These Guys Turned A Crate Demon Hemi Into A 1,400-hp Supercharged Monster

In banal form, Mopar's Demon Hemi crate motor makes a healthy 807 horsepower and 717 pound-feet of torque. To beryllium clear, this astir $21,000, 6.2-liter, over-the-counter crate motor is technically called the Hellcrate Redeye Supercharged Hemi. But remainder assured it's the same nonstop powerplant found successful the Dodge Challenger SRT Demon (though not nan gonzo Challenger SRT Demon 170 thoroughfare racer), hence nan Demon crate motor moniker. However, for 1 proprietor of a highly customized Jeep-style truck, apparently 807 horsepower conscionable isn't enough.

Now granted, this Demon crate motor needed a rebuild anyway. Tim Eichorn, proprietor of MPR Racing Engines successful Florida, gave much accusation to Engine Builder Magazine. "It came successful pinch a fewer melted pistons," Eichorn said. "The tuning and substance strategy conscionable weren't wherever they needed to beryllium –- excessively overmuch timing, not capable fuel. In a one-off conversion for illustration this, nan supporting systems are often an afterthought, and it caught up to them."

Instead of nursing nan supercharged Hemi backmost to banal specs, MPR threw an full catalog afloat of high-performance goodies astatine nan wounded agelong block. To start, a stroker crankshaft from Manley increases nan engine's displacement from nan mill 6.2 liters by an unspecified amount. A group of CP forged pistons replaces nan damaged stockers and they're attached to nan crank pinch beefy Manley H-beam connecting rods. That's each good and good, but it's successful nan blower section wherever things really get interesting.

The mill Demon supercharger (featured above) is simply a good portion and tin moreover service arsenic a low-buck way to boosting your Chevy LS. However, erstwhile four-figure horsepower is your goal, it's clip to spell aftermarket. In this case, a larger displacement blower from Whipple is nan limb of choice. Of course, changing nan displacement of nan Demon crate motor arsenic good its boost capacity requires a reset successful nan valve timing section and a civilization crushed camshaft from Comp Cams was selected to beryllium nan brains down that operation.

At nan consequence of going down a method rabbit hole, we won't database each azygous constituent utilized to summation this mill's horsepower by complete 50%, but it's worthy mentioning that MPR Racing Engine's attraction to item is simply a large portion of nan equation. This Demon Hemi underwent a rigorous CNC machining process to guarantee nan artifact and cylinder bores are consecutive and true. 

Once each of nan tuning is complete, this mill is expected to reliably make 1,300 to 1,400 horsepower connected premium pump gas. That's capable horsepower to tally successful nan 8-second scope astatine your favourite 4th mile resistance strip. That said, this motor is going correct backmost into its aged location successful a show-quality thoroughfare motortruck which astir apt won't spot galore — aliases immoderate — 4th mile passes. But what nan heck? It's only money.