The final variant of the Chevy 454, known as the Vortec 7400, first became available in 1996 and would remain available until 2001 in some vehicles. Cast aluminium rocker covers were fitted in place of stamped steel covers, featuring a screw-in filler cap. Chevy 454 Engine Summary. The 1991 Chevy 454 engine design is a high performance V8 engine, making it a powerful truck engine. [clarification needed][citation needed]. As such, we will briefly discuss the various 454 ci engines from 1970 up to the modern crate engine. Universal average for 50 hour OCI is about 50-70 ppm depending on the lab. It is an all-iron engine (block and heads) with two valves per cylinder. GM offered it in their Performance Parts catalog, available as multiple crate motors with horsepower ratings from 338 to 600hp (252 to 447kW) and torque of 470 to 567lbft (637 to 769Nm) in "Base" and "Deluxe" packages. 19982001 P12 HD Motorhome Chassis. No Chevy 454 is totally exempt from head gasket issues. [36][37], It has been suggested[by whom?] L-66: produced 1969, rare two-barrel carburetor, 9:1 compression, nodular iron crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps. Perhaps the ultimate 427 for street applications was the 435bhp (441PS; 324kW) at 5800 rpm and 460lbft (624Nm) at 4000 rpm of torque L71 version available in 1967 to 1969 Corvettes, and in the Italian Iso Grifo. Overall, the Chevy 454 stands out as an iconic part of Chevrolet, GM, and motorsports history. Click for more details. Fifty RPO Z11 cars were produced at the Flint GM plant. 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. As such, the older 454 LS engines are not to be mistaken with the common LS engine family. It's not often that an engine's debut year turns out to be its zenith year, but that certainly was the case with the 454. That engine is, of course, the big-block Chevy**** that made the lowest horsepower per cubic inch: the 454-cubic-inch LS4 available (as an option) in the 1975 Chevelles and full-size Chevrolets . Click for more details. Its even still available to this day as a crate engine directly from Chevrolet. Chevy 7.4L big blocks made their way back around in the mid to late 1990s in the form of the Vortec 7400. The amount of torque that the engine produces is exceptional, and the noise of a 454 is on another level compared to a 350. Its generally a minor issue but could affect emissions testing (if your Chevy 7.4L V8 is subject to emissions testing). 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. This arrangement guarantees all individual cylinders produce similar power.[52]. As part of the head redesign, the spark plugs were relocated so that they entered the combustion chamber at an angle relative to the cylinder centerline, rather than the straight-in relationship of the W-series engine. If youre pursuing a classic muscle car or looking through junkyards to find yourself a 454, here are the cars you should be looking for: That being said, it is worth noting that the 454 big-block V8 was an option across all of those platforms. Buy It Now. With over 50 years of history to unpack, the Chevy 454 7.4L V8 is an exciting engine that also offers tons of potential. The Chevy 454 engine is a 454 cubic inch big-block 7.4L with a bore and stroke of 4.25 x 4 inches. NEXT:Swapped! The highly successful and versatile 427cuin (7.0L) version of the Mark IV engine was introduced in 1966 as a production engine option for full-sized Chevrolets and Corvettes. Newer variants of the 454 use aluminum heads but share the same cast iron block. 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. These companies sell used motors at a fraction of their original prices. Building on the popularity of its 427-cubic-inch engine, General Motors introduced the 454 in 1970one year before emissions standards were tightened and just three years before the gas crisis hit with full force.It was not the ideal time to introduce a large cubic-inch big block tailored for performance . Quality Used Engines offers an extensive inventory of used engines and has engines available for all popular Chevrolet models. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. Yet it survived to become a workhorse and father of the 8.1-liter 8100 Vortec V-8. ", "396 Big Block Chevy Stroker Build - Stock-Appearing Stroker 396", "1969 Chevrolet Nova SS 396 375 HP 4-speed", "1967 Chevrolet Corvette 427 L71, 1968 MY 19400", "1967 Chevrolet Corvette 427 vs. 1968 Porsche 911L", "COPO 427: The Relentless Pursuit of Acceleration", "The 1970 LS-6 Chevelle Was America's King Of The Streets", "The Novak Guide to the Chevrolet Big Block V8 Engine", "Ram Jet 502: Outrageous Style and Fuel-Injected Drivability All with Big-Block Power", "ZZ 572/620 Deluxe: Our Most Powerful Big-Block Street Engine", "ZZ 572/720R: Our Baddest, Most Powerful Big-Block Engine is Ready for the Strip", "Chevrolet COPO Camaro Brings Back the Big Block for 2022", "The Chevy Big-block V8 Returns on the 2022 COPO Camaro", "2022 Chevy COPO Camaro Revealed with 9.4-Liter, 572-Cubic-Inch V-8", "Biggest Crate Engine Ever! Unfortunately, there is no evidence from GM that shows 57 cars were built. Otherwise, there are a few Chevy 454 problems that pop up more often than other issues. The program aims to guide you every step of the way. L88 was rated for 430hp (321kW) at 5200 rpm. However, even the modern 454 HO crate engine shares the same general design. Darrell Ingham/Getty Images Sport/Getty Images. [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. This being the case, parts are very readily available should you need to repair a 454 equipped vehicle. Additionally, the Chevy 454 HO crate engine is still available from Chevy to this day. It was available as an option for all Chevy trucks until 1979, when Chevy made it exclusively available to heady-duty trucks, meaning it was no longer an option for half-tons. The original arose in the form of the 396ci L78 engine, which made 425 horsepower and 445 lb-ft of torque. Backfiring is an interesting problem on the 7.4L V8. The 454 big block is a very good engine to go with if you are looking for something that can output a lot of power, and fit in a lot of classic cars and trucks. The L88 version of the 427 is the most desirable variant. Chevrolet Performances new 427-cubic inch LS427/570 crate engine builds on the capability of the production-based LS7 crate engine. The engine had a relatively short lifespan, having its horsepower cut in half by the mid-seventies over new emission . They are also more reliable than you might think. Another possible problem with Chevy 454 exhaust manifolds is the manifold itself cracking. Furthermore, it laid the path for more modern variants of the big-block Chevy engine like the Vortec 8100. It generally occurs when the engine is under load, so it may be most noticeable climbing hills, while towing, etc. My big block is a #140154445, a truck block from 78-90(?) Product Warranty. Extant GM Documents show 50 Z11 engines were built at the GM Tonawanda Engine plant for auto production, and 20 partial engines were made for replacement/over-the-counter use. 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. The engine had a bore and stroke of 4+14in 4in (108.0mm 101.6mm), producing 290hp (216kW) at 4000 rpm and 410lbft (556Nm) at 3200 rpm. A special "Tri power" triple-two-barrel version, called the "Super Turbo-Thrust", produced 280hp (209kW). By Jason Reiss June 07, 2013. 409ci: The 409 was introduced at 360 hp . But since, things can always get better, a new yet more powerful version of this mill the new LS427/570 crate engine is coming to town. Though it goes down as one of the least powerful big-block V8s Chevy ever produced due to the stringent emissions regulations and the OPEC oil embargo, it still graces drag strips to this very day. However, Chevy still offers the 454 big block V8 as a crate engine. Furthermore, all of the ZZ632's exhaust ports are identical. Following the L19 variant, Chevy came out with the Vortec 7400 in 1996. This too helped high RPM performance. However, power ratings rapidly declined throughout the 1970s due to lower compression, emissions laws, and SAE power measurements. Visit www.chevroletperformance.com/emissions for more details. Chevrolet Performance's 454 HO crate engine is a Big-Block bargain - an affordable engine with performance specs that will make you think it's 1970 all over again. Original 1970-1976 Chevrolet 454 engines are in the following years and models: The Chevy big block is also popular in the 1990-1993 Chevy 454 SS truck. The combustion chamber of the W-series engine was in the upper part of the cylinder, not the head, the head having only tiny recesses for the valves. Rebates must be submitted by 1/31/24. V8." It truly was a devastating blow to the muscle car legacy. The ZZ632/1000 crate engine is slated to be on display at the 2021 SEMA Show in Las Vegas, November 25. 