Last year General Motors introduced their 2017 Chevy Camaro to the market. The Camaro featured a redesigned and aerodynamically tuned body, new front bowtie fascia, track tuned suspension and updated interior. GM mated a eight speed automatic transmission to the four and six cylinder versions of the Camaro, while V-8 powered 1SS and 2SS versions received six-speed manual transmissions. In early 2016 Chevrolet introduced a supercharged version of their permier muscle car to a lot of buzz, the Camaro ZL1. The heart of the ZL1 is GM’s supercharged LT4. This high output powerplant is a 6.2 L (378 cu in.) V-8 that cranks out 650 horsepower at 6400 RPM and 630 lb-ft of torque at 3600 RPM. The Camaro’s LT4 is also used in the Corvette Z06 starting with the 2015 model year as well as the Cadillac CTS-V starting the following year. The Camaro’s LT4 uses a 1.7 L Eaton TVS supercharger to force air into the intake at a maximum of 9.4 PSI. It has a bore and stoke of 105.25 mm and 92 mm (4.065 in. and 3.6 in.), respectively, and a compression ratio of 10.0:1, which is higher than normal for a forced induction engine such as this one. Fuel delivery to the engine is accomplished via direct injection.
Chevy incorporated several features into the LT4 engine to strengthen it because of the forced induction such as a specially forged aluminum cylinder head, strong, lightweight titanium valves, and connecting rods that are forged and precision machined. These features assist in weight reduction (the overall engine with heads, block, and supercharger weigh a total of 529 lbs), engine strength, heat tolerance, and noise reduction . The precision machined connecting rods eliminate unnecessary reciprocating weight that could contribute to engine vibration. Unlike the majority of engines in the market today, the LT4 features a pushrod design that reduces engine complexity and weight, and minimizes its height, giving it a lower center of gravity. The 16 valve LT4 has a single camshaft; as a result on-board variable valve timing is nonexistent.
According to Chevy, this compact V-8 is one of the most powerful small-block motors they’ve ever produced. The monster motor gets the 2017 Camaro from 0-60 MPH of a lightning fast 3.5 seconds while getting through the quarter mile in 11.4 seconds at 127 MPH. The LT4 is an incredible engine that forms the beating heart of Chevy’s newest beast of a car. Chevy introduced the 2017 Camaro ZL1 to lots of excitement, and the LT4 is a part of the reason why.