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Nelson Exaust Silencers |
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Calculated Exhaust Flow Rate |
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Calculated Exhaust Flow Rate for a Silencer With Pressure Drop of 1.0" Hg or Less
If pressure drop requirement is 1" of Hg or less and exhaust flow rate (CFM) is
known, the following chart can be used to determine silencer size without calculations. Find the lowest flow rate on the chart that is equal to or greater than the flow rate of your engine
under the appropriate silencing level. |
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Pipe Dimension |
100 Level Silencer |
200 Level Silencer |
300 Level Silencer |
400 Level Silencer |
.0031 |
.75 |
41 |
35 |
29 |
- |
.0055 |
1 |
73 |
63 |
52 |
- |
.0085 |
1.25 |
113 |
98 |
80 |
- |
.0123 |
1.5 |
163 |
142 |
117 |
- |
.0218 |
2 |
288 |
250 |
206 |
- |
.0341 |
2.5 |
450 |
380 |
325 |
- |
.0491 |
3 |
650 |
565 |
470 |
- |
.0668 |
3.5 |
880 |
770 |
640 |
- |
.0873 |
4 |
1160 |
1000 |
830 |
790 |
.1363 |
5 |
1810 |
1580 |
1290 |
1240 |
.1963 |
6 |
2600 |
2250 |
1870 |
1770 |
.3491 |
8 |
4600 |
3900 |
3340 |
3150 |
.5454 |
10 |
7200 |
6200 |
5200 |
4950 |
.7854 |
12 |
10200 |
8800 |
7500 |
7100 |
1.069 |
14 |
14000 |
12000 |
10200 |
9700 |
1.438 |
16 |
18000 |
15500 |
13700 |
13000 |
1.760 |
18 |
23000 |
19800 |
16800 |
16000 |
2.180 |
20 |
28400 |
24300 |
20900 |
19700 |
2.640 |
22 |
34400 |
29500 |
25300 |
24000 |
Note:
These precalculated exhaust flow rates are based on an end in end out silencer. Please refer to specific specification sheet when determining
back pressure for a side inlet or middle side inlet silencer.* |
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Copyright © 2005, Western Filter Co., Inc. - All Rights Reserved |
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