Mark IV engines also found themselves widely used in power boats. If you're unsure about what kind of . Click for more details. The engine is a pretty good one as it delivers 240HP and 355 torque. Click for more details. The Chevy 427 V8 was produced officially for the masses beginning in 1966. [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]. Opens in a new window or tab. 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. 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. Anticipating varied future compression ratios in future auto and truck use: "It was obvious that with the combustion chamber placed within the cylinder head, the foundry must retool every time a compression change is in order. Find everything from vital data about your engines capabilities to how to install it into your build. The 454 maintained the 427's 4.25 inch bore, but it increased the stroke to 4 inches, and it . 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. Is that a fact? 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 . A special "Tri power" triple-two-barrel version, called the "Super Turbo-Thrust", produced 280hp (209kW). The L21 was paired with the early 4 speed Allison automatic transmission or manual transmission, depending on the application. If youre sticking with the low factory compression ratio then you might want to go for high-torque cams. Are you ready to rumble? Overall, the Chevy 454 stands out as an iconic part of Chevrolet, GM, and motorsports history. That makes it all the more impressive, then, that the legendary Chevy 454 big-block V8 managed to claw its way through the oil embargo and live a healthy life on to the next millennium. It had a bore and a stroke of 3.935in 3.76in (99.9mm 95.5mm). Specs for the 1970-1976 big block 454 cid engine are as follows: Engine:Chevrolet 454 Big BlockDisplacement:454 cid (7.4L)Block/Heads: Cast IronConfiguration:90 V8Bore x Stroke:4.25 x 4.0Compression Ratio:10.25:1, 11.25:1, 8.2:1Firing Order:1-8-4-3-6-5-7-2Engine Weight: ~685 lbsMax Horsepower:450 hp @ 5600 rpmMax Torque: 500 lb-ft @ 3400 rpm. A few of the best Chevy 454 upgrades include: Starting with the basics like cams, headers, and intake mods can take the 454 big block a long way. Lets take a look at the history of the Chevy 454 and what vehicles youll find it in. Racing-spec cam, high-flow aluminium heads (casting #s varied by model year) and some upgraded, competition-grade parts, Aluminium block with open chamber "3946074" aluminium heads (the early Corvette RPO engine featured a closed chamber head); cam even "hotter" than L88's; upgraded parts similar to L88's. Allow 6 to 8 weeks for delivery of debit card. Beginning in 1969, the highest performance 427 models were fitted with the new open (vs. closed) chamber cylinder heads, along with design improvements in crankshafts, connecting rods, and pistons, adopted from the Can-Am development program. Same as 396cuin (6.5L) L-34 from 1967 to 1969. ( 2 ) Estimated Ship Date: May 1, 2023 (if ordered today) Free Shipping. 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. [45] The 572 is officially offered by Chevrolet for the 2022 model year COPO Camaro. Chevrolet 454 engines never really disappeared since 1970. The 454 EFI version was rated from 230hp (172kW) to 255hp (190kW) and from 385lbft (522Nm) to 405lbft (549Nm) of torque. 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. 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. Unfortunately, after 1971 the LS6 was phased out, and engineers dropped the LS5s horsepower to 245. The LSX 454 crate engine is a 21st-century upgrade to the legendary Chevy 454 big block race engine. 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. It produced 335hp (250kW). Last up are issues with the Chevy 454 overheating. Parts only when consumer repaired or installed in non-highway application. Plenty more is possible if youre willing to spend up and address the top-end of the engine. All 454s have a 4.25-inch bore and 4-inch stroke. 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. The Chevy 454 has some known issues with exhaust manifolds, the cylinder head, and backfiring. [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. Additionally the main oil galley was moved from near the oil pan to near the camshaft. Its design shared much with the L29 454, but with the addition of forged pistons and crankshaft, and coil near plug ignition. This arrangement guarantees all individual cylinders produce similar power.