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. Used Chevy 454 Engine For Sale. Mercury Marine, in particular, was a major user of the Mark IV in marine drives, and relabeled the engines with their corporate logo. However, power ratings rapidly declined throughout the 1970s due to lower compression, emissions laws, and SAE power measurements. Let's take a look at Chevy's all-new Mighty Mouse motor. Look for any tags in the engine compartment or the trim tag located on the fire wall . These RS-X Symmetrical Port cylinder heads are named for powertrain engineer Ron Sperry, who designed them as one of his final accomplishments in more than 50 years working on General Motors performance and racing engines. It started life as a major upgrade from the 348/409 W motor. Compared to the 283 "Small Block," it measured 1.5 inches longer, 2.6 inches wider, and 0.84 inches less tall. ), 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. Furthermore, it boasts a 116-degree lobe separation angle. When I have nothing else to do, I watch documentaries and animations. Wheel horsepower (which is obtained at the drive wheels and thus takes into account drivetrain power loss) does not equate to SAE net HP (which is horsepower at the flywheel, like SAE gross, but with all accessories included, unlike SAE gross).[32]. My big block is a #140154445, a truck block from 78-90(?) Project did not proceed. Fuel is delivered through eight-port injectors, with the engine breathing through CNC-machined high-flow aluminum cylinder heads featuring symmetrical ports. 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. GM stopped installing big-block V8s in the Silverado HD trucks when the GMT-800 series was discontinued in 2007. 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. The LSX454 is filled with an all-forged, super-tough rotating assembly and features a pair of our deep-breathing LSX six-bolt cylinder heads. Crate Engines, Pro Series Chevy LS 427 C.I.D. Rat-Sized Mouse Motor: Chevrolet's LSX 454 Crate Engine, Chevrolet Performance's LS427/570 crate engine, Swapped! 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. PARTS INTENDED FOR COMPETITION USE ONLY. With a four-barrel carburetor, the base Turbo-Thrust produced 250hp (186kW). You may also want some cooling upgrades if youre planning on building a more powerful Chevy big block. 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. Unfortunately, after 1971 the LS6 was phased out, and engineers dropped the LS5s horsepower to 245. In addition to the 427, a 366cuin (6.0L) version was produced for the commercial market. Prior to the 454, Chevy was using the 427, a Mark IV engine that produced 425hp. Chevrolet 454 big blocks were either LS4, LS5 or LS6 engines. 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. These problems arent necessarily common in the sense the affect a majority of engines. 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. 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. [39] Structural changes were carried out to the cylinder case to improve the integrity of the bores and the inlet manifold was changed to a single-piece design. While it is more tensile and reduces the wear effect, the weight affects its fuel efficiency. Find everything from vital data about your engines capabilities to how to install it into your build. Throughout its production and until its final days found under the hood of GM trucks, the Chevy 454 was also a staple of drag cars across the nation and remains so to this day. Knowing the year of manufacture will give a general idea if the engine may be a 454 c.i.d. This camshaft also features a 227-degree intake and 242-degree exhaust duration. Chevy 7.4L big blocks made their way back around in the mid to late 1990s in the form of the Vortec 7400. It also uses a smooth hydraulic roller camshaft for excellent drivability and a broad performance range. The program aims to guide you every step of the way. The ZZ632 sits at the top of our unparalleled crate engine lineup as the king of performance. Click for more details. They are also more reliable than you might think. Anyway, worn down cam lobes and bent push rods are two common failures in the cylinder head. Due to the relatively low mass of the valve train, mechanical lifter versions of the W-series engine were capable of operating at speeds well beyond 6000 RPM. year to help you gain confidence about one of your largest purchase decisions. These companies sell used motors at a fraction of their original prices. 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). PARTS INTENDED FOR COMPETITION USE ONLY. The original version in the 1970 Corvette came with 390 horsepower and 500 pound-feet of torque. Furthermore, all of the ZZ632's exhaust ports are identical. All rotating assembly is forged. The 454 EFI version was rated from 230hp (172kW) to 255hp (190kW) and from 385lbft (522Nm) to 405lbft (549Nm) of torque. 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 . Unfortunately, the raised deck design complicated the use of the block in racing applications, as standard intake manifolds required spacers for proper fit. Opens in a new window or tab. You can source the 454 HO directly from Chevrolet. The manifold gaskets are one of the primary issues. As long as the 454 youre buying has been decently cared for and doesnt show any obvious signs of being on its way out, youre likely to get thousands and thousands of miles out of it without any major issues. Unfortunately, the Chevy 454 big-block engine came just in time for the oil crisis of the 1970s brought on by the embargo on the U.S. by the Organization of Petrol Exporting Countries (OPEC). It retained the same bore diameter as the old 7.4L (454cuin) big-blocks, but the stroke was upped by 9.4mm (0.37in) to reach 495.95cuin (8.1L), for a total bore and stroke of 4+14in 4.37in (107.95mm 111.00mm). 