New improvements to the air induction and exhaust systems in the 3.6-liter V-6 engine of the 2012 Cadillac SRX give the crossover the most standard power in its segment.
“When we started planning to equip this vehicle with the 3.6L engine, I challenged our engineers to achieve 300 horsepower and maintain fuel efficiency,” said Liz Pilibosian, vehicle chief engineer. “They came back and exceeded the goal with 308 horsepower.”
Cadillac’s main goal in improving the SRX was to improve the power and responsiveness of the vehicle, but they know that in these times of $4.00 gas they had to improve or at least maintain fuel efficiency as well. Normally these two factors are mutually exclusive, you can have one but not the other. Cadillac has found a way to make it work.
With greater air intake capacity cooler and denser air is available to the engine, which improves power and responsiveness. Cadillac then improved the exhaust system, giving it larger diameter pipes and a higher volume muffler. These improvements pull exhaust gases out of the engine at 1,200 to 3,000 RPM, which means more torque for when you are trying to pass on the highway.
But the more powerful engine brought on another challenge. A 308 horsepower engine can make a lot of noise when it starts revving, and nobody, especially not luxury car buyers, want to be disturbed by the sound of their engine when cruising on the highway (unless you own something that was meant to be heard and enjoyed like a Ferrari or Aston Martin). So Cadillac went back and added more soundproofing materials to the instrument panel, center console, engine compartment and wheel wells.