four inches (101.6 millimeters). Backfiring can be frustrating since there are a lot of potential reasons the Chevy big block is backfiring. Bore x stroke were both up from the 348cuin (5.7L) to 4.31in 3.5in (109.5mm 88.9mm). Furthermore, it laid the path for more modern variants of the big-block Chevy engine like the Vortec 8100. There were 3 different variations of the 454 that came onto the drawing board at GM during the 70s; the LS5, the LS6, and the LS7 which . RELATED:Rat-Sized Mouse Motor: Chevrolet's LSX 454 Crate Engine. It was primarily used in C/K 2500 and 3500 trucks as well as the Suburban 2500. With age and mileage the gaskets wear down and begin leaking. Step 1. This page was last edited on 16 April 2023, at 23:08. It had a bore and a stroke of 3.935in 3.76in (99.9mm 95.5mm). The 427 is part of the Mark IV engine family, alongside the 366, 396, 402, and 454. Consequently, the engines offered very similar performance and resulted in a car whose performance was described by one automotive journalist as "the ultimate in sheer neck-snapping overkill". 1965: 325hp (242kW)/375hp (280kW)/425hp (317kW), 1966: 325hp (242kW)/360hp (268kW)/375hp (280kW), 1967: 325hp (242kW)/350hp (261kW)/375hp (280kW), 1968: 325hp (242kW)/350hp (261kW)/375hp (280kW), 1969: 265hp (198kW)(2bbl)/325hp (242kW)/350hp (261kW)/375hp (280kW), 1971: 300hp (224kW) SAE gross; while SAE net was 260hp (194kW) for dual exhaust and 206hp (154kW) for single exhaust, 1972: 240hp (179kW) SAE net for dual exhaust and 210hp (157kW) SAE net for single exhaust, L-34: produced 19669, 10.25:1 compression, Holley (. In addition, a 340hp (254kW) version of the 409 engine was available from 1963 to 1965, with a single 4-barrel cast iron intake mounting a Rochester 4GC square-bore carburetor, and a hydraulic-lifter camshaft. On the back of the casting I looked for a date, and found "0 2 blob 3". Most new 454 engines from this year were released with a seven-year or 100,000-mile warranty, and these engines are . E1973. The downside is the 454 is a very heavy and hot engine so it may not be fun to drive long distances with. Are you ready to rumble? Chevrolet had introduced its popular small block V8 in 1955, but needed something larger to power its medium duty trucks and the heavier cars that were on the drawing board. The Chevy 454 uses a typical old-school V8 design like youd find on small block engines like the Chevy 350 or Chevy 305. However, long before the LS1 was introduced, GM used the LS designation for the family of 454 big-block engines. 575lb or 261kg dressed). The 1970 LS5 came with 360 horsepower, and the 1970 LS6 came with an impressive 450 horsepower. Must be purchased from a participating U.S. dealer or Chevrolet Performance Authorized Reseller. The 454 uses a cast-iron engine block and aluminum cylinder heads and used this construction throughout its entire production run. The 7.4-liter engine uses fuel injection for maximum performance, and gasoline is the fuel of choice for this particular engine. Unlike the popular Chevy 427 that was used in a wide variety of automobiles, the 454 was used only in high performance cars like the Chevy Camaro, Corvette and Chevelle. Introduced in 1970, the 402cuin (6.6L) was a 396cuin (6.5L) bored out by 0.03in (0.76mm). Also the BB weights right at 200 lbs more than the SB chevy. SAE Transactions, Volume 67 (1959), 104-105. When the 454 cubic inch engine appeared in the Chevrolet catalog in 1970, it was intended to rule the streets by building on the same Mark IV design architecture that had defined the 427 cubic in V8 that preceded it. The 1991 Chevy 454 engine design is a high performance V8 engine, making it a powerful truck engine. Mobil 1 is now The Official Motor Oil of Chevrolet Performance. Chevrolet's famous "big-block" 454 V8 was introduced in 1970, and replaced the 427 as the top-dog engine option. Parts and labor warranty when installed by a GM Dealer or qualified installing independent Service Center (ISC) or when sold over the counter and REPAIRED by a GM Dealer or qualifying ISC. In 1970 the LS5 and LS6 454 big-block V8 engines became available to the public in various GM vehicles. [33] A second engine dyno test conducted on a second production line stock (but recently rebuilt and partially blueprinted) ZL1 revealed nearly identical figures for the various "gross" conditions.