SEMA 2012: Wiseco/K1 Show off Cage Pistons, 351 Coyote Stroker Kit

The Wiseco/K1 Technologies team certainly piqued a lot interest at SEMA by showing off an innovated “cage piston” design.

The patented design is said to resist side loading yet offers a stiffer, lighter and stronger part than older, conventional designs. Basically, Wiseco combines the benefits of boxed and full-round designs to keep a low center of gravity towards the pin journal while maintaining stiffness. The design results in 44% less skirt area,which reduces drag and friction, yet can also increase skirt stiffness. Wiseco says the pistons can be manufactured with different skirt designs, including asymmetric or variable strut/skirt configurations.

Wiseco was also on top of the FA20 engine craze, offering a 10.5:1 HD forging for the Subaru BRZ and Scion FR-S.

“It is the only true turbo piston available,” says Wiseco’s Ron Shearer.

In addition, Wiseco showed off a number of new applications for its line of pistons, including a billet piece for the wildly popular Hemi shootout cars. Other pistons new to the lineup include:

  • ProTru Sportsman for LS engines that offers an 11:1 compression ratio with a postive 4cc dome. This piston also features Wiseco’s unique ArmorGlide skirt coating that lowers friction and improve wear resistance. The LS piston also comes with a 1/16-1/16-3/16 ring set.
  • New piston Chrysler small-block with a 13.5:1 compression ratio (+8cc dome), ArmorGlide coating and cut for .043-.043-3mm rings with gas ports.

New applications from Wiseco include, from left, LS, Chrysler small block, Chrysler Hemi and Subaru BRZ/Scion FR-S

On the K1 Technologies side there was 351ci stroker kit for the 5.0-liter Coyote engines. It comes with  a 4340 center-counterweighted billet steel crank with a 4-inch stroke, 5.850-inch H-beam rods, 2818 alloy pistons. With a 94mm bore, the displacement is 347ci and with a 95mm bore the displacement jumps to 351ci.

“Testing has just begun on this new setup but it’s already made over 1,150 horsepower and run 9.0 at 156 mph in JPC’s supercharged shop car,” adds Shearer.

The new K1 Coyote stroker includes billet steel crank, H-beam rods and a choice of 94 or 95mm pistons.


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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. He was the editor of four national automotive magazines, including Chevy High Performance, and has authored hundreds of automotive technical briefings. In covering nearly every type of motorsport, Mike has collaborated with many of racing's top engine builders and factory engineers.
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