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Berk TP and HKS. Recently installed...

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Old 05-16-2006 | 07:30 AM
  #11  
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Originally Posted by Calgarian,May 16 2006, 08:11 AM
I've had the experience of driving behind a S2000 with a cat removed and can honestly say it stinks. I'm all for modding as long as the car does not emit additional pollutants. This is one mod which s/b left at the track.
That would be me. The TP is gone. You can now look forward to driving behind Danny and smelling his exhaust. With a supercharger, I was also getting a tremendous amount of black sooty smoke when I punched it. With the cat back on, it no longer does it.
Old 05-16-2006 | 07:57 AM
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Originally Posted by xviper,May 16 2006, 10:30 AM
That would be me. The TP is gone. You can now look forward to driving behind Danny and smelling his exhaust. With a supercharger, I was also getting a tremendous amount of black sooty smoke when I punched it. With the cat back on, it no longer does it.
What does your butt dyno say concerning the cat on/cat off with the supercharger?
Old 05-16-2006 | 10:49 AM
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Originally Posted by slimjim8201,May 16 2006, 08:57 AM
What does your butt dyno say concerning the cat on/cat off with the supercharger?
Butt dyno says no difference.
Old 05-16-2006 | 10:56 AM
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It's the aftermarket exhaust causing the drone, not the testpipe.

Give it awhile. I found that the butt-dyno seemed to measure a more significant power gain after 500 or so miles.
Old 05-16-2006 | 11:37 AM
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Originally Posted by Harpoon,May 16 2006, 10:56 AM
It's the aftermarket exhaust causing the drone, not the testpipe.

Give it awhile. I found that the butt-dyno seemed to measure a more significant power gain after 500 or so miles.
Could this be from the ECU adjusting to it?
Old 05-16-2006 | 11:54 AM
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Originally Posted by Project22a,May 16 2006, 11:37 AM
Could this be from the ECU adjusting to it?
Yes, I think that's it exactly. I thought about doing before and after dyno's on the same day I had the pipe put on and decided against it because the ECU wouldn't have adjusted yet. Glad I didn't bother in retrospect.
Old 05-16-2006 | 12:05 PM
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Hmmm... i'm suprised that you think it sounds more "ricey." When I had this setup with a different brand testpipe (not that it matters) I thought that it made it sound less ricey since it wasn't the same monotone sound, but this just goes to show how subjective the sound of exhausts are.
Old 05-16-2006 | 12:11 PM
  #18  
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I am 3k with a berk TP and no CEL.
Old 05-16-2006 | 12:24 PM
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Originally Posted by versionJDM,May 16 2006, 03:11 PM
I am 3k with a berk TP and no CEL.
I'm at close to 3k w/ no CEL.. but it varies car to car.. possibly dependent on how rich its running.
Old 05-16-2006 | 12:44 PM
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Originally Posted by Harpoon,May 16 2006, 01:56 PM
It's the aftermarket exhaust causing the drone, not the testpipe.

Give it awhile. I found that the butt-dyno seemed to measure a more significant power gain after 500 or so miles.
I am well aware that its the HKS with the drone. The test pipe has just amplified the magnitude of the sound of the exhaust throughout the engine range. Unfortunately, it amplified the drone as well. Although I will admit that the drone could still be considered "slight" compared to a few other exhaust systems.

The overall pitch of the exhaust has increased slightly as well. I think I can sum it up this way:

You might have to go into a room where no one can hear you to try this. Make a "wau" sound. Looks funny, but sound that out. Notice how wide your mouth is open. Now make the same noise but open your mouth about 25% more. Thats the difference in pitch. In a nutshell.

Don't get me wrong, the sound is good (really good). It's just not what I want all the time. Sometimes I don't want to be heard.


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