It was available from 1958 to 1961 (through 1964 in trucks). This decision would hold throughout the 1980s, with the Chevy 454 gaining a fuel injection boost in 1987. ): 236 intake / 246 exhaust, Cylinder Heads (P/N 19354239): Aluminum LSX-LS7 port; with as cast 70-cc chambers, Valve Size (in. "Engineering the 'W' Engine--Chevrolet's 348-cu-in. In the 1963 model year, output reached 425bhp (431PS; 317kW) @ 6000 rpm and 425lbft (576Nm) @ 4200 rpm of torque with the Rochester 2X4-barrel carburetor setup, a compression ratio of 11:1 and a solid lifter camshaft. Its lighter and more compact than an original Big-Block 454. Click for more details. The oil embargo by OPEC. The Chevrolet Corvette with the LS5 version delivered 390hp. Its the same cast iron block and same bore x stroke. $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. Check the vacuum advance unit and vacuum lines as these are common causes. The first major update to the Chevrolet 7.4L big block engine came in 1987 with the switch to EFI. McNally Institute", "What is the weight of a Chevy 454 engine? PARTS INTENDED FOR COMPETITION USE ONLY. Owing to the appearance of the compound angularity of the valves,[24] the automotive press dubbed the engine the "porcupine" design. Also, some failures may be more or less common on certain years or variants of the 454 big block. SAE Transactions, Volume 67 (1959), 103. 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. The site's quote form is easy to fill out, and includes information about the engine's availability, price, and mileage. Offer valid 1/1/23 to 12/31/23. 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. Part Number: MLL-PS4541CT. Furthermore, the 454 is a great option if youre looking for a crate engine for your race car or a mid-seventies GM or Chevy classic muscle car. that the LS-6 was nominally substantially underrated, which was a common practice of American car makers;[citation needed] and that the engine actually produced well over 500hp (373kW) as delivered from the factory. The 454 was . Despite the swill, the engine cranked out an awesome 567.2 horsepower and 537 lb-ft of torque, sounding like a . 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. In 1970, GM pushed the performance bar higher with the introduction of the Chevy 454 V8. Vortec 8100s were built at GM's Tonawanda Engine plant while the engine block and cylinder head were cast at Saginaw Metal Casting Operations. While this option produced no power advantage, it did reduce engine (and hence, vehicle) weight by roughly 75 pounds (34kg). 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. Casting number 3999289. Add To Cart. It was also used in marine applications. ", https://en.wikipedia.org/w/index.php?title=Chevrolet_big-block_engine&oldid=1150217102, Short description is different from Wikidata, Articles needing additional references from July 2013, All articles needing additional references, Wikipedia introduction cleanup from April 2021, Articles covered by WikiProject Wikify from April 2021, All articles covered by WikiProject Wikify, Articles with multiple maintenance issues, Wikipedia articles needing clarification from October 2014, Articles with unsourced statements from October 2014, Articles with unsourced statements from December 2011, Articles with specifically marked weasel-worded phrases from October 2021, Articles with unsourced statements from October 2021, Creative Commons Attribution-ShareAlike License 3.0, 8.5:1, 9.0:1, 10.25:1, 11.0:1, 12.0:1, 12.5:1, 13.5:1, 4-barrel + solid-lifters, more aggressive cam and high flow cylinder heads. However, after 2001, the 454 no longer was an option for production GM vehicles. The engine had MPFI (multi-port fuel injection), which gave slightly more power and better fuel economy, and 2 valves per cylinder. Unfortunately, there is no evidence from GM that shows 57 cars were built. It had a forged steel crankshaft. The LSX 454 crate engine is a 21st-century upgrade to the legendary Chevy 454 big block race engine. The same engine was upped to 380hp (283kW) in 1962. Furthermore, it laid the path for more modern variants of the big-block Chevy engine like the Vortec 8100. The LS6 was the more powerful variant but it was quickly phased out following 1971. [54][55][56][57][58][59], Other important differences between the Vortec 8100 and older big-blocks include a changed firing order. With age and mileage the gaskets wear down and begin leaking. Some older 454s will likely require a little extra TLC due to age and mileage. 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. Finally, all 454s use standard camshaft-in-block construction with pushrods to control the valves. In the next sections well discuss a few of the primary variants of the 7.4L big block V8. The ZZ632/1000 crate engine is slated to be on display at the 2021 SEMA Show in Las Vegas, November 25. NEXT:Swapped! The blob is garbled metal not a paint run, like there was nothing in that space. The engine had a relatively short lifespan, having its horsepower cut in half by the mid-seventies over new emission . [27] The solid lifter version was capable of being operated in the upper 6000 rpm range, and when installed in the 1965 Corvette, was factory-rated at 425hp (317kW). A "Special Turbo-Thrust" further upped the power output to 305hp (227kW) with a single large four-barrel carburetor. You can still purchase a 454 big-block V8 crate engine from Chevy themselves, which only confirms its firmly planted legacy. You can source the 454 HO directly from Chevrolet. As such, we will briefly discuss the various 454 ci engines from 1970 up to the modern crate engine. Power output ranged from 210 to 340hp (157 to 254kW), and torque from 325 to 455lbft (441 to 617Nm). (102 octane RON [Sunoco 260] represented the highest octane gasoline sold at common retail stations. The bore was increased to 4+14in (108mm), with power ratings varying widely depending on the application. 