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Chambered muffler vs. straight-through muffler |
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Dynamometer Tests
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K&N drop-in filter and cat-back exhaust with 4-chamber muffler (test #5210) vs. K&N drop-in filter and cat-back exhaust with straight-through muffler (test #5211). Tested on 97 S Series DOHC with stock internals. Measured at the flywheel.
5210 includes K&N drop-in filter, 2-in mandrel exhaust pipe, and chambered muffler
| | | | | | | | | | | | X>14.7=lean | | 5211 replaces chambered muffler with straight-through muffler | | | | | | | | | | | | X<14.7=rich | | | | | | | | | | OIL TEMP | WATER TEMP | AIR FLOW | % LAMBDA | A/F Ratio | | | RPM | 5210 TQ | 5210 HP | 5211 TQ | TQ GAIN | 5211 HP | HP GAIN | DEG F | DEG F | SCFM | 1/AF RATIO | (X:1) | | | 4000 | 116.7 | 88.9 | 117.4 | 0.7 | 89.4 | 0.5 | 179.5 | 185.5 | 105.7 | 0.861 | 12.65287 | | | 4100 | 118.6 | 92.6 | 119.5 | 0.9 | 93.3 | 0.7 | 180.0 | 185.5 | 111.8 | 0.860 | 12.63899 | | | 4200 | 118.8 | 95.0 | 119.6 | 0.8 | 95.7 | 0.6 | 180.5 | 186.0 | 116.3 | 0.860 | 12.63839 | | | 4300 | 118.8 | 97.2 | 119.5 | 0.8 | 97.9 | 0.7 | 181.5 | 186.0 | 119.6 | 0.857 | 12.60405 | | | 4400 | 119.0 | 99.7 | 119.9 | 0.9 | 100.5 | 0.8 | 182.0 | 186.0 | 123.8 | 0.859 | 12.62769 | | | 4500 | 119.8 | 102.6 | 120.8 | 1.0 | 103.5 | 0.9 | 182.5 | 185.0 | 127.9 | 0.865 | 12.71261 | | | 4600 | 121.0 | 106.0 | 122.1 | 1.1 | 106.9 | 0.9 | 182.5 | 185.0 | 132.6 | 0.873 | 12.83908 | | | 4700 | 122.2 | 109.3 | 123.4 | 1.2 | 110.4 | 1.1 | 182.5 | 184.5 | 136.2 | 0.874 | 12.84917 | | | 4800 | 122.2 | 111.6 | 123.5 | 1.3 | 112.9 | 1.2 | 182.5 | 184.5 | 141.0 | 0.869 | 12.77787 | | | 4900 | 122.5 | 114.3 | 124.2 | 1.7 | 115.8 | 1.5 | 183.0 | 184.5 | 145.3 | 0.868 | 12.75884 | | | 5000 | 123.2 | 117.3 | 124.2 | 1.0 | 118.2 | 1.0 | 183.0 | 184.5 | 149.6 | 0.857 | 12.59615 | | | 5100 | 122.8 | 119.2 | 123.9 | 1.1 | 120.3 | 1.0 | 183.5 | 184.5 | 154.0 | 0.853 | 12.53713 | | | 5200 | 122.3 | 121.1 | 123.8 | 1.5 | 122.6 | 1.5 | 184.0 | 185.0 | 157.1 | 0.852 | 12.52781 | | | 5300 | 121.9 | 123.0 | 123.1 | 1.2 | 124.2 | 1.2 | 184.0 | 185.0 | 161.8 | 0.853 | 12.54124 | | | 5400 | 120.6 | 124.0 | 122.1 | 1.5 | 125.5 | 1.6 | 184.0 | 185.0 | 165.5 | 0.851 | 12.50659 | | | 5500 | 119.8 | 125.4 | 121.0 | 1.2 | 126.7 | 1.3 | 184.5 | 185.5 | 167.7 | 0.848 | 12.47279 | | | 5600 | 118.3 | 126.2 | 119.8 | 1.4 | 127.7 | 1.5 | 184.5 | 185.5 | 170.9 | 0.849 | 12.48589 | | | 5700 | 116.8 | 126.8 | 118.3 | 1.5 | 128.4 | 1.6 | 184.0 | 186.0 | 172.8 | 0.849 | 12.4864 | | | 5800 | 115.3 | 127.4 | 116.6 | 1.2 | 128.7 | 1.3 | 183.0 | 185.5 | 175.6 | 0.849 | 12.47837 | | | 5900 | 113.2 | 127.2 | 114.9 | 1.7 | 129.1 | 1.8 | 182.5 | 185.5 | 176.6 | 0.848 | 12.46428 | | | 6000 | 111.5 | 127.4 | 113.2 | 1.7 | 129.3 | 2.0 | 182.0 | 185.5 | 177.7 | 0.847 | 12.45163 | | | 6100 | 110.3 | 128.1 | 112.2 | 1.9 | 130.3 | 2.2 | 181.5 | 185.5 | 178.2 | 0.850 | 12.49215 | | | 6200 | 108.5 | 128.0 | 110.2 | 1.7 | 130.1 | 2.1 | 181.0 | 185.5 | 179.8 | 0.859 | 12.62458 | | | 6300 | 107.2 | 128.6 | 108.6 | 1.4 | 130.3 | 1.7 | 180.0 | 185.5 | 182.0 | 0.875 | 12.86365 | | | 6400 | 105.2 | 128.2 | 106.9 | 1.7 | 130.3 | 2.1 | 180.0 | 185.5 | 183.2 | 0.891 | 13.09512 | | | 6483 | 102.1 | 126.3 | 104.9 | 2.8 | 129.2 | 2.8 | 180.0 | 185.5 | 181.3 | 0.889 | 13.0627 |
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