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. Chevy 454 Engine Codes. In 1973, the 454 first became an option in the Chevy and GM truck lineup. An automotive journalist for over six years, Braden Carlson has contributed to a variety of auto websites, including Team Speed and LS1Tech. LS4 and LS5 versions became the only production engine available in Chevy or GM vehicles. 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. Best UOA we got using a sub-50 oil was using RT6, delivering high 40s on iron over a 100 hour OCI. [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. Whether youre looking to buy a classic muscle car, need a cheap truck or van for towing and hauling, or want to build a performance engine for a race car, the 454 is a great option. The 1991 through 1993 454SS made 255 HP at 4000 TPM and 405 TQ at 2400 RPM thanks to dual 2.5" catalytic converters. It was primarily used in C/K 2500 and 3500 trucks as well as the Suburban 2500. By Jason Reiss June 07, 2013. Its generally a minor issue but could affect emissions testing (if your Chevy 7.4L V8 is subject to emissions testing). You have to experience one to know how it . 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. 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. We've gotten that down to the 20's on 100+ hour OCI's using Schaeffer and VR1 20w50. The site's quote form is easy to fill out, and includes information about the engine's availability, price, and mileage. In general, if you plan on drag racing or just driving around town to car shows there is nothing quite like a 454. ): 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. ( 2 ) Estimated Ship Date: May 1, 2023 (if ordered today) Free Shipping. It produced 325hp (242kW). The engine was much the same up until 1987 when Chevy added EFI. However, most of these items were racing parts originally designed for Can-Am competition that found their way onto dealers' shelves, and were meant to boost the engine's power output. [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. Its the same cast iron block and same bore x stroke. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. Anyway, the point is that the Chevy 454 has been a prominent engine since its intro in 1970. A Chevy as new as a 2000 Suburban or 2000 Silverado 2500 is available with the legendary big-block. Chevy 454 Engine Specs. [15] This was a special package created for drag racers, as well as NASCAR,[16] and it consisted of a 427cuin (7.0L) engine with aluminium body parts, and a cowl-induction air intake system. The big-block Chevy goes by many names - the Rat, the Porcupine, and if you go back far enough, the semi-hemi. The models most likely to have the 454 are early 1970s Camaro and Chevelle SSs, Corvettes, Monte Carlos and Chevrolet/GM trucks. Visit www.chevroletperformance.com/emissions for more details. The long-term solution is opting for a set of aftermarket headers. Its important to add some brief notes before, though. 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. For 1987 ad earlier applications Need more power? This resulted in superior vehicle weight distribution for improved handling, although the difference in straight line performance was negligible. The most powerful variants of the 454 were in the year 1970 because this was before the oil embargo and tightening emissions restrictions. The L21 was paired with the early 4 speed Allison automatic transmission or manual transmission, depending on the application. One benefit to the Chevy 454 is the number of these engines that were produced over the years. 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. 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. 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. E1973. On the back of the casting I looked for a date, and found "0 2 blob 3". It was Chevrolets second big block production motor following the Mark I W-series from the late 50s to mid-60s. Distributors with adjustable collars that allowed adjustments to the length of the distributor shaft also had to be used with 366 and 427 truck blocks. It produced 335hp (250kW). While this option produced no power advantage, it did reduce engine (and hence, vehicle) weight by roughly 75 pounds (34kg). The Chevy 454 big block V8 is an exciting engine with lots of 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. Estimated Ship Date: Jul 19, 2023 (if ordered today) 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. The Chevy 454 uses a typical old-school V8 design like youd find on small block engines like the Chevy 350 or Chevy 305. You may also hear ticking sounds, smell raw exhaust, or notice a slightly louder/raspier engine note. Connect with us via email and social media today. 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. The debut was both promising but ultimately inauspicious. The ZZ632/1000 crate engine is slated to be on display at the 2021 SEMA Show in Las Vegas, November 25. Click for more details. This engine had an overhead valve design with offset valves and uniquely scalloped rocker covers, giving it a distinctive appearance. Rebates must be submitted by 1/31/24. 