An NHRA big-show nitro HEMI mill is the most extreme form of the internal combustion engine on the planet, period. These engines generate well over 10,000 horsepower when things go right — when things go wrong, they turn parts into melted metal confetti. Callies Performance Products’ splined post HEMI crankshaft has been battle-tested in nitro engines and is ready for virtually anything.
In 2016, Callies, in partnership with Kalitta Motorsports, set out to develop a HEMI crankshaft for Top Fuel and Funny Car engines. The cranks started out as billet units while Callies worked on perfecting its new design; this was done as it tried to create a forged crank for this application, since it would be stronger.
“We began looking for someone who could forge the extremely tough EN30B Material. This is not an easy or cheap task when investing in a forging die. This took some time, but we finally found a place that could do it. So, over the past two years, we have machined these cranks quietly in the background working with the Kalitta group. These new units have seen double the crank life when the engine doesn’t eat itself up,” explains Brook Piper from Callies.
Callies has now begun to reach out to other areas of the drag racing world to offer this new crankshaft for different applications. The spline post HEMI crankshafts are currently available in strokes from 4.150-inches, up to 4.750 on this forging die.
“This crank is good for any extreme horsepower HEMI application; it doesn’t matter if it’s a naturally-aspirated engine or one with a big power adder. These cranks have lived in the harshest environment imaginable, so we know they will work for anyone,” Piper says.
You can learn more about these cranks right here on the Callies website.