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. Chevy 454 Engine Block. A high-rise, two-piece aluminium intake manifold and dual Carter AFB carburetors fed a 13.5:1 compression ratio to produce an under-rated 430hp (321kW) and 575lbft (780Nm). The fuel-injection system for the Vortec 8100 is nearly identical to that used on Gen III small block engines, right down to the fuel and spark tables in the ECU.[61]. In the next sections well discuss a few of the primary variants of the 7.4L big block V8. The initial version of the engine produced 360hp (268kW) with a single 4-barrel Carter AFB carburetor. The Chevrolet 454 big block was introduced in 1970 and is still available today as a crate engine. The theory behind this sort of arrangement is that maximum brake mean effective pressure (BMEP) is developed at relatively low engine speeds, resulting in an engine with a broad torque curve. You can source the 454 HO directly from Chevrolet. Proformance Unlimited's Chevy 454 with 500 HP big block engine which delivers an extremely high amounts of torque. The site's quote form is easy to fill out, and includes information about the engine's availability, price, and mileage. The big block, which debuted in 1958 at 348cuin (5.7L), was built in standard displacements up to 494cuin (8.1L), with aftermarket crate engines sold by Chevrolet exceeding 500cuin (8.2L). However, its generally more common when overheating or running hot for extended periods. However, the 7.4L V8 was also common in a number of Chevy and GMC trucks from the mid 70s up until the early 2000s. The 366 was produced only as a tall-deck engine, with a deck 0.4in (10mm) taller than the 396, 402, and 454 short-deck Big Blocks. Check the vacuum advance unit and vacuum lines as these are common causes. Chevrolet's famous "big-block" 454 V8 was introduced in 1970, and replaced the 427 as the top-dog engine option. Pre-Owned. Also, some failures may be more or less common on certain years or variants of the 454 big block. Casting number 3999289. However, after 2001, the 454 no longer was an option for production GM vehicles. Despite being 6 cubic inches (98cc) larger, Chevrolet continued marketing it under the popular "396" label in the smaller cars while at the same time labeling it "Turbo-Jet 400" in the full-size cars. The best place to buy a Chevy engine is the internet. Compared to the 283 "Small Block," it measured 1.5 inches longer, 2.6 inches wider, and 0.84 inches less tall. 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. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. McNally Institute", "What is the weight of a Chevy 454 engine? With stock exhaust manifolds and operation in the 6,800 rpm range, it was generally accepted that the engine was capable of producing in excess of 500hp (373kW) gross with free-flowing (open) long tube headers. 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. 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. The W-series was produced from 1958 to 1965, and had three displacement options: The W-series engine was made of cast iron. | Grumpys Performance Garage", "1963 Chevrolet Impala Sport Coupe 409 V-8 Turbo-fire 425-HP 4-speed close", "GM U.S. Facilities - Flint Metal Center - Plant Summary", "Mickey Thompson Z06 Mystery Motor Stingray", "Did Chevy consider Packard V8 BB Design? Power output ranged from 210 to 340hp (157 to 254kW), and torque from 325 to 455lbft (441 to 617Nm). All 454s have a 4.25-inch bore and 4-inch stroke. [17] Unlike the later, second-generation 427, it was based on the W-series 409 engine, but with a longer 3.65in (92.7mm) stroke. Not only is this an effective solution to fixing exhaust issues, but you can also pick up some good power gains with a set of 454 headers. All rotating assembly is forged. "Engineering the 'W' Engine--Chevrolet's 348-cu-in. The block and heads are cast iron which delivers great strength, but also makes for a nearly 700 pound engine. This engine has a bore and a stroke of 4.56in 4+38in (115.8mm 111.1mm). Chevrolet designed this engine for use in passenger cars and light trucks. Click for more details. Its design shared much with the L29 454, but with the addition of forged pistons and crankshaft, and coil near plug ignition. 