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| Test 14 Vortec heads | Test 15 COMP 1.6 rockers | | RPM | TQ | HP | TQ | HP | | 2600 | 383 | 190 | 379 | 188 | | 2800 | 389 | 208 | 384 | 204 | | 3000 | 406 | 232 | 404 | 231 | | 3200 | 422 | 257 | 427 | 260 | | 3400 | 429 | 278 | 433 | 280 | | 3600 | 431 | 295 | 435 | 298 | | 3800 | 429 | 311 | 437 | 316 | | 4000 | 426 | 325 | 432 | 329 | | 4200 | 425 | 340 | 433 | 347 | | 4400 | 430 | 361 | 434 | 364 | | 4600 | 433 | 379 | 439 | 385 | | 4800 | 430 | 393 | 433 | 396 | | 5000 | 421 | 400 | 423 | 402 | | 5200 | 406 | 402 | 411 | 407 | | 5400 | 395 | 406 | 401 | 413 | | 5600 | 384 | 409 | 389 | 415 | | 5800 | 365 | 403 | 365 | 403 | | Max | 435 | 409 | 440 | 416 | | Avg | 413 | 330 | 417 | 333 | | Test 17 1.6I/1.5E rockers | Test 18 COMP XE268H | | RPM | TQ | HP | TQ | HP | | 2600 | 384 | 190 | 371 | 184 | | 2800 | 392 | 209 | 379 | 202 | | 3000 | 413 | 236 | 400 | 229 | | 3200 | 428 | 261 | 425 | 259 | | 3400 | 432 | 280 | 431 | 279 | | 3600 | 437 | 299 | 436 | 299 | | 3800 | 439 | 317 | 435 | 315 | | 4000 | 439 | 335 | 430 | 328 | | 4200 | 437 | 350 | 431 | 344 | | 4400 | 438 | 367 | 439 | 367 | | 4600 | 441 | 387 | 437 | 383 | | 4800 | 435 | 398 | 438 | 400 | | 5000 | 425 | 405 | 429 | 408 | | 5200 | 413 | 409 | 417 | 413 | | 5400 | 401 | 412 | 407 | 419 | | 5600 | 388 | 414 | 398 | 424 | | 5800 | 366 | 404 | 387 | 427 | | Max | 442 | 414 | 439 | 427 | | Avg | 419 | 335 | 418 | 335 | | Test 19 Unblown | Test 20 Blown | | RPM | TQ | HP | TQ | HP | | 2600 | 358 | 177 | 490 | 243 | | 2800 | 363 | 193 | 500 | 266 | | 3000 | 382 | 218 | 514 | 293 | | 3200 | 414 | 252 | 526 | 320 | | 3400 | 417 | 270 | 543 | 352 | | 3600 | 417 | 286 | 555 | 380 | | 3800 | 415 | 300 | 557 | 403 | | 4000 | 413 | 315 | 561 | 427 | | 4200 | 413 | 330 | 567 | 453 | | 4400 | 418 | 351 | 568 | 475 | | 4600 | 434 | 380 | 571 | 500 | | 4800 | 425 | 389 | 571 | 521 | | 5000 | 412 | 392 | 564 | 537 | | 5200 | 408 | 404 | 560 | 554 | | 5400 | 407 | 419 | 558 | 573 | | 5600 | 405 | 432 | 547 | 583 | | 5800 | 399 | 441 | 532 | 588 | | 6000 | 384 | 439 | 518 | 592 | | 6200 | 374 | 441 | 508 | 600 | | 6400 | 356 | 434 | 494 | 602 | | Max | 434 | 444 | 574 | 602 | | Avg | 401 | 340 | 539 | 462 |
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