Mark IV engines also found themselves widely used in power boats. Offer valid 1/1/23 to 12/31/23. (102 octane RON [Sunoco 260] represented the highest octane gasoline sold at common retail stations. Rat-Sized Mouse Motor: Chevrolet's LSX 454 Crate Engine, Chevrolet Performance's LS427/570 crate engine, Swapped! King of the hill in terms of raw power, the LS-7 was intended to be a production engine, but wound up being offered as a 500-hp crate engine (PN 3965774) by Chevrolet Performance. 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. PARTS INTENDED FOR COMPETITION USE ONLY. 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. The 427 became extremely popular due to its versatility and of course massive amounts of horsepower. Like its predecessor, the Mark IV used crowned pistons, which were castings for conventional models and impact extruded (forged), solid skirt types in high performance applications. 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. 19982001 P12 HD Motorhome Chassis. 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. 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 1970 Chevrolet Corvette LS-5 version of this engine was factory-rated at 390bhp (395PS; 291kW) and 500lbft (678Nm), and the LS-6 engine equipped with a single 4-barrel 800cuft/min (23m3/min) Holley carburetor was upgraded to 450bhp (456PS; 336kW) at 5600 rpm and 500lbft (678Nm) at 3600 rpm of torque. Chevy 454 Engine Specs. 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. Warranty valid when all required components are installed on the same vehicle and purchased on one invoice. It was Chevrolets second big block production motor following the Mark I W-series from the late 50s to mid-60s. Mail-in rebate offer not available with other offers. Anyway, the point is that the Chevy 454 has been a prominent engine since its intro in 1970. 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. Want to know the latest in Chevrolet Performance news and more? While the big block V8 offers solid reliability no engine is perfect and there are no exceptions here. For 1959 and 1960, high-output versions of the top two engines were produced with 320hp (239kW) and 335hp (250kW) respectively. L71 + aluminium heads; RPO L89 also applied to L78 "375 HP" 396 engine with aluminium head option. 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. Chevy 454 engine 7.4 V8 91-95 comp engine : Alternative Views: CHEV 454 91-95 COMP ENG Our Price: $ Stock Status:In Stock. ): .510 intake / .540 exhaust, Camshaft Duration (@.050 in. SAE Transactions, Volume 67 (1959), 103. 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. This engine Vin was only federally mandated starting in 1968. The last L18 was manufactured in December 2009. Attached to this crankshaft, was a set of I-Beam forged steel connecting rods, which featured forged aluminum . Vehicle History's team of automotive experts brings you the most accurate and up-to-date used car information. Click for more details. 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. Overheating is most common on trucks and RVs with the 7.4L V8 due to higher engine loads. See gmpartsrebates.com for details, applicable rebate amounts, and rebate form. ): 211 intake / 230 exhaust, Cylinder Heads (P/N 12562920): Iron rectangular port; 118-cc chambers, Valve Size (in. 575lb or 261kg dressed). May 19, 2009 (Edited) The 73 8:1 compression 2 bolt 454 LS4 with the 781 or 049 heads is an ideal engine to modify. The next thing to look out for are various issues with the cylinder head. As a large 7.4L big block engine it also offers tons of aftermarket and upgrading potential. Instead, when issues do arise these are a few of the most common areas. In the SS, the 454 ci motor made 230 horsepower and 385 lb-ft of torque. Some older 454s will likely require a little extra TLC due to age and mileage. Chevrolet 454 big blocks were either LS4, LS5 or LS6 engines. 427cuin (7.0L), available in 1962 and 1963. The first major update to the Chevrolet 7.4L big block engine came in 1987 with the switch to EFI. 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. However, after 2001, the 454 no longer was an option for production GM vehicles. Step 1. 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 Chevy 454 uses a typical old-school V8 design like you'd find on small block engines like the Chevy 350 or Chevy 305. From 1991 the 454 was updated to the new Gen V block, crankshaft and heads. 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. Visit www.chevroletperformance.com/emissions for more details. ", "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! Upgrading and building a powerful big block Chevy are where things get exciting, in our opinion at least. 