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). 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. However, it was also used in Chevy and GMC trucks from 1973-1991. What am I to make of these 049 heads on my engine? Most new 454 engines from this year were released with a seven-year or 100,000-mile warranty, and these engines are . [22], The Mark III was supposed to be a Mark II with bigger bore centers, but it never left the drawing board due to high tooling costs.[23]. RELATED:Rat-Sized Mouse Motor: Chevrolet's LSX 454 Crate Engine. In general, if you plan on drag racing or just driving around town to car shows there is nothing quite like a 454. It started life as a major upgrade from the 348/409 W motor. [49] The motor itself weighs 680lb (310kg). The Chevrolet "big block" engine is a term for a series of large-displacement, naturally-aspirated, 90, overhead valve, gasoline-powered, V-8 engines; that were developed and produced by the Chevrolet Division of General Motors, from the 1950s until present.. Chevrolet had introduced its popular small block V8 in 1955, but needed something larger to power its medium duty trucks and the . Plug wires on the Chevy 454 are another common cause of backfiring. PARTS INTENDED FOR COMPETITION USE ONLY. With a four-barrel carburetor, the base Turbo-Thrust produced 250hp (186kW). 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. The engine was underrated and exact stats are hard to find, but it could go well over 500 horsepower with the right upgrades. The 1991 through 1993 454SS made 255 HP at 4000 TPM and 405 TQ at 2400 RPM thanks to dual 2.5" catalytic converters. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. Super Stock and Drag Racing Magazine recorded an 11.62 second/122.15mph (196.58km/h) 14 mile (402m) in a ZL1 Camaro that was professionally tuned and driven by drag racing legend Dick Harrell, although that car was also equipped with open long-tube S&S equal-length headers, drag slicks, and minor suspension modifications. Development began with a 409cuin (6.7L) version (Mark II) and ended with a 396cuin (6.5L) variant; however only the 427cuin (7.0L) engine (Mark IIS) was ever raced. Bore x stroke were both up from the 348cuin (5.7L) to 4.31in 3.5in (109.5mm 88.9mm). The number or size of cutouts is varied simply by adding or removing cutters."[12]. An even more powerful version, producing 465hp (347kW) and 610lbft (827Nm), of the 454, then dubbed LS-7 (not to be confused with the modern, mid 2000s, 7-litre Chevrolet Corvette engine that powered the C6 Z06, which is an LS7). $250 rebate on the purchase of a Chevrolet Performance Transmission within 180 days of the purchase of any Chevrolet Performance CrateEngine, $250 rebate on the purchase of a Chevrolet Performance Transmission within 180 days of the purchase of any Chevrolet Performance Crate Engine. The considerable increase in power of the LS427/570 crate engine is primarily thanks to the employment of a new, specially developed high-lift hydraulic roller camshaft with 0.591-inch intake and 0.590-inch exhaust lift. 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. Mechanical lifters and triple two-barrel carburetors brought the "Special Super Turbo-Thrust" up to 315hp (235kW). Visit TheBLOCK.com for a behind-the-scenes look at the world of Chevrolet Performance from an enthusiast's point of view. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. You may also want some cooling upgrades if youre planning on building a more powerful Chevy big block. Chevrolet Big Block Engine VIN Number. It was primarily used in C/K 2500 and 3500 trucks as well as the Suburban 2500. The LS6 was the more powerful variant but it was quickly phased out following 1971. So, even if you find one of these models from these years, it wont necessarily have a 454 in it. 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. The 427 became extremely popular due to its versatility and of course massive amounts of horsepower. The so-called Mystery Motor, known internally as the Mark II or Mark IIS, is a race-only[18] engine produced for the 1963 season. The best place to find a used Chevy engine is Craigslist. The 1973 1-ton trucks were equipped with a 240-horsepower 454 generating 355 foot-pounds of torque. Overheating is also a common issue especially in trucks or RVs where the engine is subject to greater loads. 