A new, shorter blower drive...
A new, shorter blower drive was developed by KB to mount the long 2.8 Twin Screw as far forward on the engine as possible. That gives plenty of room behind the blower for a properly sized inlet. The new blower drive is internally the same as before, but its drive pulleys mount over the drive, not in front of it.
Sometimes short and sweet info paints the big picture best. Here's a summary of Kenne Bell GT 500 dyno data to put the kits in perspective.
To avoid data overload, we're only showing two dyno runs from hundreds. The first is the showroom-stock GT 500 readout before any electronic tuning. The second is the 801-rwhp pass made when we visited at the end of development. As it always seems to work out, the true peak number doesn't show in the 100-rpm resolution, but we assure you, it was at 6,320 rpm.
Kenne Bell also showed us the best test, an 810-rwhp blast using the same configuration that ran 801 rwhp for us. The difference was attributed to a slightly slipping blower belt and heat-soaking during our visit. KB notes that after several hundred runs, an otherwise-good blower belt will lose enough grip to slip slightly, hence the missing 0.5 pounds of boost during the 801-rwhp run.
As all the dyno graphs have essentially the same shape torque and horsepower curves (more boost means the same curves at higher numbers), these two runs give an accurate idea of how the KB runs on the GT 500. To address the many points in between, see the Dyno Summary sidebar.
| RPM | Baseline | Kenne Bell Stage 3 | Difference |
| Power | Torque | Power | Torque | Power | Torque |
| 2,000 | 130.5 | 342.7 | 228.8 | 600.9 | 98.3 | 258.2 |
| 2,100 | 138.2 | 345.7 | 247.7 | 619.6 | 109.5 | 273.9 |
| 2,200 | 149.4 | 356.6 | 264.9 | 632.4 | 115.5 | 275.8 |
| 2,300 | 156.5 | 357.4 | 282.7 | 645.6 | 126.2 | 288.2 |
| 2,400 | 165.2 | 361.4 | 300.1 | 656.8 | 134.9 | 295.4 |
| 2,500 | 176.6 | 371.1 | 317.1 | 666.2 | 140.5 | 295.1 |
| 2,600 | 188.1 | 379.9 | 332.8 | 672.3 | 144.7 | 292.4 |
| 2,700 | 199.1 | 387.4 | 350.5 | 681.7 | 151.4 | 294.3 |
| 2,800 | 211.0 | 395.9 | 365.0 | 684.7 | 154.0 | 288.8 |
| 2,900 | 219.1 | 396.8 | 377.4 | 683.5 | 158.3 | 286.7 |
| 3,000 | 230.1 | 402.8 | 393.8 | 689.4 | 163.7 | 286.6 |
| 3,100 | 238.8 | 404.6 | 412.1 | 698.2 | 173.3 | 293.6 |
| 3,200 | 252.0 | 413.7 | 430.7 | 707.0 | 178.7 | 293.3 |
| 3,300 | 259.0 | 412.2 | 446.8 | 711.0 | 187.8 | 298.8 |
| 3,400 | 267.9 | 413.9 | 462.4 | 714.4 | 194.5 | 300.5 |
| 3,500 | 277.7 | 416.8 | 479.8 | 719.9 | 202.1 | 303.1 |
| 3,600 | 287.5 | 419.4 | 495.7 | 723.2 | 208.2 | 303.8 |
| 3,700 | 295.7 | 419.7 | 512.5 | 727.5 | 216.8 | 307.8 |
| 3,800 | 305.5 | 422.2 | 526.6 | 727.9 | 221.1 | 305.7 |
| 3,900 | 314.2 | 423.1 | 543.0 | 731.3 | 228.8 | 308.2 |
| 4,000 | 316.8 | 415.9 | 559.9 | 735.1 | 243.1 | 319.2 |
| 4,100 | 330.8 | 423.8 | 575.7 | 737.5 | 244.9 | 313.7 |
| 4,200 | 338.4 | 423.2 | 589.6 | 737.3 | 251.2 | 314.1 |
| 4,300 | 345.6 | 422.1 | 604.4 | 738.2 | 258.8 | 316.1 |
| 4,400 | 355.2 | 423.9 | 619.3 | 739.2 | 264.1 | 315.3 |
| 4,500 | 363.9 | 424.7 | 635.5 | 741.7 | 271.6 | 317.0 |
| 4,600 | 374.6 | 427.7 | 648.6 | 740.6 | 274.0 | 312.9 |
| 4,700 | 378.1 | 422.6 | 664.7 | 742.8 | 286.6 | 320.2 |
| 4,800 | 388.5 | 425.1 | 679.4 | 743.3 | 290.9 | 318.2 |
| 4,900 | 386.9 | 414.7 | 690.6 | 740.2 | 303.7 | 325.5 |
| 5,000 | 394.7 | 414.6 | 702.2 | 737.6 | 307.5 | 323.0 |
| 5,100 | 400.9 | 412.9 | 712.1 | 733.4 | 311.2 | 320.5 |
| 5,200 | 405.3 | 409.4 | 726.0 | 733.2 | 320.7 | 323.8 |
| 5,300 | 407.6 | 403.9 | 733.8 | 727.1 | 326.2 | 323.2 |
| 5,400 | 417.9 | 406.5 | 744.1 | 723.7 | 326.2 | 317.2 |
| 5,500 | 414.3 | 395.7 | 751.9 | 718.0 | 337.6 | 322.3 |
| 5,600 | 424.9 | 398.5 | 759.3 | 712.2 | 334.4 | 313.7 |
| 5,700 | 425.7 | 392.3 | 765.4 | 705.2 | 339.7 | 312.9 |
| 5,800 | 432.1 | 391.3 | 774.5 | 701.3 | 342.4 | 310.0 |
| 5,900 | 434.9 | 387.1 | 780.0 | 694.4 | 345.1 | 307.3 |
| 6,000 | 439.8 | 385.0 | 784.2 | 686.5 | 344.4 | 301.5 |
| 6,100 | 440.4 | 379.2 | 786.1 | 676.8 | 345.7 | 297.6 |
| 6,200 | 441.8 | 374.2 | 789.6 | 668.9 | 347.8 | 294.7 |
| 6,300 | 424.8 | 354.2 | 798.5 | 665.7 | 373.7 | 311.5 |