[34]. The block and heads are cast iron which delivers great strength, but also makes for a nearly 700 pound engine. See gmpartsrebates.com for details, applicable rebate amounts, and rebate form. Julybien Atadero writes from the island of Cebu covering various automotive topics including new sports cars, classic muscles, pickup trucks and SUVs. Here are the trucks and SUVs youll find the 454 in. General Motors 7.0-liter LS7 V8 engine is already considered a legend as the core of the fifth-generation Chevrolet Camaro Z/28. $8,899.00. The L88 version of the 427 is the most desirable variant. The first major update to the Chevrolet 7.4L big block engine came in 1987 with the switch to EFI. Like the L88, the ZL1 required 103 octane (RON) (minimum) fuel, used an unshrouded radiator, and had poor low-speed idle qualities - all of which made the two engines largely unsuitable for street use. This alteration in valve placement resulted in a significant improvement in volumetric efficiency at high RPM and a substantial increase in power output at racing speeds. As its name suggests, the Chevy 454 big block V8 has a 454 cubic inch displacement, with cast iron blocks and heads that offer great strength but result in an engine . LSX 454 Crate Engine | Big Block | Chevy Performance Parts, Emissions Standards Compliance | Chevrolet Performance, Engine Type: LSX-Series Gen-IV Small-Block V-8, Bore x Stroke (in. This engine has a bore and a stroke of 4.56in 4+38in (115.8mm 111.1mm). Also now you can get crate engines based on the SB chevy with 454 ci. Find everything from vital data about your engines capabilities to how to install it into your build. Other upgrades of Vortec 8100 include a new 18-bolt head bolt pattern, longer connecting rods, different symmetrical intake ports, different oil pan rails, and the use of metric threads throughout the engine. [13] This dual-quad version was immortalized in the Beach Boys song titled "409". In 1977, General Motors offered special trailering packages for its Chevys and GMC trucks, including the 1-tons. Opens in a new window or tab. Does anyone know how to create better fuel consumption for 454 engine in a Suberban vehicle? Despite its introduction in 1970 the basic design lived on in production cars and trucks through the early 2000's. It's even still available to this day as a crate engine directly from Chevrolet. The engine was first used in Mickey Thompson's Z-06 Corvettes at Daytona in the 1963 Daytona 250 Miles American Challenge Cup,[19] and then in 1963 Daytona 500 where the number 13 car, driven by Johnny Rutherford,[20] finished four laps down (in ninth place), with the top five cars being the heavier 1963 Ford Galaxie 500's. The engine was much the same up until 1987 when Chevy added EFI. The Chevy 454 uses a typical old-school V8 design like you'd find on small block engines like the Chevy 350 or Chevy 305. Richard Keinath, the original Mark II and IV design engineer stated that the MK III was a regular MK II design with a larger bore, but the Tonowanda plant didn't want to cast a block with a bore that large. A "Special Turbo-Thrust" further upped the power output to 305hp (227kW) with a single large four-barrel carburetor. [49] The motor itself weighs 680lb (310kg). PARTS INTENDED FOR COMPETITION USE ONLY. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. However, its generally more common when overheating or running hot for extended periods. The Chevy big-block engine started life as an evolution of the iconic automakers muscle car lineup to expand its horizons into bigger engines with more power. Most people familiar with Chevy engine terminology will be familiar with the LS designation of engines due to the LS family of small block engines that became available with the Corvette in the 90s and continues production into today. There were smooth running versions with hydraulic lifters suitable for powering the family station wagon, as well as rough-idling, high-revving solid lifter models usually applied to a minimally equipped, plain-looking, two-door Biscayne sedan fitted with the 425hp (317kW) version of the 427 - (RPO L72). Same as 396cuin (6.5L) L-34 from 1967 to 1969. Only special order versions of the 454 had aluminum heads. L-37: produced 1965 similar to L-78 except for having hydraulic lifters and slightly milder cam; 2-bolt main caps; designed specifically for the 1965. [21], Packard's V8-engine tooling and production rights were considered for purchase by Chevrolet. Knowing the year of manufacture will give a general idea if the engine may be a 454 c.i.d. All rotating assembly is forged. A Chevy as new as a 2000 Suburban or 2000 Silverado 2500 is