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. [13] This dual-quad version was immortalized in the Beach Boys song titled "409". 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. As before mentioned, the 454 came in various cars from 1970 to 1975. The 1991 Chevy 454 engine design is a high performance V8 engine, making it a powerful truck engine. The 454 maintained the 427's 4.25 inch bore, but it increased the stroke to 4 inches, and it . *Our primary focus in this article is the original 454 big block engine from 1970-1976. 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). Obviously, the direct issue isnt with backfiring but instead its a symptom of another underlying fault. Unfortunately, after 1971 the LS6 was phased out, and engineers dropped the LS5s horsepower to 245. However, no engine is perfect and there arent any exceptions here. Click for more details. [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. . 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. 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. Unfortunately, there is no evidence from GM that shows 57 cars were built. [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. It started life as a major upgrade from the 348/409 W motor. In 1961, power was again increased to 340hp (254kW) for the single four-barrel model, and 338hp (252kW) when equipped with triple two-barrels. A special 427-cubic-inch (7.0L) version of the 409 engine was used in the 1963 Impala Sport Coup, ordered under Chevrolet Regular Production Option (RPO) Z11. L-34: produced 1970. 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. Additionally, Chevy 7.4L heads are heavy and dont offer great flow. The aluminium body parts were fabricated in Flint, Michigan at the facility now known as GM Flint Metal Center. Its certainly best known for its stretch in muscle cars of the early 70s. L-35: produced 19659, had 10.25:1 compression, Q-jet carburetor, forged steel (1965-1967) or nodular iron (1968-9) crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps. The 454 EFI version was rated from 230hp (172kW) to 255hp (190kW) and from 385lbft (522Nm) to 405lbft (549Nm) of torque. Some of the stores even have warranties, so you can be confident that your new engine will be the best. The Chevy 454 has some known issues with exhaust manifolds, the cylinder head, and backfiring. General Motors introduced EFI in 1987, which was found on GM C1500 SS, C/K2500 and C/K3500 trucks. LS-3: produced 19702, 10.25:1 (1970) or 8.5:1 (1971) compression, hydraulic lifters, nodular iron crankshaft, and two-bolt main caps. The 348ci is 3 inches wider and 1.7 inches longer than the 265/283ci small-block of the time. Chevy 454 Engine Summary. 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. The LS6 was the more powerful variant but it was quickly phased out following 1971. Ranging from common problems info to performance modification guides, we cover everything muscle car. 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. 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. If youre sticking with the low factory compression ratio then you might want to go for high-torque cams. 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. When hes not writing or under one of his project cars, youll often find him producing video and photography for his "Cursed Forever" YouTube channel. L-78: produced 1970. Chevrolet's famous "big-block" 454 V8 was introduced in 1970, and replaced the 427 as the top-dog engine option. As always, though, remember to use our free VIN research tool to inspect a vehicles history before purchasing used. The push rods also acted as conduits for oil flow to the valve gear. In 1971, the LS-5 produced 365hp (272kW) and 550lbft (746Nm), and the LS-6 option came in at 425hp (317kW) and 575lbft (780Nm). 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 initial version of the engine produced 360hp (268kW) with a single 4-barrel Carter AFB carburetor. L88 was rated for 430hp (321kW) at 5200 rpm. The amount of torque that the engine produces is exceptional, and the noise of a 454 is on another level compared to a 350. 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. You can still purchase a 454 big-block V8 crate engine from Chevy themselves, which only confirms its firmly planted legacy. Using Patrick Hale's Power/Speed formula, the 122.15mph (196.58km/h) trap speed indicated low 11-second ET (elapsed time) potential (e.g. However, its generally more common when overheating or running hot for extended periods. I am trying to figure out what the engine id numbers are on my bbc 454. ): 4.185 x 4.125 (106.3 x 104.8 mm), Block (P/N 19260099): LSX cast-iron with six-bolt, cross-bolted main caps, Crankshaft (P/N 19244018): 4340 forged steel with eight-bolt flange, Connecting Rods (P/N 19166964): 4340 forged steel, Camshaft Type (P/N 19166972): Hydraulic roller, Valve Lift (in. 454 big block in a 1970 Chevrolet Chevelle SS. "The 454 uses a cast-iron engine block and aluminum cylinder heads and used this construction throughout its entire production run." 