![]() ![]() To further increase horsepower, performance-oriented camshaft profiles were developed to allow more air in and out of the cylinders, as well as manage a higher engine speed. 2.5-inch) exhaust system with 3.5-inch chrome tips. ![]() Exhaust is routed through a large diameter (2.75-inch vs. ![]() Exhaust runners allow increased gas flow while maintaining fast catalyst light-off, while adding 12 horsepower over the 5.7-liter engine’s cast manifolds. The intake manifold was designed with larger diameter and shorter runners for higher-speed tuning. Larger-diameter valves and reshaped ports in the heads allow for maximized air flow. Cylinders are honed with torque plates to ensure a truer bore, to reduce friction and increase power.Įngine breathing was increased with new higher-flow cylinder heads, a specially designed intake manifold, and exhaust headers with individual tubes encased in a stainless steel shell, all unique to the 6.1-liter HEMI engine. Compression ratio was also increased to 10.3:1 from 9.6:1, increasing engine efficiency and power. SRT engineers who developed the 6.1L engine achieved more horsepower by adding more cubic inches, increasing the compression ratio, and redesigning the cylinder head, intake and exhaust systems for better flow and increased engine speed.įor more displacement, SRT engineers bored out the diameter of the cylinders in the HEMI by 3.5 millimeters each in order to increase the total displacement to 6.1 liters from 5.7 liters. ![]() When SRT powertrain engineers set out to develop a more powerful HEMI they were mindful of the engine’s heritage, which led to adopting traditional HEMI engine cues including an orange-painted cylinder block and black valve covers. Jefferson Avenue North, Detroit, USA, and Magna Steyr Assembly Plant in Graz, AustriaĦ.1L Engine The 6.1L-liter V8 HEMI made its Jeep debut in the 2006 Grand Cherokee SRT8 which went on sale in January of 2006. Did we miss anything? Please get in touch with us and tell us about it! 2006-2010 Grand Cherokee SRT8 Welcome to the in-depth table on the WK Generation Jeep Grand Cherokee SRT8 dimensions and specifications. ![]()
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