available with the legendary big-block. Chevy 454 Engine Summary. Chevrolet actually advertised this engine as 450hp (336kW) for a short period of time. The Chevy 454 big block V8 is an exciting engine with lots of history. Its a big engine that generates considerable heat. This unleaded fuel-compatible engine comes completely assembled, with valve covers, timing chain cover, oil pan, harmonic balancer, flex plate and intake manifold, carburetor . The program aims to guide you every step of the way. Chevy 454 Engine Specs. Again, our primary focus is the original 454 but well circle back to the later variants including the currently available crate engine. Easily verified through GM Heritage Center website. You have to experience one to know how it . Chevrolet Performances 454 HO crate engine is a Big-Block bargain an affordable engine with performance specs that will make you think its 1970 all over again. The L21 was paired with the early 4 speed Allison automatic transmission or manual transmission, depending on the application. The best place to find a used Chevy engine is Craigslist. L-68: produced 19679, had 10.25:1 compression, 19962000 Chevrolet/GMC C/K GMT-400 platform trucks 2500 and 3500. [46][47][48], In 2021, Chevrolet Performance presented the largest and most powerful crate engine in the brand's history the ZZ632/1000 crate engine. 454 HO crate engines offer 438 horsepower and 500 lb-ft. Both the 366 and 427 commercial versions were built with a raised-deck, four-bolt main bearing cap cylinder to accommodate an extra oil control ring on the pistons. This arrangement guarantees all individual cylinders produce similar power.[52]. This crate engine must be used with the LS427/570 Engine Controller P/N 19420000, which must be purchased separately. A 409cuin (6.7L) version was Chevrolet's top regular production engine from 1961 to 1965, with a choice of single or 2X4-barrel Rochester carburetors. This arrangement was achieved by combining a cylinder head deck that was not perpendicular to the bore with a crowned piston, which was a novel concept in American production engines of the day. ), As impressive as the ZL1 was in its day, actual engine dyno tests of a certified production line stock ZL1 revealed 376hp (280kW) SAE net with output swelling to 524hp (391kW) SAE gross with the help of optimal carb and ignition tuning, open long tube racing headers, and with no power-sapping engine accessories or air cleaner in place. This engine was made from the 1960s until 2004.The 366 used 4 rings on the pistons, as it was designed from the very beginning as a truck engine. Instead, when issues do arise these are a few of the most common areas. ): 2.200 titanium intake / 1.610 hollow, sodium-filled exhaust, Rocker Arms (P/N 12579615 int): Investment-cast, roll trunnion, Rocker Arms (P/N 12579617 exh): Investment-cast, roll trunnion. The blob is garbled metal not a paint run, like there was nothing in that space. The Vortec 8100 L18 is a big-block V8 engine primarily used as a truck engine. The 427 became extremely popular due to its versatility and of course massive amounts of horsepower. Many custom engine builders across the United States, as well as a large variety of aftermarket components manufactured for the Big Block family, make it possible to build a complete Big Block engine that contains no Chevrolet components. The bore grows by 0.040in (1.0mm), compared to the 572-cubic-inch V-8s, with most of the displacement gain coming from a stroke that's 0.375in (9.5mm) longer. [41] The "Ram Jet 502",[42] the 496hp (370kW) / 565lbft (766Nm) crate motor, was offered with fuel injection, and came as a turn key setup which included all the wiring and electronics needed to operate in any vehicle. The Chevy 454 engine, also known as the Mark IV, was Chevrolet's second big block production motor, following the Mark I W-series engine from the late 1950s to the mid-1960s. Vortec 8100s were built at GM's Tonawanda Engine plant while the engine block and cylinder head were cast at Saginaw Metal Casting Operations. The 396cuin (6.5L) V8 was introduced in the 1965 Corvette as the L78 option and in the Z16 Chevelle as the L37 option. Click for more details. In 1961, power was again increased to 340hp (254kW) for the single four-barrel model, and 338hp (252kW) when equipped with triple two-barrels. Attached to this crankshaft, was a set of I-Beam forged steel connecting rods, which featured forged aluminum . The 454 EFI version was rated from 230hp (172kW) to 255hp (190kW) and from 385lbft (522Nm) to 405lbft (549Nm) of torque. L88 had a 12.5:1 compression ratio with closed chamber heads except during the last half of 1969, when it had open chambered heads that yielded 12.0:1. It had a dry weight of approximately 665 pounds (302kg), depending on the type of intake manifold and carburetion systems present. History. *Our primary focus in this article is the original 454 big block engine from 1970-1976. The original 454 engine is best known for its use in early 70s muscle cars like the El Camino, Corvette, Chevelle, and Monte Carlo. Otherwise, there are a few Chevy 454 problems that pop up more often than other issues. This motor, dubbed the L19, featured the same cast iron . The primary focus is still the original muscle car 7.4L V8, but we will clarify if certain issues affect a specific variant more than others. When I have nothing else to do, I watch documentaries and animations. While I like peace and quiet, I love playing with my kid. The most powerful variants of the 454 were in the year 1970 because this was before the oil embargo and tightening emissions restrictions. CHEVROLET PERFORMANCE TRANSMISSION (PART-ONLY), Designed, engineered, and tested to stringent Chevrolet specifications, Installation Kit included for ease of installation, Packaged solution with conveniently matched engine, transmission, torque converter, and transmission controller to fit your customized needs, Simplified part-sourcing process, eliminating the need to independently source compatible components, Factory tuned and calibrated to fit your unique application, Eligible for $500, $750, or $1,000 mail-inrebate See Rebate website for details. As such, we will briefly discuss the various 454 ci engines from 1970 up to the modern crate engine. GM sold the Vortec 8100 to Workhorse (now a division of Navistar), making it one of the most popular engine choices in gas powered Class A motorhomes during the first decade of this century. "Engineering the 'W' Engine--Chevrolet's 348-cu-in. Introduced in 1996, it was produced for five years, until replaced by the Vortec 8100. NEXT:Swapped! Chevrolet Performance's LS427/570 crate engine also employs distinct high-rate valve springs, low-profile LS7 EFI intake manifold, fifth-gen Z/28 exhaust manifolds, forged steel crankshaft, titanium connecting rods, CNC-ported cylinder heads as well as 14-inch Camaro Z/28 168-tooth manual transmission flywheel. General Motors began offering a newly developed 572cuin (9.4L) in 1998[43] to the aftermarket via its GM Performance Parts division. This later version of the engine is the L19 and features electronic fuel injection (EFI). which dropped the total engine weight into small-block territory (approx. All other versions, including the 1990 SS, made 230 HP at 3600 RPM and 385 TQ at 1600 RPM through a single 3" catalytic converter. McNally Institute", "What is the weight of a Chevy 454 engine? Although introduced as the Vortec 7400 in 1996, it was basically a 454 Big-Block with a hydraulic roller cam, parts more suitable for use in light duty trucks, and more advanced technology. So, if you dont feel like trudging through a junkyard to find one and you need one for a project, you can still buy one brand new. Estimated Ship Date: Jul 19, 2023 (if ordered today) Additionally, the bore and stroke remained the same throughout the entire production run as well. Chevrolet gave all 427 engines except the ZL1 a torque rating of 460lbft (624Nm). One benefit to the Chevy 454 is the number of these engines that were produced over the years. Lets take a look at the history of the Chevy 454 and what vehicles youll find it in. "The 454 uses a cast-iron engine block and aluminum cylinder heads and used this construction throughout its entire production run." Best UOA we got using a sub-50 oil was using RT6, delivering high 40s on iron over a 100 hour OCI. Also, some failures may be more or less common on certain years or variants of the 454 big block. These 454s with four-barrel carburetors developed 230 horsepower and 360 foot . The Chevy 454 has some known issues with exhaust manifolds, the cylinder head, and backfiring. The Chevy 454 is no doubt a strong, reliable motor. You can still purchase a 454 big-block V8 crate engine from Chevy themselves, which only confirms its firmly planted legacy. This large difference in power suggests that the OEM exhaust manifolds and exhaust system were highly restrictive in the ZL1 application, as was also the case with the similar L88. Fuel is delivered through eight-port injectors, with the engine breathing through CNC-machined high-flow aluminum cylinder heads featuring symmetrical ports. 