Does anybody know if an exhaust silencer reduces power?
Oct 26, 2006, 09:30 AM
#4
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I dont have any graphs to back it up but of course it will increase back pressure which is why you run a larger aftermarket exhaust in the first place, to reduce back pressure. So in a word, YES.
Oct 26, 2006, 10:11 AM
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Yeah I popped mine in to see what kind of difference it made, and it was pretty bad....killed all the top-end power, and didn't exactly help the bottom-end either. On the up side, it sure was quiet...I was pretty amazed at how much difference it made in noise.
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Oct 26, 2006, 11:37 AM
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Originally Posted by rcheung
Yes you definately will lose a significant amount of horsepower. It can be 10-40 horsepower depending on how small the silencer necks down to. If you do a search, I made this same exact thread and got some very good responses.
I didn't realize there where such a power loss of 35 to even 50 hp with it on. There is a noticable difference, I'll say that.
rcheung, thanks for the thread info, I finally found the thread.
Oct 26, 2006, 08:11 PM
#9
Back when I had my megan exhaust and put the silencer on I noticed a HUGE difference in power. At first I thought it was in my head and I was just not use to the car being so quiet but I was wrong. If you want quiet, get a quiet exhaust and dont bother with any silencers. I loved my megan and the sound but the authorities did not. I wound up getting a greddy SP2 which is very safe now passing cops on the highway unless I'm flooring it. It is still louder than my megan with the silencer but it is pretty damn quiet and I don't have the big horsepower loss. Im sure the greddy exhaust will lose some power because its a bit more restrictive then the completely open megan exhaust but it is nothing compared with a silencer.
Oct 27, 2006, 08:23 AM
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Thanks for all the info everyone. So here's my next question, which will be better to run with, the stock cat or silencer? I'm running a cat delete but the Greddy Ti without the silencer is just too dam load. I know this isn't new news with this system but I don't see in any of the threads, that they ever compare the stock cat or the silencer with this system. I want to know if the stock cat will be a better alternative than that silencer. How much power loss will I have with the stock cat? I've seen people who have the Greddy Ti exhaust and run the stock cat. They mention the sound isn't too bad. The Greddy Ti is a badass exhaust system but I'm starting to feel it's really just for racing.
I originally was running an Injen turbo back set-up because it was supposed to be more low profile. I've been cited for this Injen exhaust system and have passed the noise citation with this system. It makes good power and does require the stock cat to pass the test. Now, I'm just contemplating wheter or not I should go back to my Injen set up because with the delete you don't really notice it? The Greddy is truely a different story.
I originally was running an Injen turbo back set-up because it was supposed to be more low profile. I've been cited for this Injen exhaust system and have passed the noise citation with this system. It makes good power and does require the stock cat to pass the test. Now, I'm just contemplating wheter or not I should go back to my Injen set up because with the delete you don't really notice it? The Greddy is truely a different story.
Last edited by 58177; Oct 27, 2006 at 08:26 AM.
Oct 27, 2006, 10:21 AM
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Originally Posted by evo8rcr
are you serious?
Last edited by 58177; Oct 27, 2006 at 10:29 AM.
Oct 30, 2006, 01:44 AM
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Since you all talking about exhausts and back pressure,i have a problem.I am looking for months now to find a muffler 3,5inches pipe diameter and a catalytic converter 4inchs pipe diameter and no one can help.Pls if someone can help i will appreciate because i can not run my car without those......
Oct 30, 2006, 08:50 AM
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just
just get an full TBE and call it a day
APS makes a 3.5 inch exhaust for the evo, i belive
APS makes a 3.5 inch exhaust for the evo, i belive
Originally Posted by TTOPPOUZI
Since you all talking about exhausts and back pressure,i have a problem.I am looking for months now to find a muffler 3,5inches pipe diameter and a catalytic converter 4inchs pipe diameter and no one can help.Pls if someone can help i will appreciate because i can not run my car without those......