Marc Christ
Brand Manager, Modified Mustangs & Fords
December 17, 2010
Photos By: Justin Cesler

Stock ECM
Adaptive On 14 Deg Base Spark
RPMx1,000HPFT-LB
3.80188.73260.84
3.90204.87275.89
4.00216.03283.65
4.10225.09288.35
4.20232.28290.47
4.30238.28291.04
4.40243.97291.22
4.50248.61290.17
4.60250.91286.48
4.70251.59281.15
4.80253.55277.43
4.90256.68275.13
5.00258.42271.46
5.10260.92268.71
5.20263.12265.76
5.30263.76261.38
5.40264.44257.20
5.50265.00253.06
5.60263.66247.28
5.70260.22239.77
Max265.00291.22

Stock ECM W/Pypes
RPMx1,000HPFT-LB
3.80191.32264.35
3.90205.50276.75
4.00217.30285.31
4.10226.28289.86
4.20235.17294.08
4.30242.30295.95
4.40248.75296.92
4.50252.38294.56
4.60254.13290.16
4.70256.19286.28
4.80254.57278.55
4.90258.70277.29
5.00258.68271.72
5.10261.60269.41
5.20263.65266.30
5.30265.07262.67
5.40265.81258.53
5.50264.53252.61
5.60262.66246.34
5.70258.67238.35
Max265.81296.92

Old StuffPypes
Idling78 dB70 dB
WOT acceleration92 dB88 dB
Cruise 55 mph81 dB75 dB
Cruise 80 mph83 dB78 dB

Though it doesn't seem like much, it should be noted that just a few decibels make a big difference. The Pypes system is 4-8 decibels quieter (from inside the car) than our old system with dumps; since we traded our old H-pipe for an X-style midpipe, we picked up some torque, too-the best of both worlds. Now that's music to my ears.

As you can see in the chart, horsepower was up by 4 at 4,500 rpm, though peak remained the same. Torque, however was up by 5 lb-ft at peak.