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Hagerty Employee

Here is a look at the tricks inside GM’s big 2.7-liter four-cylinder

It's nothing new to see modern engines that are packing more and more technology in smaller and smaller packages. While that typically means smaller displacements, the new GM 2.7-liter inline-4 proves that is not always the case. The go-to four-cylinder engine for many OEMs is a two-liter turbocharged mill, but Cadillac and Chevrolet are now building an engine with almost 150% the capacity along with a unique turbocharger. Here's why.


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Is it just me or would this make a nice crate engine providing a fuel efficient alternative to the traditional SBC.


It would be an interesting swap. I haven't found the overall dimensions but it would be a really sweet swap if it was nice and tidy small.
Intermediate Driver

What is the trade off point between extra cylinders and balance shafts needed to cure four cylinder vibration?


Not personally an engineer, but from what I gather the trade off of the balance shafts is mainly space. With crash test regulations ever more stringent, a smaller engine much easier to get into a chassis that will pass those tests.. Those balance shafts have little downside beside packaging, and that packaging requirement is still smaller than adding additional cylinders--at least at this time.