| ON THE DYNO |
| | Baseline* | Turbonetics** | Difference |
| RPM | POWER | TORQUE | POWER | TORQUE | POWER | TORQUE |
| 3,500 | 189 | 283 | 245 | 368 | 56 | 85 |
| 3,750 | 207 | 290 | 280 | 392 | 73 | 102 |
| 4,000 | 228 | 299 | 293 | 395 | 65 | 96 |
| 4,250 | 249 | 307 | 326 | 403 | 77 | 96 |
| 4,500 | 264 | 308 | 353 | 412 | 89 | 104 |
| 4,750 | 276 | 305 | 371 | 411 | 95 | 106 |
| 5,000 | 289 | 303 | 387 | 406 | 98 | 103 |
| 5,250 | 296 | 296 | 403 | 403 | 107 | 107 |
| 5,500 | 297 | 283 | 402 | 383 | 105 | 100 |
| 5,750 | N/A | N/A | 402 | 367 | N/A | N/A |
| 6,000 | N/A | N/A | 396 | 346 | N/A | N/A |
| 6,250 | N/A | N/A | 397 | 334 | N/A | N/A |
'05 Roush, Stainless Works long-tube headers, cold-air kit, custom tune'05 Roush, Turbonetics single-turbo kit, SCT tune
Why is car owner Darrell Pitts smiling? (Yes, that is a smile.) His self-named Quiet Sleeper Roush convertible makes more than 400 hp to the wheels and it has room to grow. Before adding the turbo, Darrell's Roush boasted Stainless Works long-tube headers, a cold-air kit, and a custom tune. That's why the earlier numbers are relatively high.
With the Turbonetics kit, those headers were removed and the stock manifolds were reinstalled. With the included SCT flash tool and a Zamboni Speed and Custom tune, Darrell's single-turbo Roush made 407 hp and 414 lb-ft of torque on Zamboni's in-house Dynojet. You don't see those numbers on the included chart because they occurred between focused rpm numbers.
For those thinking these numbers aren't respectable, the Roush made these numbers at only 7 pounds of boost and a rich air/fuel mixture averaging an 11.59 ratio across the board. More boost is available, and the tune leaves more power on the table. Zamboni wants to make sure Darrell enjoys the car and gets used to the new power. In the future, the tune will be maximized for more.
Even so, we drove the car, and it's plenty fun the way it is. Sorry about the tires, Darrell.