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anyone running a muffler on their dump tubes?

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Old Feb 20, 2010, 12:15 PM
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anyone running a muffler on their dump tubes?

not as much a question as a public service announcement. i havent seen any discussion here about it like i do on the other forums. anyways it was quite a hot topic on the subaru forums i used to frequent and when i had my sti i tried running one. it worked great! noise was drastically reduced and there were no ill side effects. my train of thought is if it was restricting flow enough if would cause a spike or some boost creep. i had none and my logs looked the same as before.

here is the one i used. http://www.summitracing.com/parts/SUP-344-1705/

here is is mounted.


here is a sound clip, ewg opened at about 5,600 rpm. the vid doesnt show how much it reduced the noise, it screamed before!
http://www.youtube.com/watch?v=f1hdX34I0rU
Old Feb 20, 2010, 12:34 PM
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I would just let the fire out
Old Feb 20, 2010, 12:40 PM
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Originally Posted by Sharkbite2000
I would just let the fire out
i ran like that for a while. too loud!
Old Feb 20, 2010, 01:01 PM
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I love dumps, it's not like your at WOT all the time. And even if your EWG is recirculated it's not like your car's remotely quiet anyway.
Old Feb 20, 2010, 01:07 PM
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o2 dumps are the ****. It's scary loud fun, just the way I like it. Oh and most important, it helps add power and quicker spoolup.
Old Feb 20, 2010, 01:07 PM
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If you don't want it loud when the WG opens then recirc it to the exhaust. I like shock prople when I drive by at full boost. That muffler thing is rediculous
Old Feb 20, 2010, 01:08 PM
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Originally Posted by gsrboi80
If you don't want it loud when the WG opens then recirc it to the exhaust. I like shock prople when I drive by at full boost. That muffler thing is rediculous
i wanted it quiet without the power loss of recirculating it.
Old Feb 20, 2010, 01:15 PM
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Icant imagine that recirc vs that muffler you are going to show any noticeable power differences. I would think the muffler may restrict just the same
Old Feb 20, 2010, 01:16 PM
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Originally Posted by gsrboi80
Icant imagine that recirc vs that muffler you are going to show any noticeable power differences. I would think the muffler may restrict just the same
i guess you dont know how a turbo works.
Old Feb 20, 2010, 01:16 PM
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Obviously it restricts somewhat. Its blocking the hole.
Old Feb 20, 2010, 01:17 PM
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Originally Posted by n2oiroc
i wanted it quiet without the power loss of recirculating it.
If you do it right, you won't lose any power from recirculating. Like running the dump tube back in at a low angle... maybe 30 degrees making it all flow smoth.... right after the WB O2 sensor.
Old Feb 20, 2010, 01:19 PM
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Originally Posted by mini_evo
If you do it right, you won't lose any power from recirculating. Like running the dump tube back in at a low angle... maybe 30 degrees making it all flow smoth.... right after the WB O2 sensor.
maybe on a smaller setup, but on the bigger setups there will be a power loss.
Old Feb 20, 2010, 01:20 PM
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Originally Posted by dipsetinallday
Obviously it restricts somewhat. Its blocking the hole.
its a lot better than extra backpressure on the turbine wheel from recirculating it.
Old Feb 20, 2010, 01:21 PM
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Call me a ricer, but I love the sound of my dump tube at WOT. I'd toss that thing in the garbage
Old Feb 20, 2010, 01:24 PM
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Originally Posted by n2oiroc
its a lot better than extra backpressure on the turbine wheel from recirculating it.
I dont know about that. I know their is no hole blocked in a recirculating setup.


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