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. Despite its introduction in 1970 the basic design lived on in production cars and trucks through the early 2000s. Quality Used Engines offers an extensive inventory of used engines and has engines available for all popular Chevrolet models. 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. PROPOSITION 65 WARNING. It also comes dressed with great-looking, orange powder-coated valve covers with engraved LSX454 logos. 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. In the next sections well discuss a few of the primary variants of the 7.4L big block V8. This engine had an overhead valve design with offset valves and uniquely scalloped rocker covers, giving it a distinctive appearance. 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. The Chevrolet Corvette with the LS5 version delivered 390hp. Also, some failures may be more or less common on certain years or variants of the 454 big block. 1974 was the last year of the 454 in the Corvette, although the Chevelle offered it in the first half of the 1975 model year. 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. 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. Meanwhile, the LS6 in the Chevelle could deliver up to 450hp with the 4 barrel carb. McNally Institute", "What is the weight of a Chevy 454 engine? High-Performance Cars tested a production line stock, but well tuned, example and recorded a 13.1 second/110mph (180km/h) 14 mile (402m), which correlates quite well with the previously referenced 376hp (280kW) SAE Net figure. Furthermore, there are still plenty of trucks, vans, and SUVs on the streets with the iconic 454 engine rumbling away under the hood. 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. 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. Unfortunately, the raised deck design complicated the use of the block in racing applications, as standard intake manifolds required spacers for proper fit. In all forms (except the aluminum ZL-1), the "rat motor", as it was later nicknamed (small-block engine being a "mouse motor"), was slightly heavier than the W-series model, with a dry weight of about 685lb (311kg). 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. 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. Last up are issues with the Chevy 454 overheating. This engine has a bore and a stroke of 4.56in 4+38in (115.8mm 111.1mm). On the back of the casting I looked for a date, and found "0 2 blob 3". Growing fuel economy restrictions. Visit www.chevroletperformance.com/emissions for more details. This crate engine must be used with the LS427/570 Engine Controller P/N 19420000, which must be purchased separately. What am I to make of these 049 heads on my engine? 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 original arose in the form of the 396ci L78 engine, which made 425 horsepower and 445 lb-ft of torque. You may also want some cooling upgrades if youre planning on building a more powerful Chevy big block. Julybien Atadero writes from the island of Cebu covering various automotive topics including new sports cars, classic muscles, pickup trucks and SUVs. Also the BB weights right at 200 lbs more than the SB chevy. year to help you gain confidence about one of your largest purchase decisions. This later version of the engine is the L19 and features electronic fuel injection (EFI). 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). 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. Hardcore Horsepower Builds 550-horse 87-octane Big-block On a Budget. 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. I know that one it's the other numbers I'm trying to figure out any help is appreciated. Click for more details. With the LSX Bowtie block, weve built a 21st century 454 with our latest technology. Westech Performance made 560hp and 530 lb-ft with just this package. [50], According to Russ OBlenes, the GM director of the Performance and Racing Propulsion Team; This is the biggest, baddest crate engine weve ever built. 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. PARTS INTENDED FOR COMPETITION USE ONLY. 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. ( 2 ) Estimated Ship Date: May 1, 2023 (if ordered today) Free Shipping. ), 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. The 454 evolved from this platform, its improvements allowing for . 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. 