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Bracket Talk Bracket Talk Forum Tech Talk - by Abruzzi Q: Quiet, low-restriction muffler for tow rigGo | New | Find | Notify | Tools | Reply | |
| Q: Quiet, low-restriction muffler for tow rig | Login/Join |
DRR Trophy |
Guys, I'm fixing up the exhaust system on my old, '90 Chevy C3500 tow vehicle. I replaced the headers, and wish to mount a pair of the quietest, low-restriction mufflers I can find. I'm thinking of the Flowmaster line, but will of course consider others. Any suggestions? Thank you much! TroyThis message has been edited. Last edited by: Bad Nusz, | ||
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DRR Pro |
Even with a stock engine and mufflers, running headers will often create a resonant frequency "buzz" inside the vehicle at right around cruise RPM (1800-2200 RPM). It can be a annoying to some, because you are almost constantly in that RPM range. If you get this issue, and want to eliminate it, adding a crossover tube (H-Pipe or X-Pipe) between the 2 exhaust pipes will double the frequency of the exhaust pulses from each pipe, which moves the resonant frequency down to half of the RPM as before, (about 1,000), so you pass through the buzz quickly right off idle, and won't have it constantly vibrating while you drive around town. Dan "Jim" Moore Much too young to feel this damn old!! | |||
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DRR Pro |
We always used generic muffler shop "Turbo mufflers", if you'll have full tailpipes, they sound good, pretty quiet. On my '87 Dually, and my G-20 van I just removed the mufflers, and inserted a straight pipe. the catalytic converter keeps them quiet. Could barely hear the Dually running. You do realize that there will be nothing you can do to improve the power or fuel mileage, right? I greatly improved the driveability of the Dually by moving the O2 sensor from the exhaust manifold to the the Y-pipe merge point, and used a heated O2 sensor.This message has been edited. Last edited by: Goob, "Despite the high cost of living, it remains popular." Dave Cook N375 | |||
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DRR Top Comp |
The Thrush Cherry Bomb Vortex muffler is a nice muffler with low restriction and not too loud. I do think the quieter they are for most part the more restrictive they are. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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| DRR Trophy |
That is all very interesting, Jim; thank you. | |||
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| DRR Trophy |
Thanks everyone for your thoughtful responses. I was thinking about the Thrush 17715 muffler, available through local, chain parts dealers for about 50 bucks each. But then, after installing newer headers and fixing all the exhaust leaks, the system now seems acceptably quiet, even with what I think are Flowmaster 40s or 44s. Quite a change in character!! I will run it for awhile, even though the Flowmasters seem to have a more metallic tone, and not the deep rumble I'd like for my tow rig. For better fuel economy, I'm looking at a newer, more modern truck in a year or two. Thx again! | |||
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Bracket Talk Bracket Talk Forum Tech Talk - by Abruzzi Q: Quiet, low-restriction muffler for tow rig
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