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Comp Camps Mopar Hemi Engine Challenge - Mopar Muscle Engine ChallengeLast Year's Recap And This Year's Participants From the January, 2007 issue of Mopar Muscle By Dave Young Photography by Dave Young, Randy Bolig
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We're just weeks away from this year's dyno challenge to be held at the Comp Cams facility in Memphis, Tennessee, and we are eager to see how much power this year's 500-inch wedge engines can make. Will the wedges out perform the Hemis? the engines will be judged from 3,000 to 7,000 rpm, a range most of us at Mopar Muscle feel will favor the wedges. But it's hard to beat Hemi power, so let's review the numbers from last year's challenge. SuperFlow Dyno Results
| Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 324.0 | 548.9 | | 3,500 | 356.6 | 535.1 | | 4,000 | 380.0 | 498.9 | | 4,500 | 476.5 | 556.2 | | 5,000 | 580.7 | 609.9 | | 5,100 | 592.4 | 610.1 | | 5,200 | 605.2 | 611.3 | | 5,300 | 620.1 | 614.5 | | 5,400 | 633.2 | 615.8 | | 5,500 | 643.1 | 614.1 | | 5,600 | 650.7 | 610.3 | | 5,700 | 657.1 | 605.5 | | 5,800 | 665.5 | 602.7 | | 5,900 | 674.6 | 600.5 | | 6,000 | 682.3 | 597.2 | | 6,100 | 688.7 | 593.0 | | 6,200 | 694.4 | 588.2 | | 6,300 | 703.6 | 586.6 | | 6,400 | 713.9 | 585.8 | | 6,500 | 723.6 | 584.6 | | 6,600 | 728.2 | 579.4 | | 6,700 | 724.4 | 567.8 | | 6,800 | 696.8 | 538.2 | | 6,900 | 629.3 | 479.0 | | 7,000 | 626.2 | 468.2 | Combined peak horsepower and torque total: 1344.0 With this year's wedge engines...  With this year's wedge engines waiting to be dyno'd at Comp Cams, we thought we'd recap last year's Hemi challenge. Do you think the wedges will out power the Hemis? Let us know by emailing MoparMuscle@SourceInterlink.com.  J.D. Engine and Machine Jeff...  J.D. Engine and Machine
Jeff Dickey of J.D. Engine and Machine had the highest combined horsepower and torque of any of the participants in last year's challenge. Jeff is also competing this year and predicts even bigger numbers from his wedge entry. Speed-O-Motive August Cedarstrand... Speed-O-Motive
August Cedarstrand of Speed-O-Motive tuned his Hemi to a second place tie when we factored the combined horsepower and torque of his entry in last year's challenge. Speed-O-Motive's B-1 headed wedge entry in this year's challenge should post impressive numbers as well. Speed-O-Motive
| SuperFlow Dyno Results | | Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 283.3 | 495.9 | | 3,500 | 345.6 | 518.6 | | 4,000 | 378.5 | 497.0 | | 4,500 | 481.8 | 562.3 | | 5,000 | 589.1 | 618.8 | | 5,100 | 600.0 | 617.9 | | 5,200 | 611.6 | 617.2 | | 5,300 | 623.0 | 617.4 | | 5,400 | 634.4 | 617.1 | | 5,500 | 645.9 | 616.8 | | 5,600 | 657.8 | 617.0 | | 5,700 | 667.2 | 614.7 | | 5,800 | 675.4 | 611.6 | | 5,900 | 682.9 | 607.9 | | 6,000 | 689.6 | 603.7 | | 6,100 | 694.5 | 598.0 | | 6,200 | 700.4 | 593.3 | | 6,300 | 706.0 | 588.6 | | 6,400 | 711.5 | 583.9 | | 6,500 | 716.2 | 578.7 | | 6,600 | 720.1 | 573.0 | | 6,700 | 721.8 | 565.8 | | 6,800 | 721.4 | 557.2 | | 6,900 | 722.6 | 550.0 | | 7,000 | 722.2 | 541.9 | Combined peak horsepower and torque total: 1341.4Hemi's Only Larry Shepard... Hemi's Only
Larry Shepard of Hemi's Only made an impressive showing when his cross-ram-equipped engine tied the Speed-O-Motive entry for the second highest combined horsepower and torque of last year's challenge. Hemi's Only