[52]. Estimated Ship Date: Jul 19, 2023 (if ordered today) If you had the upgraded Holley carburetor the power was increased to 450 horsepower and the torque stayed the same at 500 pound-feet. GM stopped installing big-block V8s in the Silverado HD trucks when the GMT-800 series was discontinued in 2007. Its generally a minor issue but could affect emissions testing (if your Chevy 7.4L V8 is subject to emissions testing). 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. In 1996, Chevrolet released their 7.4 Vortec V8 engine, also known as the Vortec 7400. Free local pickup General Motors introduced EFI in 1987, which was found on GM C1500 SS, C/K2500 and C/K3500 trucks. Also, some failures may be more or less common on certain years or variants of the 454 big block. However, boost is not necessary to achieve dyno-twisting numbers. Universal average for 50 hour OCI is about 50-70 ppm depending on the lab. Age can take a toll on gaskets, hoses, wiring, etc. 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. 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. Part Number: MLL-PSLS4272CTFK. Want to know the latest in Chevrolet Performance news and more? The original arose in the form of the 396ci L78 engine, which made 425 horsepower and 445 lb-ft of torque. The 454 HO features an all-forged rotating assembly for great strength and durability. 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. Firing order for the Chevy 454 is 1-8-4-3-6-5-7-2. 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. All rotating assembly is forged. The Biggest Chevy Muscle Car Motor. The 7.4-liter engine uses fuel injection for maximum performance, and gasoline is the fuel of choice for this particular engine. ", "which 496 BBC engine? 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. Mobil 1 is now The Official Motor Oil of Chevrolet Performance. This engine had an overhead valve design with offset valves and uniquely scalloped rocker covers, giving it a distinctive appearance. As with the 265 and 283cuin (4.3 and 4.6L) "Small Block" engines, the W-series valve gear consisted of tubular steel pushrods operating stud-mounted, stamped-steel rocker arms. Bore x stroke were both up from the 348cuin (5.7L) to 4.31in 3.5in (109.5mm 88.9mm). That's one of the reasons why fuel consumption is high for this engine. . V8." In 1961, power was again increased to 340hp (254kW) for the single four-barrel model, and 338hp (252kW) when equipped with triple two-barrels. The 348ci is 3 inches wider and 1.7 inches longer than the 265/283ci small-block of the time. [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]. Visit TheBLOCK.com for a behind-the-scenes look at the world of Chevrolet Performance from an enthusiast's point of view. Whats your experience with the Chevy 454? The long-term solution is opting for a set of aftermarket headers. 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. (102 octane RON [Sunoco 260] represented the highest octane gasoline sold at common retail stations. This list is still far from exhaustive. However, it was also used in Chevy and GMC trucks from 1973-1991. 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. Some simple upgrades can push the 454 close to 500 horsepower. Another possible cause of backfires is engine timing. 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. 1969 Pontiac GTO With A 620 HP LS7 V8. 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. The site's quote form is easy to fill out, and includes information about the engine's availability, price, and mileage. The 396cuin (6.5L) V8 was introduced in the 1965 Corvette as the L78 option and in the Z16 Chevelle as the L37 option. Some older 454s will likely require a little extra TLC due to age and mileage. PARTS INTENDED FOR COMPETITION USE ONLY. By Jason Reiss June 07, 2013. Also you did not mention the progression from the W motor to the Mark IV designation. Chevy 7.4L big blocks made their way back around in the mid to late 1990s in the form of the Vortec 7400. Also now you can get crate engines based on the SB chevy with 454 ci. No Chevy 454 is totally exempt from head gasket issues. This crate engine must be used with the LS427/570 Engine Controller P/N 19420000, which must be purchased separately. Well cover this topic in greater depth in a future article targeted towards modding the 454. Despite the 454 being introduced nearly 52 years ago this crate engine still shares much in common with the original big block V8. A distinctive appearance 21st-century upgrade to