Just as with the stock Boss...
Just as with the stock Boss 302, the modified version was run with a set of long-tube Hooker Super Comp headers. The 1 3/4-inch headers fit the dyno perfectly and exhaled through a set of 3-inch collector extensions.
CHI 3V Airflow Data-Intake Flow At 28 Inches
| Lift | BOSS 302 | Dr. Js CHI 3V |
| 0.050 | 32 | 39 |
| 0.100 | 61 | 75 |
| 0.200 | 116 | 147 |
| 0.300 | 174 | 216 |
| 0.400 | 221 | 274 |
| 0.500 | 252 | 319 |
| 0.600 | 274 | 330 |
| 0.700 | 279 | 334 |
CHI 3V Airflow Data-Exhaust Flow At 28 Inches
| Lift | BOSS 302 | DR. JS CHI 3V |
| 0.050 | 26 | 28 |
| 0.100 | 51 | 61 |
| 0.200 | 91 | 112 |
| 0.300 | 126 | 148 |
| 0.400 | 156 | 186 |
| 0.500 | 176 | 204 |
| 0.600 | 187 | 218 |
| 0.700 | 191 | 228 |
We ran a set of 1.73:1 ratio...
We ran a set of 1.73:1 ratio roller rockers from Ford Racing on the CHI heads. Also present was a set of hardened pushrods and guideplates from Comp Cams.
Here is a shot of the Moroso...
Here is a shot of the Moroso oil pan for our Better Boss. Where the factory Boss oil pan featured a front-sump design, this deep-sump pan was designed with a rear sump for use in a late-model Mustang application.
Run with a pan full of lightweight...
Run with a pan full of lightweight Lucas Pro Stock oil and the Cam Research Corp roller cam, the CHI-headed 302 produced peak numbers of 542 hp at 7,200 rpm and 418 lb-ft at 5,800 rpm. Better Boss indeed!
Power Numbers-Boss 302 Vs Modified Vs Cam Research
| Stock Boss | Mod Boss | Cam R Boss |
| RPM | HP | TQ | HP | TQ | HP | TQ |
| 5,200 | 313 | 316 | 385 | 389 | 391 | 395 |
| 5,400 | 325 | 316 | 405 | 394 | 420 | 408 |
| 5,600 | 336 | 315 | 425 | 399 | 445 | 417 |
| 5,800 | 347 | 314 | 438 | 396 | 462 | 418 |
| 6,000 | 355 | 311 | 445 | 390 | 469 | 411 |
| 6,200 | 362 | 307 | 462 | 391 | 488 | 413 |
| 6,400 | 371 | 304 | 482 | 396 | 507 | 416 |
| 6,600 | 373 | 297 | 496 | 395 | 522 | 415 |
| 6,800 | 373 | 288 | 507 | 392 | 532 | 411 |
| 7,000 | 369 | 277 | 520 | 390 | 536 | 402 |
| 7,200 | NA | NA | 518 | 378 | 542 | 395 |