SEMA 2014: Edelbrock Debuts Jeep 4.0L Cylinder Head, V6 Blower

Edelbrock is covering both the traditional and late-model Jeep Wrangler owner with the introduction of a new Performer cylinder head for the venerable 4.0-liter straight-6, and a new E-Force supercharger package for the Pentastar V6.

“This is the first V6 supercharger application for Edelbrock,” says company spokesman Eric Blakely.

Normally, Edelbrock utilizes the Eaton 2300 TVS 160-degree twist four-lobe supercharger for its V8 applications.

Two views of the new E-Force supercharger for Pentastar engines in the 2012-2014 Jeep Wranglers.

“But that was way too big for this engine,” says Blakely. “So, we’re using an Eaton 1320 TVS rotor assembly with our case.”

The E-Force supercharger will fit 2012-2014 Jeep Wranglers. Edelbrock promises a straight bolt-on installation and it’s currently undergoing certification for a CARB EO number. The company also hasn’t finalized power numbers but says there will be plenty of increased torque for towing and off-road performance. One look at the package also says it was designed for look sharp under the hood.

While the E-Force supercharger is quite impressive, the new cylinder head will draw a lot more attention because of the sheer number of Jeep owners with the great 4.0-liter engine. In fact, the biggest question is likely to be: What took Edelbrock so long?

“We didn’t have the capability,” explains Blakely. “It was too long for our foundry, but they finally found a way to fit it into the core box.”

The head is a bolt-on upgrade for the ’91-’06 Wrangler, and it can be used on the ’87-’90 Jeep when used with an intake and header designed for the ’91-’06 vehicle. And it will go as far back as the ’76-’90 models with no modification to the water jacket when used with the later-years intake and header.

Closeups of the new Edelbrock Performer cylinder head for 4.0-liter Jeep Wrangler applications.

The head features intake and exhaust ports with improved air flow and a modern combustion chamber design. Factory valvetrain components can be used along with popular aftermarket accessories. For improved durability, the head features larger, reinforced rocker bosses , 3.4-inch thick deck and Heli-Coil threaded inserts in the intake manifold holes.

“This head will really go on stroker engines,” says Blakely.

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About the author

Mike Magda

Mike Magda is a veteran automotive writer with credits in publications such as Racecar Engineering, Hot Rod, Engine Technology International, Motor Trend, Automobile, Automotive Testing Technology and Professional Motorsport World.
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