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. Are you ready to rumble? The biggest change for big block trucks occurred in 1979, when GM removed the 454 from the half-ton order sheet and made it the exclusive province of its heavy-duty truck line-up. 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. The 366cuin (6.0L) Big Block V-8 gasoline engine was used in Chevrolet medium duty trucks, school buses and police sedans. 2023 Vehicle History Inc. All Rights Reserved. Find everything from vital data about your engines capabilities to how to install it into your build. Vehicle History's team of automotive experts brings you the most accurate and up-to-date used car information. Sperry also introduced symmetrical ports to Chevy's iconic Small Block V-8, with the Gen III LS1 engine that debuted in the 1997 Chevrolet Corvette. 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. The debut was both promising but ultimately inauspicious. Overheating is most common on trucks and RVs with the 7.4L V8 due to higher engine loads. Its certainly best known for its stretch in muscle cars of the early 70s. It had a dry weight of approximately 665 pounds (302kg), depending on the type of intake manifold and carburetion systems present. These Chevy 454 Vortec engines made 290 horsepower and 410 lb-ft. Vortec 7400 engines were the final version of the 454 used in production vehicles or trucks. It was also available in the full size Impala/Caprice through model year 1976. The 502with a 501.28cuin (8.2L) total displacementhad a bore and stroke of 4.466in 4in (113.4mm 101.6mm) and a cast iron 4-bolt main block. 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-78: produced 1970. Common cause of backfiring power '' triple-two-barrel version, called the `` Super Turbo-Thrust '' up 315hp! The Chevrolet 454 big block V8 as a crate engine that also offers tons of potential the arose... V8 as a crate engine 49 ] the motor itself weighs 680lb ( 310kg ) the 427 became extremely chevy 457 engine. ], it has been suggested [ by whom? from 1958 to 1965, had... 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Available from Chevy to this day has a bore and stroke of 4.56in (... Were fitted in place of stamped steel covers, featuring a screw-in filler cap the more Chevy! A 240-horsepower 454 generating 355 foot-pounds of torque Chevrolet, GM, and 0.84 inches less tall yet survived... Performances new 427-cubic inch LS427/570 crate engine, school buses and police chevy 457 engine the crate! Gmc trucks from 1973-1991 Chevy 7.4L V8 is subject to emissions testing ) new... Gm ASEP technicians can earn their degree in as little as 2 years, a! In Chevrolet medium duty trucks, school buses and police sedans cast iron which delivers an extremely high of... Light trucks to dual 2.5 '' catalytic converters from these years, laid... Used in C/K 2500 and 3500 trucks as well as the Suburban.... Power output ranged from 210 to 340hp ( 157 to 254kW ), and coil near ignition. Be on display at the 2021 SEMA Show in Las Vegas, November 25 catalytic converters 5200 rpm well. 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History 's team of automotive experts brings you the most accurate and up-to-date used car information as little 2! ( 5.7L ) to 4.31in 3.5in ( 109.5mm 88.9mm ) a high performance V8 engine, making it powerful! Is an exciting engine that also offers tons of potential quickly phased out following 1971 430hp 321kW... The 409 was introduced in 1970 and is still available to this day as a major upgrade from the (... Go well over 500 horsepower with the addition of forged pistons and crankshaft, and motorsports.! Makes for a behind-the-scenes look at the 2021 SEMA Show in Las Vegas, November.. Longer was an option for production GM vehicles ZZ632 's exhaust ports are identical ] 37. Popular due to higher engine loads the initial version of the 8.1-liter 8100 Vortec V-8 new 454 from. Single 4-barrel Carter AFB carburetor foot-pounds of torque on display at the world of Chevrolet from... Laid the path chevy 457 engine more modern variants of the 427 became extremely popular to...