The numbers: Dual Plane vs. Single plane
DYNO DETAILS
Carburetor Holley 950 Ultra HP 75/79 jets with 1-in open spacer
Ignition MSD 7AL Digital
Headers Hedman 1 3/4-in long-tubes with 18-in extensions
Fuel 91-octane unleaded
Timing 37
Intake manifold Dart dual-plane
DUAL PLANE
107º LSA 110º LSA 113º LSA
Avg. torque 492 lb-ft Avg. torque 485 lb-ft Avg. torque 480 lb-ft
Avg. power 449 hp Avg. power 442 hp Avg. power 439 hp
RPM LB-FT HP RPM LB-FT HP RPM LB-FT HP
2,500 417 198 2,500 409 194 2,500 397 189
2,600 419 207 2,600 411 203 2,600 398 197
2,700 429 220 2,700 420 216 2,700 408 210
2,800 444 237 2,800 433 231 2,800 421 225
2,900 458 253 2,900 448 247 2,900 435 240
3,000 467 267 3,000 459 262 3,000 446 255
3,100 477 282 3,100 470 277 3,100 455 269
3,200 482 294 3,200 477 291 3,200 464 283
3,300 485 305 3,300 481 302 3,300 471 296
3,400 488 316 3,400 485 314 3,400 475 308
3,500 494 329 3,500 489 326 3,500 479 319
3,600 501 343 3,600 495 339 3,600 485 333
3,700 510 360 3,700 502 353 3,700 492 346
3,800 518 375 3,800 509 368 3,800 498 361
3,900 524 389 3,900 514 381 3,900 504 374
4,000 529 403 4,000 520 396 4,000 508 387
4,100 534 417 4,100 525 410 4,100 513 400
4,200 537 429 4,200 529 423 4,200 518 414
4,300 539 441 4,300 532 435 4,300 521 427
4,400 539 452 4,400 532 446 4,400 523 438
4,500 538 461 4,500 532 456 4,500 523 448
4,600 540 473 4,600 533 467 4,600 525 460
4,700 540 483 4,700 533 477 4,700 525 470
4,800 540 493 4,800 533 487 4,800 526 481
4,900 539 503 4,900 533 497 4,900 526 491
5,000 538 512 5,000 531 506 5,000 526 500
5,100 536 521 5,100 530 515 5,100 524 509
5,200 534 529 5,200 529 523 5,200 522 517
5,300 532 536 5,300 526 531 5,300 520 525
5,400 529 544 5,400 524 539 5,400 518 532
5,500 524 549 5,500 520 544 5,500 515 539
5,600 519 554 5,600 516 550 5,600 512 546
5,700 514 558 5,700 511 554 5,700 507 550
5,800 510 563 5,800 505 558 5,800 502 554
5,900 503 565 5,900 499 561 5,900 496 557
6,000 496 566 6,000 494 564 6,000 492 562
6,100 488 566 6,100 485 564 6,100 485 563
6,200 480 567 6,200 479 566 6,200 477 564
6,300 473 568 6,300 472 566 6,300 470 564
6,400 466 568 6,400 463 565 6,400 463 564
6,500 458 567 6,500 455 563 6,500 456 564
6,600 450 566 6,600 448 562 6,600 447 562
6,700 441 563 6,700 435 555 6,700 439 560
6,800 433 561 6,800 417 540 6,800 430 557
6,900 421 553 6,900 400 526 6,900 419 550
7,000 408 544 7,000 389 518 7,000 400 533
7,100 397 537 7,100 379 513 7,100 386 522