The recipe for getting power out of a GM LS block is pretty straightforward: add turbo and hold on. And it is a successful venture, as we’ve seen in just about every form of racing out there. But where is the love for the Chrysler 5.7L Hemi? With a good turbocharger setup and free-flowing exhaust, a Gen-3 Hemi can crank out stump-pulling power just as easily…a couple of years ago Car Craft built up a 2006 5.7 with a turbocharger and went over the 1,000 horsepower mark. But in order to make stout power out of the smaller new Hemi, weaknesses in the rotating assembly must be addressed. The stock hypereutectic pistons don’t have the strength to hold up to a lot of abuse and the connecting rods and crankshaft become failure-prone once you start adding in the power. Even 500 horsepower at the crank is a significant jump from the 340 or so horsepower that these engines were rated at stock, but let’s say that you don’t want to do a ground-up rebuild, but instead just want to beef up what is already there. Modern Muscle Performance is now offering up a solution in the form of a drop-in kit.
The hypereutectics are replaced with a Mahle piston that is proprietary to Modern Muscle, made out of 2618 material. The wrist pin is made out of tool steel. The top ring has been moved down, an accumulator groove has been added between the first and second ring, and Napier oil control second rings are used. The skirts and ring lands are coated, and the pistons put the compression ration between 9.7:1 and 10.2:1, depending on the head gasket used. Molnar rods and ARP bolts round out the package, and upgrades are available, including upgrading from the stock 5.7L crankshaft to a forged 6.1L Hemi crankshaft. But if you wish to keep your 5.7L’s crank, know that the upgraded setup will match the factory specifications for balance, which means that the stock crank does not have to come out for any reason. That means that as long as you keep power down to a pedestrian 650-ish RWHP, you will be good to go in your quest to bury every LS that you come across, my friend.
Modern Muscle Performance: New 5.7L Chrysler Drop-In Pistons And Rods Package
LOL at anyone who thinks they can build a “bulletproof” race engine.
The weakest link always appears as soon as you drop the hammer at the green.