Top 5 Reasons To Choose The TurboMax Engine

Drivetrains for full-size pickup trucks followed a fairly consistent pattern for decades. The base engine would have six cylinders and be considered appropriate for light economical duty. Then, there would be a series of V8s and, more recently, a diesel for serious pickup truck activity. 4-cylinder engines were long considered too small for full-size trucks. But the TurboMax in the Silverado 1500 is ready to break with tradition and expectations. Let Chevrolet of Spring Valley detail Motor Trend’s five reasons why the TurboMax may be just the engine most pickup owners will need.

#1: Powerful and Torquey

Despite its use in Cadillac sport sedans, the TurboMax was designed to be a truck engine. At 2.7 liters, it is rather large for a 4-cylinder, with a disproportionate part of that displacement resulting from a relatively long stroke, which favors torque generation. Add the turbocharger, and you get a standard power rating of 310 horsepower and, more importantly, an astounding 430 lb-ft of torque. You can find plenty of V8s with less torque, and it also outpulls all other standard engines in the full-size truck category. Its closest competitor, for example, the F-150’s twin-turbo 2.7-liter 4-cyl. makes 295 lb-ft and the 2023 Ram 1500 3.6-liter V8 base engine is rated at 271 lb-ft. In addition, the TurboMax reaches its peak torque at a low 3,000 rpm, making it easily accessible.

#2: Dual Volute Turbocharger Technology

The Dual Volute Turbocharger is a significant factor in the TurboMax’s impressive torque production, particularly in comparison to a similarly configured engine like the F-150’s. A volute is a channel bringing exhaust into the turbocharger’s turbine. Because exhaust is pushed out of just one of each cylinder’s four cycles, it comes out in pulses. When the exhaust streams combine, these pulses can cause back pressure, slowing the exhaust flow into the turbocharger. Chevrolet’s trick is to channel the exhaust gasses from cylinders 1 and 4 separately from cylinders 2 and 3. Two separate volutes, thus “dual volute.” Pistons 1 and 4 move in unison, but when cylinder 1 is in its exhaust cycle, cylinder 4 is in the ignition cycle, so the pulses are far from each other. Pistons 2 and 3 are moving opposite to 1 and 4 and are also two cycles from one another. The outcome is the exhaust pulses don’t interfere with each other, resulting in greater flow velocity and an increase in torque production.

#3: Stronger, Quieter, More Durable

The TurboMax’s 4.01-inch piston stroke helps generate low-end torque but the engine is fully prepared to endure everything the combustion chambers throw at it. To receive the downward thrust of the ignition stroke, the crankshaft was stiffened by 30 percent, with forged steel construction for the bottom end. Dual balance shafts counter secondary vibration. 

#4: Fuel Efficiency

The rear-wheel drive TurboMax-equipped Silverado has an EPA-estimated rating of 19 mpg city and 22 mpg highway. Stop/start technology reduces the engine’s idle time when stopped at lights around town. Furthermore, when cruising on a steady highway with a light load, the engine will run on just two cylinders, and yet all its power will be there the moment you need it. The RWD Silverado’s maximum payload with the TurboMax is 2,260 pounds, and it has a maximum trailer rating of 9,500 pounds.

#5: It’s the Standard Engine

This technologically advanced engine is the Silverado 1500’s base engine for most of its trim levels, including the Work Truck, Custom, Custom Trail Boss, LT, RST, and LT Trail Boss. Thus, all this sophistication isn’t anything you will pay extra to own. A few years ago, the Silverado 1500’s previous base engine was a 4.3-liter V6 rated at 285 horsepower and 305 @ 3900 lb-ft of peak torque, making the TurboMax a significant upgrade.

The Turbomax was designed to cover the needs of the vast majority of its Silverado 1500 owners. Of course, you may have specific needs and there are V8s and a diesel engine to meet them. You can find them all at Chevrolet of Spring Valley. Fortunately, now you know not to let the 4-cylinder specification fool you. This is the most powerful base Silverado 1500 engine has ever had, and it just might be the engine for you.