These engines were originally rated at 345 hp at 5,600 rpm and 370 lb-ft of torque at 3,600. The pistons were upgraded to the lightweight flat-top Mahle design with metric rings used on OE LT4 engines, boosting compression to 10:1. Output wise, the LSA crate engine makes 556 horsepower at 6,100 rpm and 551 pound-feet of twist at 3,800 rpm. It cranks out 640 horsepower at 6,400 rpm and 630 pound-feet of twist at 3,600 rpm. The ZZ6 crate engine from Chevrolet Performance combines the modern conveniences of electronically-controlled fuel injection with the versatility and classic styling of the proven 350 small block Chevy. The production plants were now set up for one-piece rear main seal blocks; roller cams, guided rocker arms, and center-bolt valve covers; they were no longer capable of producing and assembling original LT1 or L82 high-performance engines. The follow-on ZZ1s and ZZ2s were very similar to the original ZZZ, except for a second-design piston that featured "off-center" pins to quiet the nasty cold-start, piston-slap problem. Instead, the new mill was a real carbureted hot rod engine that blended the best of old and new technology. The ZZ6 also uses an aggressive hydraulic roller camshaft that supports the engine's high-rpm airflow capability while maintaining excellent low-speed drivability. For the ZZ5 GM picked free-flowing GM Fast Burn aluminum cylinder heads evolved from the best of GM LT4 and Vortec technology that had taller, larger intake runners and larger valves. Most of GM’s crate engines are made in Mexico. This V-8 Chevy crate engine packs 455 horsepower at 6,000 rpm, five horsepower less than the regular LT1, but the same amount of torque, namely 465 pound-feet at 4,600 rpm. As originally configured, the engine had four-bolt mains, a forged one-piece rear main seal crankshaft, L98 Corvette aluminum cylinder heads, and a nominal 9.8:1 static compression ratio. The LSA 6.2-liter V-8 is imbued with a 1.9-liter Eaton supercharger, piston-cooling oil jets, and LS3 high-flow cylinder heads, plus a forged steel crank. Your information will be collected and used in accordance with our  Privacy Policy, Exclusive First Look! The ZZ4's upper valvetrain featured an enhanced valvespring package incorporating the lightweight LT4 ovate-wound, 1.340-inch-od single valvespring that upped seat pressure and had even lighter retainers than those used on ZZ3 engines. After 8 hours of researching on 3 of the best crate engines available on the market, we found out that Genuine GM (10067353) 350ci / 5.7L Gen 0 Engine is the … Meet the newest member of the iconic 350-based ZZ engine family—ZZ6! Wether you’re working on your restomod project inside your humble garage or looking to build a mean-ass race car for your racing team, arguably the most important component is the engine. Power and torque ratings remained unchanged. In 1990, you could buy one for about $2,500 at performance dealers like John Elway Chevrolet. A uniquely designed EFI port injection system is integrated onto the ZZ6 EFI and gives the appearance of a carbureted intake. In 2005, an optional "turnkey assembly" was introduced that included everything—even front accessory drives—needed to get the motor up and running. While it’s certainly not the only EFI option on the market, Philippin and the engineering team worked hard to make this particular crate engine unique and ready-to-run optimally right out of the box. Read the vehicle Owner's Manual for more important feature limitations and information. The powerplant delivers a 10.9:1 compression ratio and also features CNC’ed LSX-borrowed aluminum cylinder heads. For 2016, Chevrolet has announced it will replace the ZZ5 with the new ZZ6. Use this crate engine to replace the engine in your 1996 to 2000 model year GM SUV, truck, or van. Find Chevrolet Performance 19351532 Chevrolet Performance ZZ6 350 C.I.D. This cured the ZZ3's occasional valvespring failures caused by that engine's higher acceleration-rate cam profile. Base Crate Engines and get Free Shipping on Orders Over $99 at Summit Racing! GM's ZZ 350 small-block family started and won the crate engine wars between Chevy, Ford, and … At that time, he was too young to know how they worked and way too young to drive them, but he could see one thing – each of them had a different ethos and their own unique personality. We've been throwing cams, intakes, carbs, and other parts at a ZZ5. And in case you’re thinking of using a Chevrolet crate engine, then know the offer can be overwhelming at times. As their name implies, crate engines are complete engines delivered to the buyer in a crate. As time went on, he started seeing that in other cars as well, and his love for the automobile was born. All Rights Reserved, � Copyright TopSpeed. The ZZZ was already becoming well known, so design revisions have maintained a similar engine code ever since. We couldn’t leave the LSA crate engine aside, right? Officially, the ZZ6 is rated at 405 hp at 5,600 rpm and 405 lb-ft of torque at 4,600. Twenty-five years ago, there were no crate engines as we know them today. ZZ1 AND ZZ2 The ZZ3 generated the same peak power and torque numbers as its ZZ forebears, but at a more street-tractable rpm, the peak 345 hp now occurring at 5,250 rpm, with 387 lb-ft on tap at 3,250 rpm. All Rights Reserved, Introducing the $1000 TopSpeed Student Scholarship, The Hoonigans Go Deep With Cleetus McFarland’s Insane ’Vette Kart: Video, Chevrolet Colorado ZR2 Makes Racing Debut At Best in the Desert. The first really significant changes occurred with the late-1992 introduction of the ZZ3. Through 2004 ZZ engines had always been sold as long-block assemblies, leaving it to the consumer to fully dress the motor. The engine was topped off with the factory-style Z28/LT1 aluminum, dual-plane, high-rise intake manifold that accepted standard 4150-type Holley (square-flange) carburetors. The ZZ6 family of crate engines utilizes contemporary valvetrain technology to help with high-rpm capability. Yes, there were and are more powerful and larger crate engines, but no one would go on to build and sell more performance small-block crate motors than GM. Base Crate Engines and get Free Shipping on Orders Over $99 at Summit Racing! Find Chevrolet Performance 19351532 Chevrolet Performance ZZ6 350 C.I.D. A 1.7-liter Eaton supercharger contributes to those figures and the unit can be mated with the T56 Super Magnum six-speed manual, just perfect for that restored classic Camaro restoration you’ve been working on. Javascript must be enabled for the correct page display, Assistant Content Manager - Automotive Expert -. GM's ZZ 350 small-block family started and won the crate engine wars between Chevy, Ford, and Chrysler. Just like the LT1, the LT4 V-8 can also be had with either dry sump or wet sump. As the ZZ engines have long been a foundation for a good-running street engine, we'd like to see how the ZZ5/ZZ6 Fast Burn heads respond to typical hot rod bolt-ons. The 6.2-liter LT5 banger is undoubtedly one of the most impressive GM crate engines money can buy.