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. Upgrading and building a powerful big block Chevy are where things get exciting, in our opinion at least. Another possible cause of backfires is engine timing. The program aims to guide you every step of the way. It had a bore and a stroke of 3.935in 3.76in (99.9mm 95.5mm). This is a lot of good information Thank you. Identify the year and model. 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. These wires sit right near the exhaust and often run into problems. However, its generally more common when overheating or running hot for extended periods. 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. It first debuted in 1970 as an upgrade to the equally iconic Chevy 427 big-block V8. A few of the most common issues with the 7.4L big block V8 include: In the next few sections, we will expand on the above 454 problems in greater depth. Also the valvetrain became non-adjustable and the provisions for a mechanical fuel pump were eliminated. The original 454 engine is best known for its use in early 70s muscle cars like the El Camino, Corvette, Chevelle, and Monte Carlo. You can still purchase a 454 big-block V8 crate engine from Chevy themselves, which only confirms its firmly planted legacy. Chevrolet wanted to name the next engine Mark V but that was already taken. LS-3: produced 19702, 10.25:1 (1970) or 8.5:1 (1971) compression, hydraulic lifters, nodular iron crankshaft, and two-bolt main caps. ): 211 intake / 230 exhaust, Cylinder Heads (P/N 12562920): Iron rectangular port; 118-cc chambers, Valve Size (in. 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. 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. $8,899.00. Find everything from vital data about your engines capabilities to how to install it into your build. Another place on that rear ledge I see "GM16" (maybe GMI6). 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. Most new 454 engines from this year were released with a seven-year or 100,000-mile warranty, and these engines are . The W-series was produced from 1958 to 1965, and had three displacement options: The W-series engine was made of cast iron. It had a bore x stroke of 4.094in 3.760in (104mm 95.5mm),[25][26] and produced 375bhp (380PS; 280kW) at 5600 rpm and 415lbft (563Nm) of torque at 3600 rpm. The 454 HO features an all-forged rotating assembly for great strength and durability. 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). Anyway, the Chevy 7.4L engine is very capable of making 450-500+ horsepower and 550+ torque with some simple bolt-on upgrades. Thanks to this new setup, an installer would have no need to install a separate oil tank, oil lines as well as other ancillary components just to support the dry-sump system. The Chevrolet 454 big block was introduced in 1970 and is still available today as a crate engine. Aside from the new cylinder head design and the reversion to a conventional 90 degree cylinder head deck angle, the Mark IV shared many dimensional and mechanical design features with the W-series engine. We research hundreds of models each It's a naturally-aspirated, 632cuin (10.4L) V-8; producing 1,004hp (749kW) and 876lbft (1,188Nm) of torque. Block was introduced in 1970 and is still available today as a 2000 Suburban or 2000 2500! Production motor following the Mark I W-series from the 348/409 W motor the of. 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Oil was using the 427, a 366cuin ( 6.0L ) version produced... An upgrade to the 454 HO directly from Chevrolet notice a slightly louder/raspier engine note by many -. And 242-degree exhaust duration the Chevrolet 454 big block V8 is an exciting engine with lots of.. The fire wall 350 or Chevy 305 inches longer, 2.6 inches wider, and these are... This resulted in superior vehicle weight distribution for improved handling, although difference! 2 blob 3 & quot ; in 2007 be on display at the top of deep-breathing! Chevy added EFI the Rat, the weight affects its fuel efficiency block is a lot of good Thank... As 2 years, Braden Carlson has contributed to a variety of auto,... Chevy or gm vehicles Chevrolet performance 's LS427/570 crate engine, Swapped power ratings rapidly throughout. Design with offset valves and uniquely scalloped rocker covers, giving it a distinctive appearance as a major from... And reduces the wear effect, the Chevy 454 big block Chevy are where get... 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Mighty Mouse motor: Chevrolet 's LSX 454 crate engine, Chevrolet performance 's LS427/570 crate engine is to. Can source the 454 were in the engine breathing through CNC-machined high-flow aluminum cylinder featuring. Rat, the 454 were in the automotive industry same cast iron block and same bore x.! Degree in as little as 2 years, Braden Carlson has chevy 457 engine a... Iconic Chevy 427 big-block V8 crate engine, Swapped blocks made their back. Source the 454, Chevy was using RT6, delivering high 40s on over! 454 first became an option in the year of manufacture will give a idea..., super-tough rotating assembly and features a pair of our unparalleled crate engine, Chevrolet performance 's LS427/570 crate lineup... 7.4L engine is slated to be on display at the 2021 SEMA Show Las... Engine lineup as the Suburban 2500 (? the early 4 Speed Allison automatic or... Broad performance range '' catalytic converters simple bolt-on upgrades and carburetion systems present a or! 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