Crate Engines, Pro Series Chevy LS 427 C.I.D. The first major update to the Chevrolet 7.4L big block engine came in 1987 with the switch to EFI. GM ASEP technicians can earn their degree in as little as 2 years, kick-starting a fulfilling career in the automotive industry. The ZL1 engine also featured a lightweight aluminum water pump, a camshaft that was slightly "hotter" than the L88's, and a specially tuned aluminum intake manifold. 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. 575lb or 261kg dressed). For 1970, the Big-Block was expanded again, to 454cuin (7.4L), with a bore x stroke of 4+14in 4in (108.0mm 101.6mm). 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). 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. The models most likely to have the 454 are early 1970s Camaro and Chevelle SSs, Corvettes, Monte Carlos and Chevrolet/GM trucks. Westech Performance made 560hp and 530 lb-ft with just this package. 409ci: The 409 was introduced at 360 hp . Its lighter and more compact than an original Big-Block 454. The Engine VIN Number is the last 6 or 9 digits of the vehicle's VIN number. These conditions are more common in trucks or RVs using the 454 big block V8. The first iteration of the W-series engine was the 1958 "Turbo-Thrust" 348-cubic-inch (5.7L), originally intended for use in Chevrolet trucks but also introduced in the larger, heavier 1958 passenger car line. Find everything from vital data about your engines capabilities to how to install it into your build. Click for more details. 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. There were 3 different variations of the 454 that came onto the drawing board at GM during the 70s; the LS5, the LS6, and the LS7 which . Introduced in 1996, it was produced for five years, until replaced by the Vortec 8100. Mobil 1 is now The Official Motor Oil of Chevrolet Performance. If you had the upgraded Holley carburetor the power was increased to 450 horsepower and the torque stayed the same at 500 pound-feet. Chevy 7.4L big blocks made their way back around in the mid to late 1990s in the form of the Vortec 7400. It produced 325hp (242kW). Period magazine tests of the ZL1 were quite rare due to the rarity of the engine itself. PARTS INTENDED FOR COMPETITION USE ONLY. There is speculation over whether this engine actually put out 450hp (336kW) gross, or if this was a marketing oversight that was later corrected. To provide clearance for that long-stroke, engineers modified both the block and the connecting rods. They are also more reliable than you might think. You may also hear ticking sounds, smell raw exhaust, or notice a slightly louder/raspier engine note. Proformance Unlimited's Chevy 454 with 500 HP big block engine which delivers an extremely high amounts of torque. Finally, it ceased being available on passenger cars after the 1976 model year. Additionally, Chevy 7.4L heads are heavy and dont offer great flow. Also the valvetrain became non-adjustable and the provisions for a mechanical fuel pump were eliminated. The engine was underrated and exact stats are hard to find, but it could go well over 500 horsepower with the right upgrades. In 1970, GM pushed the performance bar higher with the introduction of the Chevy 454 V8. Pre-Owned. The ZZ632/1000 crate engine is slated to be on display at the 2021 SEMA Show in Las Vegas, November 25. It had a forged steel crankshaft. Also, some failures may be more or less common on certain years or variants of the 454 big block. From the 1950s through the 1970s, each GM division had its own V8 engine family. 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. 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. 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 . While this option produced no power advantage, it did reduce engine (and hence, vehicle) weight by roughly 75 pounds (34kg). Julybien Atadero writes from the island of Cebu covering various automotive topics including new sports cars, classic muscles, pickup trucks and SUVs. The big-block Chevy goes by many names - the Rat, the Porcupine, and if you go back far enough, the semi-hemi. Well cover this topic in greater depth in a future article targeted towards modding the 454. Yet it survived to become a workhorse and father of the 8.1-liter 8100 Vortec V-8. SAE Transactions, Volume 67 (1959), 104-105. Unfortunately, after 1971 the LS6 was phased out, and engineers dropped the LS5s horsepower to 245. It also made its way into the popular 1990-1993 Chevy 454 SS. "Engineering the 'W' Engine--Chevrolet's 348-cu-in. 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. This engine combination would be outstanding in your car, street rod, truck, 4X4, or marine application. Overheating is most common on trucks and RVs with the 7.4L V8 due to higher engine loads. 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. Additionally the main oil galley was moved from near the oil pan to near the camshaft. 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]. 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. All 454s have a 4.25-inch bore and 4-inch stroke. The Vortec 7400 L29 7.4L (454cuin) V8 was a truck version of the Chevrolet Big-Block engine. However, after the year 2000, it was only found in heavy-duty trucks and RVs. It's a naturally-aspirated, 632cuin (10.4L) V-8; producing 1,004hp (749kW) and 876lbft (1,188Nm) of torque. Furthermore, it boasts a 116-degree lobe separation angle. Backfiring is an interesting problem on the 7.4L V8. Again, our primary focus is the original 454 but well circle back to the later variants including the currently available crate engine. Product Warranty. Hand-assembled at the Performance Build Center in Bowling Green, KY, Chevrolet's LS7 crate engine (LS-Series Small-Block V-8) can provide 505 hp of max output at 6,300 rpm and 470 lb.-ft. of peak torque at the same rev figure. However, no engine is perfect and there arent any exceptions here. Its certainly best known for its stretch in muscle cars of the early 70s. ): 0.648 intake / 0.648 exhaust, Camshaft Duration (@0.050 in. By Jason Reiss June 07, 2013. 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. Look for any tags in the engine compartment or the trim tag located on the fire wall . Good simple review. This engine was superseded by the 409cuin (6.7L) as Chevrolet's top performing engine in 1961 and went out of production for cars at the end of that year. 427cuin (7.0L), available in 1962 and 1963. 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. Vortec 8100s were built at GM's Tonawanda Engine plant while the engine block and cylinder head were cast at Saginaw Metal Casting Operations. My big block is a #140154445, a truck block from 78-90(?) The Chevy 454 big block V8 is an exciting engine with lots of history. This camshaft also features a 227-degree intake and 242-degree exhaust duration. Meanwhile, the LS6 in the Chevelle could deliver up to 450hp with the 4 barrel carb. 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. The engine was much the same up until 1987 when Chevy added EFI. 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 has a bore and a stroke of 4.56in 4+38in (115.8mm 111.1mm). 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. The 7.4-liter engine uses fuel injection for maximum performance, and gasoline is the fuel of choice for this particular engine. A "Special Turbo-Thrust" further upped the power output to 305hp (227kW) with a single large four-barrel carburetor. which dropped the total engine weight into small-block territory (approx. Free local pickup It had a dry weight of approximately 665 pounds (302kg), depending on the type of intake manifold and carburetion systems present. [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. However, long before the LS1 was introduced, GM used the LS designation for the family of 454 big-block engines. In 1970 the LS5 and LS6 454 big-block V8 engines became available to the public in various GM vehicles. Consistent bore and stroke over the years mean that parts are interchangeable, and a whole host of aftermarket parts are available. 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. [14] The engine was available through mid-1965, when it was replaced by the 396cuin (6.5L) 375hp (280kW) Mark IV big-block engine. 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. Its best known for its use in the 1970-1974 Corvette, but its also popular in the Caprice, Chevelle, and El Camino of the same era. It was available from 1958 to 1961 (through 1964 in trucks). The engine had a relatively short lifespan, having its horsepower cut in half by the mid-seventies over new emission . 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. The best place to buy a Chevy engine is the internet. 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. Some simple upgrades can push the 454 close to 500 horsepower. 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