You want power? Indy Cylinder Heads (ICH) can make power, period. ICH has been at the forefront of proven Mopar-power packages for a couple of decades, and that's one of the reasons we decided to check in on them when they were putting together a 542ci torque monster. From the beginning, horsepower and torque were expected to be impressive, but also being able to survive on pump gas was a must. Granted, high horsepower numbers are usually relegated to higher rpm numbers. This time we wanted to see if it could be achieved lower in the rpm range.
We wanted to see if we could build a fairly-high horsepower engine that made peak power at under 6,000 rpm. We know, you can make power under that rpm, but would it be something to brag about? Let me put it this way-we're braggin', really, really loud. Would you believe 613 hp at 5,100 rpm? With the ponies coming in under 5,500 rpm, engine wear and tear is virtually nil. Imagine going down the quarter-mile and short shifting because that's where your power is. Ok, what about torque? Yep, torque moves mass, and this baby can move a lot of it. How about producing 700 lb-ft at 3,900 rpm? No, we didn't stutter. This is a serious thumper.
Keep in mind, simply throwing some aftermarket parts together will not accomplish an engine build like this. Sure, you need good parts, but assembly of those parts and attention to details are also crucial.
MOPAR PROJECT CAR Dyno Results Superflow Dyno Performed at Indy Cylinder Head corrected corrected RPM torque hp 2900 661.6 365.3 3000 653.5 373.3 3100 650.3 383.8 3200 656.8 400.2 3300 659.0 414.1 3400 662.4 428.8 3500 669.0 445.9 3600 678.4 465.0 3700 692.9 488.1 3800 701.2 507.3 3900 702.7 521.8 {{{4000}}} 693.7 528.3 4100 688.5 537.5 4200 676.5 541.0 4300 673.2 551.3 4400 664.8 556.9 4500 667.4 571.9 4600 660.8 578.7 4700 653.9 585.2 4800 657.2 {{{600}}}.6 4900 646.2 602.9 {{{5000}}} 642.4 611.5 5100 633.0 614.7 5200 615.8 609.7 5300 592.7 598.1 5400 579.3 595.6 5500 564.0 590.6 5600 543.6 579.6