409ci: The 409 was introduced at 360 hp . The original 454 engine is best known for its use . The models most likely to have the 454 are early 1970s Camaro and Chevelle SSs, Corvettes, Monte Carlos and Chevrolet/GM trucks. In 1996, Chevrolet released their 7.4 Vortec V8 engine, also known as the Vortec 7400. It produced 335hp (250kW). 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. This too helped high RPM performance. Prior to the 454, Chevy was using the 427, a Mark IV engine that produced 425hp. [citation needed] The first Corvette with the RPO ZL1 engine package was built in early December 1968 and featured aluminum closed chamber heads shared with the L88. 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. It had a dry weight of approximately 665 pounds (302kg), depending on the type of intake manifold and carburetion systems present. Good simple review. Unless youre picking up a super clean 7.4L big block then expect to shell out a bit of money to replace old, worn parts. In 1961, power was again increased to 340hp (254kW) for the single four-barrel model, and 338hp (252kW) when equipped with triple two-barrels. While Big Blocks have usually been designed with variations in port shape from cylinder to cylinder, all eight intake ports of the ZZ632 have the same volume, length, and layout. That's one of the reasons why fuel consumption is high for this engine. Additionally the main oil galley was moved from near the oil pan to near the camshaft. Chevrolet gave all 427 engines except the ZL1 a torque rating of 460lbft (624Nm). "The 454 uses a cast-iron engine block and aluminum cylinder heads and used this construction throughout its entire production run." Its hard to go a day in the automotive world without hearing the comment, just LS swap it. The LS small block engine family didnt come around until 1997, but Chevy was using the LS designation long before then. Chevrolet 454 engines never really disappeared since 1970. In 1970 the LS5 and LS6 454 big-block V8 engines became available to the public in various GM vehicles. The Engine VIN Number is the last 6 or 9 digits of the vehicle's VIN number. The cast iron design of the head makes it strong, but there are some known issues with certain parts inside the cylinder head. PARTS INTENDED FOR COMPETITION USE ONLY. This engine was rated at 230 net hp, 380ft lbs net torque, and was discontinued after 1995, GM coming out with the Vortec 7400 in 1996. PROPOSITION 65 WARNING. E1973. Look for any tags in the engine compartment or the trim tag located on the fire wall . However, Chevy still offers the 454 big block V8 as a crate engine. It first debuted in 1970 as an upgrade to the equally iconic Chevy 427 big-block V8. It produced 385hp (287kW) in 196768 full-size cars, 390hp (291kW) in 1969 full-size cars and Corvettes (by exhaust system). Most new 454 engines from this year were released with a seven-year or 100,000-mile warranty, and these engines are . Due to the new spark plug angle, the clearance provided by the distinctive scalloped valve covers of the W-series was no longer needed, and wide, rectangular covers were used. The cylinder block, although more substantial in all respects, used the same cylinder bore pitch (bore spacing) of 4.84in (123mm) with a larger 2.75in (70mm) main bearing dimension, increased from the 2.5in (63.5mm) of the older engine (in fact, the shorter-stroke 348 and 409 crankshafts could be installed with the use of "spacer bearings" without modifying the crankshaft). The necessity of making special heads to provide a range of compression ratios and to permit attachment of accessory mountings for the various model applications is of serious concern to the manufacturing and service departments.Inclining the top of the block to 16 deg and shaping the top of the piston like a gabled roof with a 16-deg angle resulted in a 32-deg wedge-shaped combustion space.The addition of two milled cutouts [in the head] to extend the volume of the combustion wedge can create a compression ratio of 7.5/1; one milled cutout produces a 9.5/1 compression ratio. All rotating assembly is forged. The Chevrolet 454-cubic-inch, or 7.4-liter, V-8 engine was a brawny gas-guzzling powerplant that should have died an ignoble death after the 1973 fuel crisis. We research hundreds of models each Typical magazine road tests of the day yielded 0-60mph (97km/h) in 5.6 seconds and 14 mile (402m) in 13.8 second at 104mph (167km/h) range for both the L72 and L71. It was, however, available as a crate engine for high-performance uses. 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. 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. Dec 8, 2015. 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. 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 427 became extremely popular due to its versatility and of course massive amounts of horsepower. Last up are issues with the Chevy 454 overheating. The Chevy 454 big block V8 is an exciting engine with lots of history. 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 . Also the BB weights right at 200 lbs more than the SB chevy. 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. In 1987, the 454 switched from a carburetor to fuel injection, bumping power to 255 horsepower and 405 lb.-ft. of torque. 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. However, long before the LS1 was introduced, GM used the LS designation for the family of 454 big-block engines. 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