This test compared a Vigilante 2800 stall 9inch torque converter
from Precision Industries , against a stock 700R4 converter that was "loosened"
to about 1800-1900 rpm stall by DelTrans here in Newark, DE. The
engine was entirely the same, consisting of a ZZ4 crate motor, AFR190 heads,
LT4 HOT cam, siamesed Edelbrock TPI intake base, and SLP 1-3/4" SS headers.
| Vig | Stock | Vig | Stock | ||||
| RPM | Torque | Torque | Diff. | HP | HP |
Diff.
|
|
|
3400
|
355
|
325
|
30
|
|
230
|
210
|
20
|
|
3600
|
375
|
326
|
49
|
265
|
221
|
44
|
|
|
3800
|
379 | 327 | 52 | 275 | 235 | 40 | |
| 4000 | 372 | 332 | 40 | 288 | 244 | 44 | |
| 4200 | 365 | 335 | 30 | 294 | 261 | 33 | |
| 4400 | 355 | 337 | 18 | 295 | 274 | 21 | |
| 4600 | 335 | 334 | 1 | 294 | 285 | 9 | |
| 4800 | 322 | 326 | -4 | 294 | 295 | -1 | |
| 5000 | 311 | 313 | -2 | 294 | 299 | -3 | |
| 5200 | 299 | 303 | -4 | 296 | 301 | -5 | |
| 5400 | 288 | 293 | -5 | 296 | 300 | -4 | |
| 5600 | 278 | 278 | 0 | 296 | 299 | -3 | |
| 5800 | 268 | 270 | -2 | 296 | 297 | -1 | |
| 6000 | 259 | 259 | 0 | 296 | 295 |
1
|
|
|
6200
|
250
|
245
|
5
|
|
296
|
293
|
3
|
|
6400
|
232
|
na
|
284
|
na
|
|||
|
6600
|
218
|
na
|
274
|
na
|
| Vig | Diff. over Stock | Stock | ||||
| Temp |
~58
|
72
|
||||
| Humidity | 71 | |||||
| Baro | 30.41 | |||||
| R/T | 0.532 | 0.608 | ||||
| 60' | 1.652 | 0.318 | 1.97 | |||
| 330' | 4.901 | 0.521 | 5.422 | |||
| 1/8 | 7.697 | 0.601 | 8.298 | |||
| Mph | 87.74 | 2.44 | 85.3 | |||
| 1000' | 10.125 | 0.652 | 10.777 | |||
| 1/4 | 12.183 | 0.679 | 12.862 | |||
| Mph | 109.59 | 1.25 | 108.34 |
