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Buick 455 Cylinder Heads - 455 Head Check
 From left to right are the...  From left to right are the stock iron heads... | 
...the Edelbrocks... |  ...and the TA Performance...  ...and the TA Performance versions (the last of which has slightly larger valves). The combustion chamber shapes are slightly different, but they are all within 2 cc of each other. Ignition timing for best power was 32 degrees total with the stock heads, 34 with the aluminum heads. |  These photos compare the different...  These photos compare the different shapes of the spark plug holes on the Edelbrock heads... |  ...and the TA units. With...  ...and the TA units. With the Edelbrocks, a little grinding would have been needed to clear the dipstick tube; you can see here that we plugged the hole after loading the pan with Lucas sauce. |  We used E3 spark plugs throughout...  We used E3 spark plugs throughout our test. The only thing notable about this is that the TA heads needed a cleanup tap run through the plug holes, while the Edelbrocks did not. |
| RPM | Stock | Edelbrock | TA Performance | LB-FT | HP | LB-FT | HP | LB-FT | HP | | 2,200 | 388 | 162 | 430 | 180 | 427 | 179 | | 2,300 | 390 | 171 | 424 | 186 | 423 | 185 | | 2,400 | 402 | 184 | 423 | 193 | 425 | 194 | | 2,500 | 415 | 198 | 427 | 203 | 431 | 205 | | 2,600 | 423 | 210 | 434 | 215 | 437 | 216 | | 2,700 | 429 | 220 | 441 | 227 | 444 | 228 | | 2,800 | 434 | 232 | 448 | 239 | 451 | 241 | | 2,900 | 440 | 243 | 457 | 252 | 459 | 253 | | 3,000 | 447 | 255 | 466 | 266 | 467 | 267 | | 3,100 | 455 | 268 | 474 | 280 | 476 | 281 | | 3,200 | 464 | 283 | 483 | 294 | 485 | 296 | | 3,300 | 471 | 296 | 492 | 309 | 492 | 309 | | 3,400 | 477 | 309 | 501 | 324 | 499 | 323 | | 3,500 | 483 | 322 | 508 | 339 | 506 | 337 | | 3,600 | 488 | 344 | 513 | 352 | 513 | 352 | | 3,700 | 491 | 346 | 516 | 364 | 518 | 365 | | 3,800 | 492 | 356 | 518 | 375 | 522 | 377 | | 3,900 | 494 | 367 | 519 | 386 | 523 | 388 | | 4,000 | 495 | 377 | 519 | 395 | 523 | 399 | | 4,100 | 495 | 386 | 518 | 405 | 523 | 409 | | 4,200 | 492 | 394 | 518 | 414 | 523 | 418 | | 4,300 | 489 | 400 | 518 | 424 | 524 | 429 | | 4,400 | 485 | 406 | 519 | 435 | 526 | 440 | | 4,500 | 481 | 412 | 519 | 444 | 527 | 451 | | 4,600 | 479 | 419 | 518 | 453 | 526 | 461 | | 4,700 | 478 | 428 | 515 | 461 | 525 | 470 | | 4,800 | 476 | 436 | 512 | 468 | 524 | 479 | | 4,900 | 474 | 442 | 508 | 474 | 522 | 487 | | 5,000 | 469 | 446 | 505 | 481 | 519 | 494 | | 5,100 | 462 | 449 | 502 | 487 | 414 | 499 | | 5,200 | 456 | 451 | 498 | 493 | 508 | 502 | | 5,300 | 450 | 451 | 494 | 498 | 502 | 506 | | 5,400 | 444 | 457 | 488 | 501 | 496 | 510 | | 5,500 | 438 | 459 | 479 | 501 | 489 | 512 | | 5,600 | 431 | 459 | 468 | 499 | 481 | 513 | | 5,700 | 419 | 455 | 458 | 497 | 472 | 512 | | 5,800 | 408 | 451 | 444 | 491 | 462 | 511 | | 5,900 | 395 | 444 | 433 | 486 | 452 | 508 | | 6,000 | 383 | 437 | 419 | 479 | 441 | 504 | | AVG | 452 | 349 | 483 | 379 | 489 | 385 |
| SOURCES | | ARP | JMS Racing Engines | | Ventura, CA | Monrovia, CA | | 800/826-3045 | 626/357-2718 | | 805/339-2200 | jmsracing.com | | arp-bolts.com | | | | Lucas Oil Products | | E3 | Corona, CA | | Ponte Vedra, FL | 800/342-2512 | | e3sparkplugs.com | 951/270-0154 | | | lucasoil.com | | Edelbrock | | | Torrance, CA | MSD Ignition | | 800/416-8628 | El Paso, TX | | edelbrock.com | 915/855-7123 | | | msdignition.com | | Holley Performance Products | | | Bowling Green, KY | Percy's High Performance | | 270/781-9741 | Linn Creek, MO | | holley.com | 888/737-2970 | | | percyshp.com | | Hooker Headers (a Division | | | of Holley) | Rockett Brand Racing Fuel | | Bowling Green, KY | Glenview, IL | | 270/781-9741 (tech) | 800/345-0076 | | 800/465-5391 (dealers) | rockettbrand.com | | ilovemyhookerheaders.com | | | | TA Performance | | Jet-Hot | Scottsdale, AZ | | 336/447-2000 | 480/922-6807 | | jet-hot.com | taperformance.com |
 | If you love torque, you'll love this series. Part one of three. |
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