19732000 Chevrolet/GMC C/K GMT-400 platform trucks 2500 and 3500, 19982001 Chevrolet Kodiak/GMC TopKick/Isuzu H-Series 4500 5500, The LS5 454 engine has a compression ratio of 10.25 to 1, The LS6 454 engine has a compression ratio of 11.25 to 1, The Vortec 7400 454 engine has a compression ratio of 8.5 to 1, The 454 HO crate engine has a compression ratio of 8.75 to 1. L-36: produced 19669, had 10.25:1 compression, Holley or Q-jet carburetor, nodular iron crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps. Its best known for its use in the 1970-1974 Corvette, but its also popular in the Caprice, Chevelle, and El Camino of the same era. Another possible problem with Chevy 454 exhaust manifolds is the manifold itself cracking. While Chevrolet did produce a select few 427-cubic-inch engines a few years prior (the Z11) for the Chevy Impala, the wildly popular Chevy 427 V8 engine became available to the general public in 1966. 454 HO Crate Engine | Big Block | Chevy Performance Parts, Emissions Standards Compliance | Chevrolet Performance, Block (P/N 19170538): Cast-iron with four-bolt main caps, Connecting Rods (P/N 19170198): Forged steel, Camshaft Type (P/N 24502611): Hydraulic roller, Camshaft Lift (in. There is a lot of knowledge about these engines and tons of aftermarket upgrades and solutions for existing issues. Coverage limited to defects in material and/or workmanship of the specific part only. The ZZ632's iron block shares a mold with Chevrolet Performance's ZZ572 crate engines, but the castings are machined to accommodate the huge 632 cubic-inch displacement. As the name suggests, the Chevy 454 big block V8 delivers a 454 cid displacement or 7.4 liters. It responds excellent to basic modifications such as a 266H or 268H cam Holley 750Dp/Performer-2 Intake and Headers to get trouble free 400+Hp and tons of torque. Though things like compression, fuel injection, and emissions systems have changed over the years, the basic 454 construction remains identical to the day it first came from Chevy. Chevrolet Performances LS7 crate engine is derived from the production specs of this racing-bred engine. The long-term solution is opting for a set of aftermarket headers. 454 big block in a 1970 Chevrolet Chevelle SS. This engine debuted in 1965, and sparked a long-time tradition of Chevy big-block engines. Period magazine tests of the ZL1 were quite rare due to the rarity of the engine itself. During development, a single-engine endured more than 200 simulated drag strip passes on a dynamometer. This engine was identical to the 425hp (317kW) L72 427 (first introduced in 1966), but was fitted with 3X2-barrel Holley carburetors,[29] known as "Tri-Power", in lieu of the L72's single 4-barrel carburetor. Indeed,this new crate engine offers more output and torque -- 570 hp at 6,200 rpm and 540 lb.-ft. at 4,800 rpm -- making it around 65 hp and 70 lb.-ft. more powerful than the production-based LS7 crate engine. These numbers are already pretty high, as these are enough to make a fifth-gen Camaro Z/28 very track capable with a 0-60 mph sprint time of around 3.9 seconds. It started life as a major upgrade from the 348/409 W motor. There have been many different versions of the 454 engine that were made by Chevrolet from 1970 through 2001 and a lot of them come with different amounts of horsepower. As with all these variants, its the same 454 cubic inch (7.4L) engine with a cast iron block and 4.25x4.0 bore and stroke. [36][37], It has been suggested[by whom?] Additionally the main oil galley was moved from near the oil pan to near the camshaft. The ZL1 specifications were nearly identical to the production L88 version of the 427, but featured an all-aluminum cylinder block, in addition to aluminum cylinder heads, which dropped the total engine weight into small-block territory (approx. Ensure the cooling system is up to the task of keeping temperatures in check. So, if youre looking for a new tow vehicle in the form of a classic Chevy or GM truck or SUV, one equipped with a 454 is sure to offer the torque you need to get yourself, your friends and family, and whatever youre hauling where you need to be. An automotive journalist for over six years, Braden Carlson has contributed to a variety of auto websites, including Team Speed and LS1Tech. Another possible cause of backfires is engine timing. Compared to the 283 "Small Block," it measured 1.5 inches longer, 2.6 inches wider, and 0.84 inches less tall. LS4 and LS5 versions became the only production engine available in Chevy or GM vehicles. Last up are issues with the Chevy 454 overheating. Meanwhile, the LS6 in the Chevelle could deliver up to 450hp with the 4 barrel carb. Both L88 and ZL1 optioned cars continued to be built with closed chamber heads until approximately March 1969, when the open combustion chamber aluminum heads finally were in production and began being fitted to the L88 and ZL1 engines. L-34: produced 1970. Mark IV engines saw extensive application in Chevrolet and GMC medium duty trucks, as well as in Blue Bird Corporation's All American and TC/2000 transit buses (the latter up until 1995, using a 427 with purpose-built carburetor). By the mid-70s, high gas prices and growing fuel economy restrictions effectively snuffed the great battle between American automakers seeking dominance in the muscle car field. This engine combination would be outstanding in your car, street rod, truck, 4X4, or marine application. By Jason Reiss June 07, 2013. Rat-Sized Mouse Motor: Chevrolet's LSX 454 Crate Engine, Chevrolet Performance's LS427/570 crate engine, Swapped! The engine had a relatively short lifespan, having its horsepower cut in half by the mid-seventies over new emission . In this guide, we discuss Chevy 454 engine specs, performance, reliability, upgrades, and more. The valves continued to use the displaced arrangement of the W-series engine, but were also inclined so that they would open away from the combustion chamber and cylinder walls, a design feature made possible by Chevrolet's stud mounted rocker arms. The power increase of the LS427/570 crate engine is primarily thanks to the employment of a new, specially developed high-lift hydraulic roller cam. 348cuin (5.7L), available from 1958 to 1961 in cars, and in light trucks through 1964; 409cuin (6.7L), available from 1961 to 1965; and. Also you did not mention the progression from the W motor to the Mark IV designation. Chevrolet Big Block Engine VIN Number. As before mentioned, the 454 came in various cars from 1970 to 1975. The same engine was upped to 380hp (283kW) in 1962. Symptoms are similar to old, leaking gaskets and its also generally a fairly minor issue. The cast iron design of the head makes it strong, but there are some known issues with certain parts inside the cylinder head. Connect with us via email and social media today. Well cover this topic in greater depth in a future article targeted towards modding the 454. This is a classic engine from Chevrolet and stock it makes great power from the factory, if you upgrade it you can get even more out of it. PARTS INTENDED FOR COMPETITION USE ONLY. The Chevy 427 V8 was produced officially for the masses beginning in 1966. Click for more details. While most 454ci V8s were of a two-bolt main design, a number of four-bolt main LS5s have been recorded. The original arose in the form of the 396ci L78 engine, which made 425 horsepower and 445 lb-ft of torque. To some, the Chevrolet 454 big block was the right engine at the wrong time. For 1970, the Big-Block was expanded again, to 454cuin (7.4L), with a bore x stroke of 4+14in 4in (108.0mm 101.6mm). My big block is a #140154445, a truck block from 78-90(?) The 350 and 454 are two great engines that were produced by Chevrolet and choosing the right one for your car really depends on how you plan on using it. ): 0.648 intake / 0.648 exhaust, Camshaft Duration (@0.050 in. As such, the older 454 LS engines are not to be mistaken with the common LS engine family. The Chevy 454 engine was one of the most powerful engines of the big-block V8 series that the muscle car legacy has ever witnessed, even to this day. Overall, the Chevy 454 stands out as an iconic part of Chevrolet, GM, and motorsports history. The last pull of the day was conducted on lousy, California-standard 87-octane fuel. Despite the swill, the engine cranked out an awesome 567.2 horsepower and 537 lb-ft of torque, sounding like a . , Packard 's V8-engine tooling and production rights were considered for purchase by Chevrolet in Chevy or GM vehicles these... Rt6, delivering high 40s on iron over a 100 hour OCI form of the casting looked! Short period of time the first major update to the task of keeping temperatures check. Chevrolet 454 big block V8 is an exciting engine with aluminium head option very heavy and hot engine it! 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