4" QTEC on 4" Catback Dyno Numbers
4" QTEC on 4" Catback Dyno Numbers We just built a 402 recently(there is a thread about the motor) and got some open vs closed dyno number with our 4 " electric cutout. This is a 402 with 1 3/4" HVMC headers our 3" Off Road Y Pipe going through a 4" Mufflex Catback with our 4" Quick Time Electric Cutout.
We wanted to see what gains would be on what is thought to be one of the best catbacks out there.
10.5 HP Gain Peak
12 TQ Gain Peak
15HP and 18.4TQ Gain at 4300
And it averaged 9.9hp gain and 10.8 TQ gain. Averaged!
Enjoy
RPM HP Closed TQ Closed HP Open TQ Torque HP Diff TQ Diff
3100 234.2 396.8 236.9 401.3 2.7 4.5
3200 246.1 404.0 248.1 407.1 2.0 3.1
3300 260.6 414.7 258.7 411.7 -1.9 -3.0
3400 272.6 421.1 269.8 416.7 -2.8 -4.4
3500 284.8 427.4 284.2 426.5 -0.6 -0.9
3600
3700
3800 318.4 440.0 327.2 452.2 8.8 12.2
3900 326.0 439.1 338.4 455.7 12.4 16.6
4000 336.3 441.6 349.6 459.1 13.3 17.5
4100 347.8 445.6 360.9 462.3 13.1 16.7
4200 362.3 453.1 375.5 469.5 13.2 16.4
4300 376.7 460.1 391.7 478.5 15.0 18.4
4400 391.6 467.4 405.4 483.9 13.8 16.5
4500 405.6 473.4 418.7 488.7 13.1 15.3
4600 414.3 473.1 429.9 490.8 15.6 17.7
4700 425.3 475.2 437.4 488.8 12.1 13.6
4800 433.9 474.8 446.1 488.1 12.2 13.3
4900 440.7 472.3 452.2 484.7 11.5 12.4
5000 447.1 469.6 458.5 481.6 11.4 12.0
5100 453.6 467.2 463.6 477.4 10.0 10.2
5200 460.9 465.5 472.4 477.1 11.5 11.6
5300 464.1 459.9 476.9 472.6 12.8 12.7
5400 470.8 457.9 479.4 466.2 8.6 8.3
5500 473.4 452.0 483.0 461.2 9.6 9.2
5600 476.8 447.1 490.7 460.3 13.9 13.2
5700 484.3 446.3 497.4 458.3 13.1 12.0
5800 490.8 444.5 501.0 453.6 10.2 9.1
5900 495.1 440.7 505.7 450.2 10.6 9.5
6000 495.4 433.6 505.9 442.8 10.5 9.2
6100 476.6 410.4 490.8 422.6 14.2 12.2
Avg Gain 9.9HP 10.8TQ
We wanted to see what gains would be on what is thought to be one of the best catbacks out there.
10.5 HP Gain Peak
12 TQ Gain Peak
15HP and 18.4TQ Gain at 4300
And it averaged 9.9hp gain and 10.8 TQ gain. Averaged!
Enjoy
RPM HP Closed TQ Closed HP Open TQ Torque HP Diff TQ Diff
3100 234.2 396.8 236.9 401.3 2.7 4.5
3200 246.1 404.0 248.1 407.1 2.0 3.1
3300 260.6 414.7 258.7 411.7 -1.9 -3.0
3400 272.6 421.1 269.8 416.7 -2.8 -4.4
3500 284.8 427.4 284.2 426.5 -0.6 -0.9
3600
3700
3800 318.4 440.0 327.2 452.2 8.8 12.2
3900 326.0 439.1 338.4 455.7 12.4 16.6
4000 336.3 441.6 349.6 459.1 13.3 17.5
4100 347.8 445.6 360.9 462.3 13.1 16.7
4200 362.3 453.1 375.5 469.5 13.2 16.4
4300 376.7 460.1 391.7 478.5 15.0 18.4
4400 391.6 467.4 405.4 483.9 13.8 16.5
4500 405.6 473.4 418.7 488.7 13.1 15.3
4600 414.3 473.1 429.9 490.8 15.6 17.7
4700 425.3 475.2 437.4 488.8 12.1 13.6
4800 433.9 474.8 446.1 488.1 12.2 13.3
4900 440.7 472.3 452.2 484.7 11.5 12.4
5000 447.1 469.6 458.5 481.6 11.4 12.0
5100 453.6 467.2 463.6 477.4 10.0 10.2
5200 460.9 465.5 472.4 477.1 11.5 11.6
5300 464.1 459.9 476.9 472.6 12.8 12.7
5400 470.8 457.9 479.4 466.2 8.6 8.3
5500 473.4 452.0 483.0 461.2 9.6 9.2
5600 476.8 447.1 490.7 460.3 13.9 13.2
5700 484.3 446.3 497.4 458.3 13.1 12.0
5800 490.8 444.5 501.0 453.6 10.2 9.1
5900 495.1 440.7 505.7 450.2 10.6 9.5
6000 495.4 433.6 505.9 442.8 10.5 9.2
6100 476.6 410.4 490.8 422.6 14.2 12.2
Avg Gain 9.9HP 10.8TQ
