So if you ask Terry Brown what it takes to make a 578 Horsepower, she might tell you that it would take 578 horses. Yes that might sound a little sarcastic, but since Terry has a sense of humor, and is a horse trainer by trade, we kind of expect something like that. Now, if you ask Darren Tedder--the guy that built her engine, he would put it like this. Start with a Mopar Performance Mega block with bores that measure 4.250-inches, add a set of 7.100-inch Billet connecting rods from Oliver, a 4-1/2-inch stroke Callies crankshaft, and add a set of CP pistons. When finished, you get a 511-inch Hemi. By the way, Darren changed the LSM roller camshaft firing order to 18736542. The Stage V Heads over the cylinders create a 10.0:1 compression ratio. It takes an Indy Cylinder Head intake and an 1150 Dominator to feed it the required amount of go-go juice, and a set of tti headers with 2-1/4-inch primary tubes and 4-inch collectors exiting the spend food through a 4-inch exhaust with Dynomax mufflers.
So if that's what it takes to make the power, what does it take to get it to run down the track in a really short period of time? To do that, you need things like a very strongly built 727 followed up with a Dana 60 with a spool, and a set of 4.56 gears.
Although Terry might not have won our AMSOIL/Mopar Muscle Numbers Don't Lie Shootout, she made a great showing.