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GM Turbomax Engine
GM Turbomax engines might be an upcoming series of turbocharged gasoline engines produced by General Motors for use in pickup trucks and SUVs.
Trademark Filing
On January 24th, 2023, GM Authority was first to report that General Motors filed a trademark application with the United States Patent and Trademark Office (USPTO) for the term TURBOMAX. The filing is assigned serial number 97766047 and carries a Goods and Services description of “Engines for motor land vehicles.”
It’s worth noting that the Turbomax name draws certain similarities from the Duramax name that GM uses in conjunction with its family of turbo-diesel engines.
Though it’s unclear what, exactly, the new trademark will be used for, it’s possible that Turbomax may be used in conjunction with a new family of turbocharged gasoline engines. Incidentally, GM Authority exclusively reported in May 2022 that GM is considering developing a new twin-turbocharged six-cylinder gasoline engine to be used in various GM pickup trucks and SUV models.
GM 2.7L I-4 L3B turbocharged gasoline engine
“Big Boy” L3B
If GM does end up moving forward with the development of this new boosted six cylinder, it would likely be similar to the turbocharged 2.7L I4 L3B gasoline engine currently offered in various GM vehicles, including the 2019 and newer Chevrolet Silverado 1500 / GMC Sierra 1500, along with the 2023 and newer Chevrolet Colorado / GMC Canyon. The L3B engine is also used in the Cadillac CT4-V. In its highest-output form, the L3B is rated at an impressive 310 horsepower and 430 pound-feet of torque.
The turbo six-cylinder engine described above would be larger in displacement than the L3B, and therefore more potent. As such, we believe that it would easily be able to deliver numbers that easily surpass 450 horsepower and 500 pound-feet of torque.
Cylinder Set Strategy
If brought to market, the hypothetical turbo-six will be a part of GM’s Cylinder Set Strategy, or CSS, which represents an engine development and manufacturing practice that enables deriving various engines from a similar block and using similar technologies.
