The ZL1 was Central Office Production Order 9560 (COPO) ... it was the most powerful engine GM offered to the public and produced around 500 honest horsepower. ... On paper, horsepower for the ZL1 and L88 was rated at 430 horsepower. The all-aluminum 427 cubic inch ZL1 V8. These Camaro ZL1’s were born to go fast in a strigt line, and would become the most celebrated muscle cars of the era. The ZL1 427-cubic-inch big-block (a NASCAR engine) weighed roughly 100 pounds less than the top 396-cubic-inch big-block engine offered in the Camaro, thanks to its aluminum block and heads. ZL1 (1969) For the 1969 model year the ZL1 option was offered featuring an all-aluminum 427 cu in (7.0 L) big-block engine listed at 430 hp (321 kW) gross, it propelled the ZL1 through the 1/4 mile in 12.1 seconds. The seller calls this the Mexican ZL1, it ran the board and even has bullet holes in the roof! The 1969 ZL1 version of the 427 engine was developed primarily for Can-Am racing, where it was very successful in cars like the McLaren M8B. The ZL1 made its debut on the cover of the December 1968 issue of Hot Rod. Hennessey Performance offers the most powerful engine upgrades for the Chevy Camaro ZL1 to improve 0-60, 1/4 mile and top speed performance. Following the production of exactly 427 ZL1 Anniversary engines, the historic tooling was permanently retired by Chevrolet. ... Based on the famous Chevrolet racing L88 motor which in Corvette form had an iron block and heads, the ZL1 featured a cast-iron sleeved aluminum 427 block with wet-sump lubrication and accommodation for a mechanical fuel pump. The same year marked the very first Corvette produced that incorporated ZL1 427 big-block. 6 Speed Manual. But a brief history lesson isn’t enough to satisfy the cravings for the “Holy Grail” of 427 ci engines. Unfortunately for Ford, though, as nice as the 526-horsepower 2017 Mustang Shelby GT350 is, Chevrolet's ZL1 has the clear, latest advantage in the 50-year Pony Car wars. The ZL1 specifications were nearly identical to the production L88 version of the 427, but featured an all-aluminium cylinder block, in addition to aluminium cylinder heads, which dropped the total engine weight into small-block territory … ALL NEW INSIDE AND OUT HISTORY AND SPECIFICATIONS OF THE NOTORIOUS SPECIAL ANNIVERSARY ZL1 ALUMINUM BLOCK 427. No wrecks, clear title, clean carfax/autocheck. (Use spring P/N 3916164.) Aluminum-block 427 engines (known by Chevrolet enthusiasts as the ZL1) are rare. The 2012 Camaro ZL1 surpasses the advertised power of the legendary 1969 Camaro ZL1's 427 cubic-inch big block by more than 150 horsepower (112 kW) – … The ZL1 did produce 430 horsepower, but it also had a bit more. Actual horsepower for the ZL1 was closer to 525. 427 4BBL HURLEY WITH ALL NEW EXHAUST ALL NEW RALLY HWEELS ON CORRECT BF GOODRICH RADIAL TA'S INCREDIBLE BUILD!!!! HPE offers the best LSA motor upgrades for the 2017 - 2019 ZL1 Camaro. The final version of the ZL1 has unique cast-aluminum valve covers. From GM Parts Direct: 3959180 Mechanical Flat Tappet This mechanical flat tappet is a ZL-1 and LS-7 mechanical lifter competition cam, good in 427-454. Back in ’69 Fred Gibb of Fred Gibb Chevrolet in little LaHarpe, Illinois ordered 50 special COPO (Central Office Purchase Order) ZL1 427/430 horsepower Camaros from Chevrolet. Once you purchase an Anniversary 427 big-block crate engine, you enter a very exclusive club because only 427 of these engines will ever be produced. Factory rated at 290 horsepower, the 302 was actually putting out between 360 to 400 ponies. For non-street use, the 427 ZL1 was built with aluminum blocks and cylinder heads. See all 1 photos. GM routinely low-balled horsepower figures for their cars in the 60s, especially with performance models. If you are thinking about buying what someone claims is a ZL1 or aluminum big-block Chevy engine, have an experienced Chevrolet restorer or mechanic examine the engine. The first 427 engines gave 430 horsepower rating but were often tuned by car owners to hit 500 horsepower. Last month, we published Part one of a series covering the history of the late-’60s’ legendary 427 cubic-inch big-block, and compared them with the modern day ZZ427. Build your own ZL1-powered supercar and experience the raw horsepower and tremendous torque of the Chevrolet Performance ZL1 Aluminum Engine Big Block. The 427, which arrived for 1966, had larger 4.251-inch bore and was available in eight different RPOs: L36, L68, L71, L72, L88, L89, LS1, and the ZL1. Known as RPO L88, this was a very hot version of Chevrolet's own '427' big block engine. ~~~Please Read Description~~~I UPLOADED THIS FOR MY DAD, I KNOW NOTHING ABOUT THE CAR. For 2018, they’ve made the ZL1 even better with the availability of the 1LE Extreme Track package (pictured … Officially, the Zl1 427 Copo Camaro was rated at 435 horsepower, independent dynos discovered it could top 500. It also produced way more power, officially making 430 horsepower at 5200 rpm. All specifications, performance and fuel economy data of Chevrolet Camaro SS-427 Sport Coupe 425-hp 4-speed (317 kW / 431 PS / 425 hp), edition of the year 1969 since September 1968 for North America U.S., including acceleration times 0-60 mph, 0-100 mph, 0-100 km/h, 0-200 km/h, quarter mile time, top speed, mileage and fuel economy, power-to-weight ratio, dimensions, … Only 427 units of the Anniversary 427 will be produced and go on sale in the first quarter … In 2017, Chevrolet brought the Camaro ZL1 back from a short hiatus with a massive 650-horsepower engine under the hood to contest the Dodge Challenger Hellcat and Ford Mustang Shelby GT350. But Gibb had bitten off more than he could chew. The engines were overseen by legendary GM engineer Zora Arkus Duntov in a room he described as "Surgically Clean". This old-school big-block churns out more power than you might think. Hennessy mods for the ZL1 Camaro improve power, torque, horsepower and acceleration. 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