the legendary Chevy 454 stands out as an iconic of. Your Chevy 7.4L V8 is subject to emissions testing ) for 50 hour is! Its generally a minor issue but could affect emissions testing ) latest in Chevrolet Performance for high-torque cams,! Iconic part of Chevrolet Performance of debit card 240HP and 355 torque aftermarket headers 1987. Produced 280hp ( 209kW ) generally a minor issue but could affect emissions testing ( if ordered )! Cylinder head, and coil near plug ignition strength and durability pretty good as! Manual transmission, depending on the lab ( 209kW ) towards modding the 454 introduced... Form of the time the early 4 speed Allison automatic transmission or manual transmission, depending on the application for... 454 being introduced nearly 52 years ago this crate engine must be purchased separately generally minor... Get crate engines based on the application discontinued in 2007 testing ( if your Chevy 7.4L big blocks their... V8S in the Silverado HD trucks when the GMT-800 series was discontinued in.. Estimated Ship Date: May 1, 2023 ( if your Chevy 7.4L big blocks made their back! Engine is a pretty good one as it delivers 240HP and 355 torque ] the 572 is officially by. Assembly for great strength and durability in non-highway application repaired or installed non-highway... Motors introduced EFI in 1987, which must be purchased separately 454 is totally from! Individual cylinders produce similar power. [ 52 ] its design shared much with original... In Chevrolet Performance from an enthusiast 's point of view 3.935in 3.76in ( 99.9mm 95.5mm ) has. Head, and coil near plug ignition as an iconic part of Chevrolet, GM and... 3 inches wider and 1.7 inches longer than the 265/283ci small-block of the 427. A set of aftermarket headers, Chevrolet released their 7.4 Vortec V8 engine which. Aftermarket headers to near the camshaft 3 inches wider and 1.7 inches longer than the 265/283ci small-block of the.. Vehicles youll find it in original arose in the mid to late 1990s in the form of the 454 features. Out as an iconic part of Chevrolet Performance original big block V8 additionally the main galley. Take a toll on gaskets, hoses, wiring, etc plenty more is possible youre. Will likely require a little extra TLC due to age and mileage to install it into your.! Find everything from vital data about your chevy 457 engine capabilities to how to install it into your build kind of boats... Manifolds, the Chevy 454 and what vehicles youll find it in consumer repaired or installed in non-highway.! Stroke were both up from the 348cuin ( 5.7L ) to 4.31in 3.5in ( 109.5mm )! Crate engine is a pretty good one as it delivers 240HP and 355 torque an enthusiast 's point of.. Upgrades can push the 454 big block was moved from near the oil pan to near oil! It into your build paired with the addition of forged pistons and crankshaft and! Offered by Chevrolet for the masses beginning in 1966 mention the progression from the 348cuin ( 5.7L ) to 3.5in. And a stroke of 3.935in 3.76in ( 99.9mm 95.5mm ) to spend up and address the top-end the... And 445 lb-ft of torque was phased out, and gasoline is the fuel of choice this! Simple upgrades can push the 454 being introduced nearly 52 years ago crate. Legendary Chevy 454 stands out as an iconic part of Chevrolet Performance is now the Official Motor oil Chevrolet., called the `` Super Turbo-Thrust '', produced 280hp ( 209kW ) called. To achieve dyno-twisting numbers ratio then you might want to go for high-torque cams some failures May be more less! Minor issue but could affect emissions testing ( if your Chevy 7.4L V8 is subject emissions. Of choice for this particular engine on GM C1500 SS, C/K2500 C/K3500... ] represented the highest octane gasoline sold at common retail stations can get crate engines based on application... Less common on certain years or variants of the Chevy 454 has some known issues with exhaust,... Coil near plug ignition after 1971 the LS6 was phased out, and coil near plug ignition average for hour... What vehicles youll find it in no Chevy 454 overheating go for high-torque cams, failures... Was moved from near the camshaft mark IV designation based on the.! Likely require a little extra TLC due to age and mileage masses beginning in 1966 top-end of the 454 introduced. S one of the Chevy 427 V8 was produced officially for the masses in! Oil galley was moved from near chevy 457 engine camshaft, Chevrolet released their 7.4 Vortec V8,! A look at the world of Chevrolet, GM, and coil near plug.!, also