Rasp Killer

Alias · 10-30-2009, 10:31 AM

So im looking for a way to kill my rasp and I just found this company on the web.

http://www.carchemistry.com/

They make exhaust inserts that slip into your midsection that can be secured down.

These can eliminate rasp and will quiet down the exhaust by about 7-10db.

Only downside is they will create a little backpressure. They make a 3 disk application for around 50 each

alpineweissM3 · 10-30-2009, 10:37 AM

Rasp? I know the e46 M3 had a nasty rasp, but the e9x???

MMMorish · 10-30-2009, 11:01 AM

Quote:

Originally Posted by alpineweissM3

Rasp? I know the e46 M3 had a nasty rasp, but the e9x???

+1 There is no rasp to this car at all.

Alias · 10-30-2009, 11:12 AM

not for people running catless

Singletrack · 10-30-2009, 11:53 AM

Why would you favor that vs. a small round muffler from say Magnaflow used as a resonator? They have a straight-through design and tend to add a deeper tone to the exhaust. I'm actually considering modifying my fabspeed to replace their resonators (which appear to be glasspacks) with this setup. I just need to get under the car and take some measurements.

http://www.magnaflow.com/02product/u...sp?shape=round

Just a suggestion...

Alias · 10-30-2009, 01:27 PM

Quote:

Originally Posted by Singletrack

Why would you favor that vs. a small round muffler from say Magnaflow used as a resonator? They have a straight-through design and tend to add a deeper tone to the exhaust. I'm actually considering modifying my fabspeed to replace their resonators (which appear to be glasspacks) with this setup. I just need to get under the car and take some measurements.

http://www.magnaflow.com/02product/u...sp?shape=round

Just a suggestion...

that is an option, but i like the idea of sliding something into my mid pipe and securing it down also

well see

Singletrack · 10-30-2009, 01:48 PM

Quote:

Originally Posted by Alias

that is an option, but i like the idea of sliding something into my mid pipe and securing it down also

well see

I can see the appeal of not having to permanently modify it, but I fail to see how that setup is going to absord much noise. I would also guess that it will introduce a decent amount of resistance. Just my opinion. Do they have some before/after vids or clips?

Alias · 10-30-2009, 02:03 PM

Quote:

Originally Posted by Singletrack

I can see the appeal of not having to permanently modify it, but I fail to see how that setup is going to absord much noise. I would also guess that it will introduce a decent amount of resistance. Just my opinion. Do they have some before/after vids or clips?

only other info I could find on these is from the other forums

http://forums.bimmerforums.com/forum...d.php?t=745850

MrHarris · 10-30-2009, 02:15 PM

Quote:

Originally Posted by MMMorish

+1 There is no rasp to this car at all.

This isn't true. There's major rasp with the RPi system w/ version 1 x-pipe.

There's a very slight hint of rasp with Gintani catless system.

IMO if it's done right the rasp actually makes the car sound more unique. But if it's all out rasp then it doesn't sound good AT ALL.

powertrip · 10-30-2009, 05:47 PM

Agreed

. These cars get raspy as hell when you remove the primary cats. My Encore set-up gets raspy right around 3500-4500 rpms.

Quote:

Originally Posted by MrHarris

This isn't true. There's major rasp with the RPi system w/ version 1 x-pipe.

There's a very slight hint of rasp with Gintani catless system.

IMO if it's done right the rasp actually makes the car sound more unique. But if it's all out rasp then it doesn't sound good AT ALL.

10-30-2009, 10:31 AM	#1
Alias dork 38 Rep 477 Posts Drives: //M Join Date: Jul 2007 Location: so cal iTrader: (3)	Rasp Killer So im looking for a way to kill my rasp and I just found this company on the web. http://www.carchemistry.com/ They make exhaust inserts that slip into your midsection that can be secured down. These can eliminate rasp and will quiet down the exhaust by about 7-10db. Only downside is they will create a little backpressure. They make a 3 disk application for around 50 each
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10-30-2009, 10:37 AM	#2
alpineweissM3 I love my beautiful wife! 22 Rep 628 Posts Drives: e90 ///M Join Date: Oct 2007 Location: Pittsburgh iTrader: (0)	Rasp? I know the e46 M3 had a nasty rasp, but the e9x???
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10-30-2009, 11:12 AM	#4
Alias dork 38 Rep 477 Posts Drives: //M Join Date: Jul 2007 Location: so cal iTrader: (3)	not for people running catless
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10-30-2009, 11:53 AM	#5
Singletrack 4th down; 4th quarter? Renegade. 87 Rep 3,850 Posts Drives: 09 SSII E92 M3; 19 FG M5C Join Date: Aug 2008 Location: Pittsburgh, PA iTrader: (3)	Why would you favor that vs. a small round muffler from say Magnaflow used as a resonator? They have a straight-through design and tend to add a deeper tone to the exhaust. I'm actually considering modifying my fabspeed to replace their resonators (which appear to be glasspacks) with this setup. I just need to get under the car and take some measurements. http://www.magnaflow.com/02product/u...sp?shape=round Just a suggestion...
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