T20: Weiand 177ci mini-blower with 3.07-inch top pulley and 7-inch bottom pulley (228-percent overdrive). Peak 10.3-psi boost at 6,500 rpm, 36 degrees total advance, Holley 950HP supercharger carb, 100-octane unleaded 76 Racing pump gas and NOS octane booster.
| | T19 | T19 | T20 | T20 |
| 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 |
EFI TestsRight after the blower tests were completed, we moved onto fuel injection. We learned that Edelbrock was making a new EFI manifold based on its outstanding Victor E casting and thought this would be a perfect match for the new F.A.S.T. EFI system we wanted to try out, but we had to know how much power the engine would make with a carb first. So to get those results, we equipped DM with a prototype COMP Cams EFI hydraulic roller camshaft and a Speed Demon 750 carb sitting on top of the new Edelbrock Victor EFI manifold with corks plugging the fuel injector bosses.
T21: same TFS aluminum heads, Edelbrock Victor EFI manifold (PN 29785), COMP Cams Xtreme Energy EFI prototype hydraulic roller camshaft (281/288 advance duration, 230/236 duration at .050, .544/.555 lift with 1.6 rockers, 113 LS) straight up. COMP Cams 1.6:1 Pro Magnum roller rockers, Speed Demon 750 carb, 36 degrees total advance.