Kaase 520 c.i. Boss Hemi – Heart of a Champion!

We’ve received the first glimpse of the mammoth motor that will power the 2010 Grand Prize Giveaway Boss Snake. It’s the 520 cubic inch Ford Boss Hemi from Jon Kaase Racing engines in Winder, Georgia. The photo below is the actual motor that will be shoehorned into the Boss Snake which is currently under construction at RPM Motorsports in Warrendale, PA.

No stranger to performance awards, Kaase and his team have won the Jeg’s Engine Master’s Challenge presented by Popular Hot Rodding Magazine four times! The massive hemi will be on display next week at the PRI show in Orlando, Florida inside the Kaase Racing Engines booth (booth # 5336).

Kaase’s modern Boss Nine combination is based on a high-nodular cast iron cylinder block that can accommodate 429, 460, 521, or 600 cubic inches and output extends from 500 to1,000 streetable horsepower. Kaase allows that displacement beyond 521 cubic inches include a race-oriented cylinder block equipped with 4-bolt main bearing caps.

The 10.30-inch deck height block receives a cast crankshaft in the 460ci version (600hp). Engines with 521ci and beyond are founded on a 4340 steel crankshaft joined with 4340 forged connecting rods and Diamond forged pistons. For complicity with pump gas, the compression ratio is usually limited to 11.0:1 or less. Kaase caps the short-block with new aluminum cylinder heads fitted with stainless steel swirl-polish 2.30-inch intake and 1.90-inch exhaust valves activated by WW Engineering 1.75:1 aluminum roller rocker arms.

Though the rather large round intake, D-shaped exhaust ports, and marginal cam specs of the original 429 hampered low-speed response, the multiple cam phasing applied to Kaase’s Boss Nine engines has completely eliminated this problem. Customers also have the option of a hydraulic or solid roller camshaft. Bear in mind that the 521ci version produces approximately 770 horsepower and 730 foot-pounds of torque with a hydraulic roller cam. Boss Nine engines are fitted with a single-plane intake manifold for a 4150 or 4500 style carburetor.

The Boss Snake Giveaway Car will debut this spring! Make sure you fill out your Sunday Lucky ticket at any 2010 National event for your chance to win the car! Click here for the official giveaway rules.

For more information on Jon Kaase Racing Engines, visit his website www.jonkaaseracingengines.com

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