Racing Engine Design
GM LS7

Claimed displacement: 369 ci
Qualifying score: 2,422.8
Team leader: Bret Bowers
Team members: Jason Gonzalez, Bret Bowers
Hometown: Fort Collins, CO
Bore: 4.030-inch
Stroke: 3.622-inch
Compression ratio: 11.34:1
Carburetor: Quick Fuel 1,050 cfm
Intake: Performance Induction
Carb spacer: Wilson
Cylinder heads: GM LS7
Intake valve: 2.200-inch
Exhaust valve: 1.540-inch
Block: GM 6.0L
Camshaft specs: Bullet solid roller, 247/247 degrees at .050, .810-/.810-inch lift
Rocker arms: Harland Sharp, 1.8:1
Lifters: COMP
Pushrods: COMP
Crankshaft: GM truck
Rods: Eagle
Pistons: Mahle
Rings: Mahle, 1.5mm/1.5mm/3mm
Coatings: none
Ignition: MSD
Water pump: Meziere
Damper: PRW
Oil: Mobil 1, 0W-30
Headers: Pace Setter, 1.750-inch primary
Mufflers: MagnaFlow

DYNO DATA
BEST QUALIFYING PULL
RPM TQ HP
3,000 407 232
3,100 410 242
3,200 407 248
3,300 398 252
3,400 392 257
3,500 388 261
3,600 356 266
3,700 388 272
3,800 390 281
3,900 414 296
4,000 432 315
4,100 447 337
4,200 460 357
4,300 470 377
4,400 479 394
4,500 487 410
4,600 490 426
4,700 490 439
4,800 493 450
4,900 490 465
5,000 500 476
5,100 498 484
5,200 499 494
5,300 499 504
5,400 498 512
5,500 498 521
5,600 497 530
5,700 495 537
5,800 492 544
5,900 490 551
6,000 489 559
6,100 485 565
6,200 483 570
6,300 480 576
6,400 474 578
6,500 468 579
6,600 461 579
6,700 452 577
6,800 446 577
6,900 440 578
7,000 433 578

Semco Performance
Pontiac 400

Claimed displacement: 407 ci
Qualifying score: 2,415.1
Team leader: Michael Semchee
Team members: Ray Clayton, Michael Semchee Jr., Kevin Semchee, Michael Semchee
Hometown: Austintown, OH
Bore: 4.156-inch
Stroke: 3.750-inch
Compression ratio: 11.4:1
Carburetor: Demon 1,090 cfm
Intake: Edelbrock
Carb spacer: homemade, 1-inch open
Cylinder heads: Kaufman
Intake valve: 2.250-inch
Exhaust valve: 1.750-inch
Block: Pontiac
Camshaft specs: COMP solid roller, 256/260 degrees at .050, .729-/.706-inch lift
Rocker arms: T&D, 1.75/1.65:1
Lifters: COMP
Pushrods: Trend
Crankshaft: Lunati
Rods: Eagle
Pistons: JE
Rings: JE, .043-inch/.043-inch/3mm
Coatings: Swain
Ignition: MSD
Water pump: Meziere, electric
Damper: PRW
Oil: Royal Purple, 0W10
Headers: CHE, 2.250-inch primary
Mufflers: MagnaFlow

DYNO DATA
BEST QUALIFYING PULL
RPM TQ HP
3,000 425 243
3,100 421 248
3,200 417 254
3,300 418 263
3,400 425 275
3,500 436 291
3,600 453 311
3,700 468 329
3,800 481 348
3,900 492 366
4,000 500 381
4,100 505 394
4,200 507 406
4,300 508 416
4,400 509 427
4,500 510 437
4,600 517 453
4,700 526 471
4,800 531 486
4,900 535 500
5,000 542 516
5,100 550 534
5,200 554 548
5,300 557 562
5,400 558 574
5,500 558 584
5,600 556 593
5,700 553 600
5,800 548 605
5,900 543 610
6,000 538 615
6,100 532 618
6,200 526 621
6,300 518 621
6,400 509 620
6,500 500 619
6,600 490 616
6,700 480 613
6,800 472 611
6,900 464 609
7,000 456 607

TPIS
GM LS1

Claimed displacement: 384 ci
Qualifying score: 2,411.8
Team leader: Clay Witt
Team members: Jim Hall, Scott Parkhurst, Clay Witt, Myron Cottrell
Hometown: Chaska, MN
Bore: 4.100-inch
Stroke: 3.625-inch
Compression ratio: 11.3:1
Throttle body: TPIS
EFI: GM/Howell/TPIS
Intake: Edelbrock Super Victor
Carb spacer: Holley
Cylinder heads: AFR
Intake valve: 2.165-inch
Exhaust valve: 1.600-inch
Block: GM LSX
Camshaft specs: Cam Motion solid roller, 255/262 degrees at .050, .707-/.680-inch lift
Rocker arms: Jesel, 1.7:1
Lifters: Isky
Pushrods: Manton
Crankshaft: Callies
Rods: Manley
Pistons: CP
Rings: Total Seal, .032-inch/.032-inch/3mm
Coatings: Calico/TPIS
Ignition: GM Water pump: Meziere, electric Damper: GM
Oil: Mobil 1, 0W-30
Headers: American Racing, 1.750/1.875-inch primary
Mufflers: MagnaFlow

DYNO DATA
BEST QUALIFYING PULL
RPM TQ HP
3,000 411 235
3,100 427 252
3,200 433 564
3,300 432 273
3,400 430 280
3,500 422 286
3,600 400 289
3,700 392 290
3,800 389 290
3,900 399 291
4,000 389 296
4,100 399 312
4,200 415 332
4,300 435 356
4,400 455 380
4,500 470 403
4,600 482 522
4,700 490 438
4,800 495 452
4,900 498 462
5,000 504 480
5,100 506 492
5,200 512 507
5,300 516 521
5,400 519 534
5,500 520 544
5,600 520 554
5,700 519 563
5,800 517 571
5,900 513 576
6,000 509 582
6,100 506 588
6,200 503 594
6,300 501 601
6,400 498 606
6,500 496 614
6,600 495 622
6,700 491 626
6,800 485 627
6,900 479 630
7,000 472 629