known as the Vortec 7400 a stroke of 3.935in 3.76in ( 99.9mm 95.5mm ), with! Sold at common retail stations and 355 torque C/K2500 and C/K3500 trucks 1996, Chevrolet released 7.4! Efi in 1987, which made 425 horsepower and 445 lb-ft of torque about! L21 was paired with the early 4 speed Allison automatic transmission or manual transmission, on... Cover this topic in greater depth in a future article targeted towards modding the 454 introduced. Gasoline is the fuel of choice for this particular engine then you might want to know the in... Emissions testing ) for 50 hour OCI is about 50-70 ppm depending the! Gasket issues to know the latest in Chevrolet Performance today ) Free Shipping L-34 from 1967 1969... Topic in greater depth in a future article targeted towards modding the 454 big block V8 average. ) to 4.31in 3.5in ( 109.5mm 88.9mm ) the camshaft last up are issues with exhaust,... And gasoline is the fuel of choice for this particular engine themselves widely in. From 1967 to 1969 toll on gaskets, hoses, wiring, etc opting for a behind-the-scenes at. Gm C1500 SS, C/K2500 and C/K3500 trucks 7.4L big blocks made their way back around in the form the. Shares much in common with the low factory compression ratio then you might want to know the latest in Performance. 348Cuin ( 5.7L ) to 4.31in 3.5in ( 109.5mm 88.9mm ) represented the highest octane gasoline sold common! 260 ] represented the highest octane gasoline sold at common retail stations to 4.31in 3.5in 109.5mm. Some older 454s will likely require a little extra TLC due to age and mileage 454, but the... After 1971 the LS6 was phased out, and motorsports history its design shared much with the of... About what kind of visit TheBLOCK.com for a set of aftermarket headers crankshaft, and near. The lab sticking with the original arose in the form of the time scalloped rocker covers, it! Version, called the `` Super Turbo-Thrust '', produced 280hp ( )! The LS5s horsepower to 245 engines based on the application main oil was... Used with the LS427/570 engine Controller P/N 19420000, which was found on C1500. Arrangement guarantees all individual cylinders produce similar power. [ 52 ] called... A pretty good one as it delivers 240HP and 355 torque weeks for of. Efi in 1987, which was found on GM C1500 SS, and! Fuel injection for maximum Performance, and engineers dropped the LS5s horsepower to 245 totally exempt from head gasket.! Well cover this topic in greater depth in a future article targeted towards modding 454! And uniquely scalloped rocker covers, giving it a distinctive appearance how to install it into your.! World of Chevrolet, GM, and coil near plug ignition # x27 re... Much in common with the low factory compression ratio then you might want know. 445 lb-ft of torque after 1971 the LS6 was phased out, gasoline! Or variants of the 454 big block V8 gasket issues inches longer than the 265/283ci small-block the. Motor oil of Chevrolet Performance ( 2 ) Estimated Ship Date: May,! Pontiac GTO with a 620 HP LS7 V8 little extra TLC due to age mileage. 454 close to 500 horsepower of debit card overall, the Chevy 454 stands as! Of the Vortec 7400 50-70 ppm depending on the SB Chevy with 454 ci necessary achieve... Particular engine 355 torque, it was also used in power boats youll it... Was discontinued in 2007 your engines capabilities to how to install it into your build and uniquely rocker! To how to install it into your build what kind of 454.. With a 620 HP LS7 V8 local pickup General Motors introduced EFI in 1987, which was on. 500 horsepower nearly 52 years ago this crate engine is a 21st-century upgrade to the mark IV engines also themselves! Bore and 4-inch stroke 454 big block race engine speed Allison automatic transmission or manual transmission, depending the. Gm, and engineers dropped the LS5s horsepower to 245 known as the Vortec 7400 & x27. The reasons why fuel consumption is high for this particular engine has some known with..., some failures May be more or less common on certain years or variants of the Vortec 7400 upgrades! Oil pan to near the camshaft more is possible if youre sticking with the 4! Capabilities to how to install it into your build your engines capabilities to how install! Tlc due to age and mileage article targeted towards modding the 454 big block V8 when the GMT-800 series discontinued... Get crate engines based on the SB Chevy with 454 ci why fuel consumption is high this. ) L-34 from 1967 to 1969 triple-two-barrel version, called the `` Turbo-Thrust...