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K&N drop-in filter vs. Powerstack short ram intake |
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Dynamometer Tests
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K&N drop-in filter and cat-back exhaust with straight-through muffler (test #5211) vs. Powerstack short-ram intake kit and cat-back exhaust with straight-through muffler (test #5213). Tested on 97 S Series DOHC with stock internals. Measured at the flywheel.
5211 includes K&N drop-in filter, 2-in mandrel exhaust, and straight-through muffler
| | | | | | | | | | | | X>14.7=lean | 5213 replaces K&N filter with Powerstack intake
| | | | | | | | | | | | X<14.7=rich | | | | | | | | | | OIL TEMP | WATER TEMP | AIR FLOW | % LAMBDA | A/F Ratio | | | RPM | 5211 TQ | 5211 HP | 5213 TQ | TQ GAIN | 5213 HP | HP GAIN | DEG F | DEG F | SCFM | 1/AF RATIO | (X:1) | | | 4000 | 117.4 | 89.4 | 119.3 | 1.9 | 90.8 | 1.4 | 193.5 | 184.0 | not active | 0.872 | 12.82129 | | | 4100 | 119.5 | 93.3 | 121.2 | 1.7 | 94.6 | 1.3 | 194.0 | 184.0 | not active | 0.870 | 12.78346 | | | 4200 | 119.6 | 95.7 | 121.5 | 1.9 | 97.2 | 1.5 | 194.5 | 184.0 | not active | 0.868 | 12.755 | | | 4300 | 119.5 | 97.9 | 121.4 | 1.9 | 99.4 | 1.5 | 194.5 | 184.0 | not active | 0.867 | 12.74307 | | | 4400 | 119.9 | 100.5 | 122.5 | 2.6 | 102.6 | 2.1 | 195.0 | 184.0 | not active | 0.867 | 12.74651 | | | 4500 | 120.8 | 103.5 | 124.1 | 3.3 | 106.3 | 2.8 | 195.0 | 184.0 | not active | 0.874 | 12.84949 | | | 4600 | 122.1 | 106.9 | 126.0 | 4.0 | 110.4 | 3.5 | 195.0 | 184.0 | not active | 0.889 | 13.0638 | | | 4700 | 123.4 | 110.4 | 127.4 | 4.0 | 114.0 | 3.6 | 195.5 | 184.0 | not active | 0.897 | 13.18218 | | | 4800 | 123.5 | 112.9 | 128.2 | 4.7 | 117.1 | 4.3 | 195.5 | 184.0 | not active | 0.892 | 13.11596 | | | 4900 | 124.2 | 115.8 | 128.5 | 4.3 | 119.8 | 4.0 | 195.5 | 184.0 | not active | 0.881 | 12.94361 | | | 5000 | 124.2 | 118.2 | 127.9 | 3.8 | 121.8 | 3.5 | 196.0 | 184.0 | not active | 0.863 | 12.69261 | | | 5100 | 123.9 | 120.3 | 126.9 | 3.0 | 123.2 | 2.9 | 196.0 | 184.0 | not active | 0.856 | 12.59029 | | | 5200 | 123.8 | 122.6 | 126.1 | 2.2 | 124.8 | 2.2 | 196.5 | 184.0 | not active | 0.856 | 12.5759 | | | 5300 | 123.1 | 124.2 | 124.7 | 1.6 | 125.8 | 1.6 | 196.5 | 184.0 | not active | 0.853 | 12.53994 | | | 5400 | 122.1 | 125.5 | 123.2 | 1.1 | 126.6 | 1.1 | 197.0 | 184.0 | not active | 0.848 | 12.46046 | | | 5500 | 121.0 | 126.7 | 121.6 | 0.6 | 127.3 | 0.6 | 197.0 | 184.0 | not active | 0.844 | 12.40674 | | | 5600 | 119.8 | 127.7 | 120.6 | 0.9 | 128.6 | 0.9 | 197.0 | 184.0 | not active | 0.843 | 12.39571 | | | 5700 | 118.3 | 128.4 | 120.2 | 1.8 | 130.4 | 2.0 | 197.0 | 184.0 | not active | 0.843 | 12.39619 | | | 5800 | 116.6 | 128.7 | 119.1 | 2.5 | 131.5 | 2.8 | 197.0 | 184.0 | not active | 0.844 | 12.40997 | | | 5900 | 114.9 | 129.1 | 118.1 | 3.2 | 132.7 | 3.6 | 197.0 | 184.0 | not active | 0.847 | 12.45795 | | | 6000 | 113.2 | 129.3 | 117.2 | 4.0 | 133.8 | 4.5 | 197.0 | 184.0 | not active | 0.849 | 12.47913 | | | 6100 | 112.2 | 130.3 | 116.1 | 3.9 | 134.9 | 4.5 | 197.0 | 183.5 | not active | 0.856 | 12.58135 | | | 6200 | 110.2 | 130.1 | 114.3 | 4.1 | 134.9 | 4.8 | 197.0 | 184.0 | not active | 0.862 | 12.67792 | | | 6300 | 108.6 | 130.3 | 112.1 | 3.4 | 134.4 | 4.1 | 197.0 | 184.0 | not active | 0.874 | 12.84862 | | | 6400 | 106.9 | 130.3 | 110.0 | 3.0 | 134.0 | 3.7 | 197.0 | 184.0 | not active | 0.888 | 13.05575 | | | 6483 | 104.9 | 129.2 | 107.4 | 2.5 | 132.6 | 3.4 | 196.5 | 184.0 | not active | 0.889 | 13.0627 |
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