| SuperFlow Dyno Results | | Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 328.2 | 556.0 | | 3,500 | 377.3 | 566.1 | | 4,000 | 423.1 | 555.6 | | 4,500 | 523.0 | 610.4 | | 5,000 | 608.7 | 639.6 | | 5,100 | 618.2 | 636.6 | | 5,200 | 627.6 | 633.9 | | 5,300 | 637.4 | 631.6 | | 5,400 | 645.5 | 627.8 | | 5,500 | 654.0 | 624.5 | | 5,600 | 661.9 | 620.8 | | 5,700 | 669.2 | 616.6 | | 5,800 | 675.8 | 611.9 | | 5,900 | 682.1 | 607.2 | | 6,000 | 688.9 | 603.0 | | 6,100 | 694.3 | 597.8 | | 6,200 | 697.8 | 591.1 | | 6,300 | 699.9 | 583.4 | | 6,400 | 699.9 | 583.4 | | 6,500 | 700.1 | 565.7 | | 6,600 | 701.8 | 558.5 | | 6,700 | 701.4 | 549.8 | | 6,800 | 699.9 | 540.6 | | 6,900 | 693.6 | 527.9 | | 7,000 | 687.5 | 515.8 | Combined peak horsepower and torque total: 1341.4Lofgren Auto Specialties ... Lofgren Auto Specialties
Last year's winner was Lofgren Auto Specialties, who made great power and torque with economical parts to clinch the Hemi challenge. This was the only entry last year to use factory cylinder heads, proving that engine building is more about the combination than the individual parts. Lofgren Auto Specialties
| SuperFlow Dyno Results | | Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 286.6 | 501.8 | | 3,500 | 338.6 | 508.0 | | 4,000 | 357.8 | 469.8 | | 4,500 | 446.4 | 521.0 | | 5,000 | 562.3 | 590.6 | | 5,100 | 577.2 | 594.4 | | 5,200 | 590.2 | 596.1 | | 5,300 | 601.8 | 596.3 | | 5,400 | 612.3 | 595.5 | | 5,500 | 622.8 | 594.7 | | 5,600 | 632.2 | 592.9 | | 5,700 | 642.8 | 592.2 | | 5,800 | 653.7 | 592.0 | | 5,900 | 664.2 | 591.2 | | 6,000 | 673.4 | 589.5 | | 6,100 | 680.9 | 586.2 | | 6,200 | 687.7 | 582.6 | | 6,300 | 692.5 | 577.3 | | 6,400 | 697.1 | 572.0 | | 6,500 | 700.8 | 566.3 | | 6,600 | 705.7 | 561.5 | | 6,700 | 711.6 | 557.8 | | 6,800 | 716.2 | 553.2 | | 6,900 | 719.9 | 548.0 | | 7,000 | 725.4 | 544.2 |
Combined peak horsepower and torque total: 1321.7 Muscle Motors Mike Ware of... Muscle Motors
Mike Ware of Muscle Motors fought ignition problems for much of last year's challenge, so we don't know what the true potential of his entry was. Mike did make a good showing though as his entry had very broad power and torque curves. Muscle Motors
| SuperFlow Dyno Results | | Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 283.2 | 495.7 | | 3,500 | 340.3 | 510.7 | | 4,000 | 362.7 | 476.3 | | 4,500 | 469.1 | 547.4 | | 5,000 | 556.0 | 584.0 | | 5,100 | 568.8 | 585.7 | | 5,200 | 579.6 | 585.4 | | 5,300 | 590.5 | 585.2 | | 5,400 | 600.9 | 584.4 | | 5,500 | 610.2 | 582.7 | | 5,600 | 616.2 | 577.9 | | 5,700 | 620.9 | 572.1 | | 5,800 | 623.8 | 564.8 | | 5,900 | 626.4 | 557.6 | | 6,000 | 629.4 | 551.0 | | 6,100 | 632.7 | 544.7 | | 6,200 | 637.6 | 540.1 | | 6,300 | 644.6 | 537.4 | | 6,400 | 652.3 | 535.3 | | 6,500 | 659.1 | 532.6 | | 6,600 | 662.8 | 527.4 | | 6,700 | 664.4 | 520.8 | | 6,800 | 666.2 | 514.5 | | 6,900 | 666.5 | 507.3 | | 7,000 | 665.8 | 499.6 |
Combined peak horsepower and torque total: 1252.2 Indy Cylinder Head Although... Indy Cylinder Head
Although a camshaft issue limited the output of their entry, the guys at Indy made a solid showing with nearly 650 hp and 600 lb-ft of torque. Most of the competitors in last year's challenge used Indy parts of some type on their engines. Indy Cylinder Head
| SuperFlow Dyno Results | | Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 304.3 | 532.8 | | 3,500 | 353.3 | 530.1 | | 4,000 | 382.8 | 502.6 | | 4,500 | 491.3 | 573.4 | | 5,000 | 571.9 | 600.8 | | 5,100 | 581.7 | 599.0 | | 5,200 | 590.3 | 596.2 | | 5,300 | 596.9 | 591.5 | | 5,400 | 602.4 | 585.9 | | 5,500 | 607.1 | 579.7 | | 5,600 | 611.0 | 573.0 | | 5,700 | 614.2 | 565.9 | | 5,800 | 619.2 | 560.7 | | 5,900 | 624.6 | 556.0 | | 6,000 | 628.7 | 550.2 | | 6,100 | 633.3 | 545.2 | | 6,200 | 636.4 | 539.1 | | 6,300 | 640.4 | 533.9 | | 6,400 | 644.4 | 528.8 | | 6,500 | 647.5 | 523.2 | | 6,600 | 649.0 | 516.5 | | 6,700 | 646.0 | 506.4 | | 6,800 | 640.6 | 494.8 | | 6,900 | 630.9 | 480.2 | | 7,000 | 625.9 | 469.6 |
