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Old 06-26-2002, 02:13 AM   #1
WRXVII
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Default Car feels faster without a silencer

I can definitely feel more low end power with a silencer removed. I have BPM GT turboback exhaust system and my car defintely feels smoother without a silencer. Is that just me who feels that way? I think the silencer would create more back pressure thus reducing the torque...
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Old 06-26-2002, 02:14 AM   #2
krave
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it's probably in your head, the dyno shows no gains
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Old 06-26-2002, 02:37 AM   #3
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Default Re: Car feels faster without a silencer

Quote:
Originally posted by WRXVII
I can definitely feel more low end power with a silencer removed. I have BPM GT turboback exhaust system and my car defintely feels smoother without a silencer. Is that just me who feels that way? I think the silencer would create more back pressure thus reducing the torque...

Actually. It lost 25hp on a dyno test. The more power you make the greater the negative effect. If you want performance leave it out. It necks your exhaust down to less than 2 inches.

CT
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Old 06-26-2002, 03:00 AM   #4
Mephiska
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Not saying it gained any power (that is all in your head) but I don't see how removing the silencer would decrease horsepower.
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Old 06-26-2002, 05:53 AM   #5
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I got the BPM GT also and I can tell Im losing power with it in. It's cool that I have it if I need it but I'll keep it out for the most part.
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Old 06-26-2002, 09:12 AM   #6
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Default RAMPANT CONFUSION!

I think WRXVII is talking about the muffler silencer included with the BPM exhausts, not the intake silencer removal mod.

duh.

Kevin
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Old 06-26-2002, 09:16 AM   #7
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Default Re: Car feels faster without a silencer

Quote:
Originally posted by WRXVII
I can definitely feel more low end power with a silencer removed. I have BPM GT turboback exhaust system and my car defintely feels smoother without a silencer. Is that just me who feels that way? I think the silencer would create more back pressure thus reducing the torque...
The turbocharger is enough of a bottleneck so that you don't need additional backpressure.

Rich
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Old 06-26-2002, 09:35 AM   #8
twitch
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Of course on a dyno there is no ram air effect happening (either with or without the silencer mod). Not sure how you could account for this in a test where the car is sitting still.

Edit: Yeah, I'm a dumba$$. Now I am clear on what he is talking about. It would stand to reason that an exhaust silencer would indeed hamper horsepower to some extent.

Last edited by twitch; 06-26-2002 at 03:17 PM.
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Old 06-26-2002, 09:48 AM   #9
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Default WRXVII

I am assuming that WRXVII is talking about the exhaust. If so, removing an obstruction will help the turbo to spool quicker giving boost earlier.

Rich
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Old 06-26-2002, 01:15 PM   #10
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Quote:
Originally posted by twitch
Of course on a dyno there is no ram air effect happening (either with or without the silencer mod). Not sure how you could account for this in a test where the car is sitting still.

If you read the post you would see he is talking about the BPM GT turbo back exhaust. That system has a Plug that you stick in the tailpipe to reduce noise. It necks the exhaust down to less than 2 inches and robs power. Nobody is talking about the Intake.

CT
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Old 06-26-2002, 01:40 PM   #11
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Quote:
Originally posted by krave
it's probably in your head, the dyno shows no gains
Yup. Not only that, but I felt a LOSS of low/mid range tq with it. I'm positive about that. I prompty put it on. I ran back to back 1/4 times and the time didn't change. Noise mod only (it was really annoying sounding too).
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Old 06-26-2002, 01:44 PM   #12
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Quote:
Originally posted by TypeC

Yup. Not only that, but I felt a LOSS of low/mid range tq with it. I'm positive about that. I prompty put it on. I ran back to back 1/4 times and the time didn't change. Noise mod only (it was really annoying sounding too).
AAAAAARRRRRRRRRRRRGGGGGGGGGGGGG!

Not the intake sliencer! Stop hijacking the thread!

Kevin
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Old 06-26-2002, 02:31 PM   #13
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Old 06-26-2002, 02:49 PM   #14
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As I said earlier, the lack of the exhaust restriction might help the power by helping the turbo to spool quicker giving boost earlier. Of course, a louder exhaust will make you feel as if you are going faster.

Rich
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Old 06-26-2002, 03:11 PM   #15
Leonardo
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Fixed the title!

Leo
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Old 06-26-2002, 03:58 PM   #16
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I have the BPM GT and the silencer.

I can feel a difference in power with the silencer in versus out. I won't say that it makes MORE power with the silencer out, but the power comes on differently. I suppose it has to do with the spool.

My gut would tell me that the peak power would be somewhat higher with the silencer out, but I have no dyno #'s to back that up.

I have to give the nod to the folks who have actual dyno time to show what's happening.
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