SPS

Baseline vs. combined Powerstack, 2-in mandrel exhaust, straight-through muffler, and headers

Dynamometer Tests

Baseline with K&N drop-in filter (test #5207) vs. combined Powerstack, 2-in mandrel exhaust, straight-through muffler, and headers (test #5216). Tested on 97 S Series DOHC with stock internals. Measured at the flywheel.     5207 includes K&N drop-in filter, all else stock                       X>14.7=lean 5216 includes Powerstack short-ram intake, 2-in mandrel exhaust, straight-through muffler, and headers                       X<14.7=rich                 OIL TEMP WATER TEMP AIR FLOW % LAMBDA A/F Ratio   RPM 5207 TQ 5207 HP 5216 TQ TQ GAIN 5216 HP HP GAIN DEG F DEG F SCFM 1/AF RATIO (X:1)   4000 116.4 88.7 122.1 5.7 93.0 4.3 189.5 177.5 109.9 0.868 12.7644   4100 117.4 91.7 123.1 5.7 96.2 4.5 189.5 177.5 115.0 0.866 12.72346   4200 117.2 93.7 123.6 6.4 98.8 5.1 189.5 178.0 119.1 0.860 12.64859   4300 117.0 95.8 124.2 7.2 101.6 5.8 189.5 178.0 120.9 0.859 12.63136   4400 117.3 98.3 125.5 8.1 105.1 6.8 189.5 178.5 125.2 0.859 12.62645   4500 118.1 101.2 127.3 9.2 109.1 7.9 189.5 179.0 129.0 0.862 12.66752   4600 118.9 104.1 128.5 9.6 112.6 8.4 189.5 178.5 133.5 0.870 12.78837   4700 119.8 107.2 129.2 9.5 115.6 8.5 189.5 179.0 136.8 0.874 12.84701   4800 119.9 109.6 128.7 8.7 117.6 7.9 190.0 179.0 140.3 0.872 12.81542   4900 120.1 112.1 128.0 7.9 119.4 7.3 190.0 179.0 143.8 0.865 12.72212   5000 120.3 114.5 127.3 7.0 121.2 6.6 190.0 179.0 146.2 0.856 12.58082   5100 119.8 116.4 127.0 7.2 123.3 7.0 190.0 178.5 151.1 0.848 12.46453   5200 119.3 118.1 126.9 7.5 125.6 7.4 190.0 178.5 153.5 0.846 12.43842   5300 119.3 120.3 125.9 6.7 127.0 6.7 190.5 178.5 157.7 0.846 12.43743   5400 117.9 121.2 125.2 7.3 128.7 7.5 190.5 179.0 163.0 0.846 12.43717   5500 116.4 121.9 124.8 8.4 130.7 8.8 190.5 179.0 166.8 0.845 12.42356   5600 115.1 122.7 124.5 9.5 132.8 10.0 190.5 179.0 169.2 0.848 12.46622   5700 113.6 123.3 124.1 10.4 134.6 11.3 190.5 178.5 169.9 0.848 12.47218   5800 111.9 123.5 122.3 10.4 135.0 11.4 190.5 179.0 172.5 0.848 12.46491   5900 109.8 123.3 120.0 10.2 134.8 11.5 190.5 179.0 173.5 0.847 12.45036   6000 108.3 123.6 118.4 10.1 135.3 11.6 190.5 179.0 173.2 0.847 12.44679   6100 106.4 123.6 117.6 11.2 136.5 13.0 190.5 179.0 173.6 0.850 12.49036   6200 105.3 124.3 115.8 10.5 136.7 12.4 190.5 179.0 175.8 0.856 12.58855   6300 104.0 124.7 114.3 10.3 137.0 12.3 190.5 179.0 176.7 0.873 12.83153   6400 102.2 124.5 111.7 9.5 136.1 11.6 190.5 179.0 177.7 0.890 13.08375   6483 99.2 122.5 109.0 9.8 135.0 12.5 190.5 179.0 178.3 0.887 13.03491

 

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