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 firing order of older big-block engines is 1-8-4-3-6-5-7-2[60] while Vortec 8100's firing order is 1-8-7-2-6-5-4-3. On the back, where the. Four-bolt main caps and a forged rotating assembly assure strength and durability. Chevrolet Performance has also made the LS427/570 crate engine easier to install by employing an F-body aluminum oil pan and a specific wet-sump oil pump. You can source the 454 HO directly from Chevrolet. It produced 265hp (198kW). Again, the biggest thing is simply keeping up with the cooling system. By Jason Reiss June 07, 2013. The 1991 through 1993 454SS made 255 HP at 4000 TPM and 405 TQ at 2400 RPM thanks to dual 2.5" catalytic converters. Bore x stroke were both up from the 348cuin (5.7L) to 4.31in 3.5in (109.5mm 88.9mm). 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. Many were shared with other divisions, but each design is most closely associated with its own division: GM later standardized on the later generations of the Chevrolet design: Language links are at the top of the page across from the title. So, you can have the big old school engine with a touch of modern amenities, should you so choose. This being the case, parts are very readily available should you need to repair a 454 equipped vehicle. 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. One benefit to the Chevy 454 is the number of these engines that were produced over the years. You have to experience one to know how it . Visit www.chevroletperformance.com/emissions for more details. 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. Furthermore, it boasts a 116-degree lobe separation angle. [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]. It also made its way into the popular 1990-1993 Chevy 454 SS. The compression ratio varies depending on which engine you got. While most 454ci V8s were of a two-bolt main design, a number of four-bolt main LS5s have been recorded. The 1970 LS5 came with 360 horsepower, and the 1970 LS6 came with an impressive 450 horsepower. This resulted in superior vehicle weight distribution for improved handling, although the difference in straight line performance was negligible. Those more serious about modding and with bigger budgets should consider full top-end kits like this from Trick Flow Specialties. The LS-7 was later offered as a crate engine from Chevrolet Performance with an officially rated power minimum of 500hp (373kW) gross. Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles. For 1991 General Motors made significant changes to the Big-Block resulting in the Generation V. The block received a one-piece rear seal and all blocks received 4-bolt mains. Find everything from vital data about your engines capabilities to how to install it into your build. 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. There are a number of different things that cause backfires on the 454. Prior to the 454, Chevy was using the 427, a Mark IV engine that produced 425hp. It had a forged steel crankshaft. The Vortec 7400 L29 7.4L (454cuin) V8 was a truck version of the Chevrolet Big-Block engine. These companies sell used motors at a fraction of their original prices. 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. 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. It was produced through 1964 for use in large Chevrolet trucks. 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. The 1973 LS-4 produced 275hp (205kW) and 468lbft (635Nm), with 5hp (4kW) and 10lbft (14Nm) gone the following year. The oil embargo by OPEC. 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. Bore and stroke was 4+18in 3+14in (104.8mm 82.6mm), resulting in a substantially oversquare design. Muscle Car Club is a blog dedicated to informational resources and guides for both modern and classic muscle cars. Casting number 3999289. If youre looking for more power then the cylinder head is a great thing to address regardless of problems. 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. With its relatively flat torque characteristics, the "W" engine was well-suited to propelling both the trucks and heavier cars that were in vogue in the US at the time. Hardened valve seats further increased reliability and helped allow these engines to last much longer than the earlier versions, even without the protection previously provided by leaded fuel. $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. street-use, racing, etc.are available in stock or modified configurations, as well as with increased deck height to allow for a longer stroke or more favorable rod length ratios, depending on intent, providing the ability to make engines with capacities of 632-cubic-inch (10.4L),[63] 798-cubic-inch (13.1L),[64] and as large as 1,005.8-cubic-inch (16.5L).[65]. With a forged crankshaft and rods, lightweight aluminum heads, four-barrel carb, the L88 is the most power capable of the engines .