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      08-20-2012, 08:54 PM   #1
Roy Cormier
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Arrow E92 335i - stock exhaust sound with gutted cats.

Heres a short video of my E92 335i with gutted cats. I haven't had time to weld up a new exhaust system yet but wanted a little bit more sound out of the car.

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Last edited by Roy Cormier; 10-10-2012 at 08:46 AM.
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      08-20-2012, 09:21 PM   #2
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not bad ! Sounds good dude
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      08-20-2012, 09:27 PM   #3
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Very nice!
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      08-21-2012, 08:22 PM   #4
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Did the same to mines sounds real good
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      08-21-2012, 08:31 PM   #5
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How is the turbo sound?
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      08-21-2012, 09:13 PM   #6
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Must likely its my Iphone speakers...but did not sounded right.
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      08-21-2012, 09:30 PM   #7
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diggin it
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      08-23-2012, 11:18 AM   #8
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Quote:
Originally Posted by E90Company View Post
How is the turbo sound?
It sounds great. I had a friend take a video of me driving down the road and I could hear the turbine whine out the exhaust pretty good.
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      08-23-2012, 11:22 AM   #9
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love it, not too much, just right
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      09-21-2012, 02:16 AM   #10
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What did you do exactly to get the gurgle consistently?
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      09-21-2012, 03:27 AM   #11
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What did you do exactly to get the gurgle consistently?
you mean like this?
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      09-21-2012, 07:19 PM   #12
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Quote:
Originally Posted by Verbatim View Post
you mean like this?
It Seemed a little bit more predominant in his video; but that could just be the volume. But yes thats what I'm interested in, the description stated he re-tuned the DME to ensure he consistently gets the gurgle.
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      09-21-2012, 08:57 PM   #13
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Quote:
Originally Posted by syd View Post
It Seemed a little bit more predominant in his video; but that could just be the volume. But yes thats what I'm interested in, the description stated he re-tuned the DME to ensure he consistently gets the gurgle.
it will pop and gurgle for a bit when you downshift or let off the gas with the resonator removed, but if you want it to rumble all the way down the revs.. just hold the gas down a bit
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      09-21-2012, 09:01 PM   #14
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Quote:
Originally Posted by Verbatim View Post
just don't let off the gas all the way
it will pop and gurgle for a bit when you downshift or let off the gas, but if you want it to rumble all the way down the revs.. just hold the gas down a bit
Thanks for clarifying that!
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      09-21-2012, 09:05 PM   #15
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Quote:
Originally Posted by syd View Post
Thanks for clarifying that!
When you gut all the cats you will get signifigant popping, because unburned fuel is exploding upstream in the exhaust.
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      09-21-2012, 09:14 PM   #16
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Quote:
Originally Posted by E90Company View Post
When you gut all the cats you will get signifigant popping, because unburned fuel is exploding upstream in the exhaust.
catless will be the biggest difference when it comes to backfiring
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      09-21-2012, 09:17 PM   #17
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Quote:
Originally Posted by E90Company View Post
When you gut all the cats you will get signifigant popping, because unburned fuel is exploding upstream in the exhaust.
Quote:
Originally Posted by Verbatim View Post
catless will be the biggest difference when it comes to backfiring
I will look into that, Thanks guys!
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      09-21-2012, 10:45 PM   #18
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Are both cats removed, primary/secondary? Is your car tuned?
Love the popping sound. If you have more details how you accomplished this will be great
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      09-24-2012, 11:33 AM   #19
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Quote:
Originally Posted by BMWnation View Post
Are both cats removed, primary/secondary? Is your car tuned?
Love the popping sound. If you have more details how you accomplished this will be great
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      09-24-2012, 03:13 PM   #20
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Very nice. I like the backfiring pop as well.
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      10-10-2012, 09:05 AM   #21
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Looks like I wasn't subscribed to updates from this thread, so I didn't know there were any replies til now. I can't find the exact copy of the map from the video, but if I remember correctly I modified the "Torque Request Tables" in Cobb ATR.

At 0% pedal position requested torque was 0, I increased this a very small amount. The car idled slightly higher as I expected, but the increase was hardly noticeable.

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If you can leave black marks on a straight from the time you exit a corner till the time you brake for the next turn....... Then, you have enough horsepower.

Last edited by Roy Cormier; 10-10-2012 at 09:11 AM.
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