Combined peak horsepower and torque total: 1249.8Mid America Racing Engines... Mid America Racing Engines
David Bruns of Mid America Racing Engines built a very strong running street engine for last year's challenge. Choosing to keep compression at a conservative 10:1 may have limited his peak numbers, but as the dyno chart shows, horsepower and torque curves were very broad for this Hemi. Mid America Racing Engines
| SuperFlow Dyno Results | | Engine RPM | Corrected HP | Corrected TQ | | 3,000 | 301.1 | 527.2 | | 3,500 | 339.5 | 509.5 | | 4,000 | 365.0 | 479.3 | | 4,500 | 455.0 | 531.0 | | 5,000 | 547.5 | 575.1 | | 5,100 | 559.6 | 576.3 | | 5,200 | 570.9 | 576.6 | | 5,300 | 580.1 | 574.9 | | 5,400 | 588.3 | 572.2 | | 5,500 | 596.4 | 569.5 | | 5,600 | 603.3 | 565.9 | | 5,700 | 610.7 | 562.7 | | 5,800 | 616.8 | 558.5 | | 5,900 | 622.1 | 553.8 | | 6,000 | 628.0 | 549.7 | | 6,100 | 634.8 | 546.5 | | 6,200 | 642.7 | 544.4 | | 6,300 | 649.9 | 541.8 | | 6,400 | 655.1 | 537.6 | | 6,500 | 658.3 | 531.9 | | 6,600 | 661.4 | 526.3 | | 6,700 | 664.1 | 520.6 | | 6,800 | 666.0 | 514.4 | | 6,900 | 664.5 | 505.8 | | 7,000 | 661.7 | 503.9 |
Combined peak horsepower and torque total: 1242.6All eight of this year's entrants... All eight of this year's entrants in the engine challenge made the deadline and delivered their engines to our trailer at the Mopar Nationals where they stayed on display for the entire show. While we can't say last year's challenge went off without a hitch, we can say that all the competitors were good sports about the challenge and were eager to help each other out when needed. All the Hemis made impressive power, and there were no catastrophic engine failures to ruin anybody's fun. The folks at Comp Cams were generous hosts, providing lunch each day and giving tours of their impressive Memphis facility to anyone interested. This year's challenge is shaping up to be even more impressive than last year; engine builders have utilized an even wider variety of parts and building techniques for their entries. Remember the contest is based on a combined score of horsepower and torque, divided by the cost of the parts that went into the engine, so the builder who makes the most power won't necessarily be the winner. Last year, it took a blend of stout power combined with an economical parts list to land Lofgren Auto Specialties in the winner's circle. The engine builders in this... The engine builders in this year's challenge enjoyed the show and racing at the Mopar Nationals, but also made plenty of time to discuss their engines, shops, and techniques with interested spectators. This year's dyno challenge should prove to be very interesting as we have a wide variety of parts on the wedge motors entered in the contest. Cylinder heads from Indy, Edelbrock, Bulldog, and Brodix will all be tested on Comp's Superflow engine dyno, and one competitor's engine is even sporting six-pack induction! After the testing is complete, be sure to visit our web site where the challenge results will first be posted. Also stay tuned to future issues as we cover the challenge and also go in-depth into each engine, revealing the builder's power secrets!
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