AEROHEAD RACING
317.862.0223
aeroheadracing.com
One of the bargains we tested was the Aerohead small-block Chevy head, featuring a larger com-bustion chamber than most tested. It should be noted that this netted a lower compression ratio. These reconditioned Dart Iron Eagle S/S heads pro-duced a healthy torque number of 475 lb-ft at 3,900 rpm and 430 horses at 5,700 rpm. With these heads you can gain power and save money.
| CATEGORY 1 |
| MODEL: | Aerohead Cast Iron, 165cc |
| PN: | ARO-CH-1D-SS |
| PRICE: | $625/pair |
| Weight: | 52 pounds each |
| True measured combustion chamber volume: | 73 cc |
| True measured intake and exhaust port volume: | 178 cc; 70 cc |
| Spring pressure: | 90 lbs. on seat; 270 lbs. at 0.500-inch lift |
| installed height: | 1.850 inch |
| Valve size: | 1.94/1.50-inch |
| Intake flow at 0.400 lift: | 219 cfm |
| Complete, no guideplates |
| Airflow |
| Valve lift | .050 | .100 | .200 | .300 | .400 | .500 | .600 |
| Intake Corr test flow | 29.5 | 60 | 116 | 162 | 219 | 225 | 226 |
| Exhaust Corr test flow | 22.5 | 48 | 101 | 141 | 171 | 185 | 188 |
| POWER |
| Average torque: | 440 lb-ft |
| Average horsepower: | 389 hp |
| RPM | lb-ft | HP |
| 3,200 | 446 | 272 |
| 3,300 | 448 | 281 |
| 3,400 | 454 | 294 |
| 3,500 | 460 | 307 |
| 3,600 | 464 | 318 |
| 3,700 | 470 | 331 |
| 3,800 | 475 | 343 |
| 3,900 | 476 | 353 |
| 4,000 | 475 | 362 |
| 4,100 | 473 | 369 |
| 4,200 | 472 | 377 |
| 4,300 | 471 | 385 |
| 4,400 | 469 | 393 |
| 4,500 | 467 | 400 |
| 4,600 | 461 | 404 |
| 4,700 | 457 | 409 |
| 4,800 | 451 | 412 |
| 4,900 | 445 | 415 |
| 5,000 | 442 | 420 |
| 5,100 | 438 | 425 |
| 5,200 | 432 | 427 |
| 5,300 | 426 | 429 |
| 5,400 | 420 | 432 |
| 5,500 | 410 | 429 |
| 5,600 | 404 | 431 |
| 5,700 | 396 | 430 |
| 5,800 | 388 | 428 |
| 5,900 | 379 | 426 |
| 6,000 | 372 | 425 |
| 6,100 | 359 | 416 |