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Question about exhaust rasp.

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Old Jan 30, 2005 | 07:05 PM
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Default Question about exhaust rasp.

So I have Borla with no cats. You can imaging how much it rasps. I have the plate taken out so it's wide open. Is the rasp comming from not having cats, or from the muffler? If I take the muffler off, and replace it with pipe, will it still rasp? ShouldI not do that because of the Borla design?

any info would help!

thanks!
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Old Jan 30, 2005 | 08:05 PM
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The rasp is from the ORY. Some bullet mufflers in the Y-pipe will clear that up.
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Old Jan 30, 2005 | 10:03 PM
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I had the same problem so I had a Borla XR-1 bullet type muffler welded on to the I pipe. the part # is 40085. I don't have a soundclip but it sure did quiet things down and my car has no more rasp. The floorboard had to be hammered in a bit in the tunnel areal on the passenger side rear seat. here's a link of the XR-1 on a Loudmouth setup; at the top you'll also be able to download a soundclip.http://www.javagator.com/z28/images/borlaslp/
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Old Jan 31, 2005 | 12:28 AM
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Originally Posted by ddelallata
I had the same problem so I had a Borla XR-1 bullet type muffler welded on to the I pipe. the part # is 40085. I don't have a soundclip but it sure did quiet things down and my car has no more rasp. The floorboard had to be hammered in a bit in the tunnel areal on the passenger side rear seat. here's a link of the XR-1 on a Loudmouth setup; at the top you'll also be able to download a soundclip.http://www.javagator.com/z28/images/borlaslp/

How much did it quiet down the car? I like the loud..jus tnot the RASP.
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Old Jan 31, 2005 | 09:38 AM
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I replaced my DynoMax bullet with a Borla XR-1 recently and was pleasantly suprised. Still pretty loud, but the rasp is GONE! However, I am getting some metallic rattling, so I may have to adjust the pipe a little. Otherwise, I am very pleased with this set up.
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Old Jan 31, 2005 | 11:34 AM
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I have a jet hot ORY and the borla mouth exhaust (I used the oval muffler) and I still get rasp. The rasp didn't start till I !cats. The problem is with the ORY. I just live with it for now.
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Old Jan 31, 2005 | 11:35 AM
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Damn that muffler is expensive though!!! lol. Maybe i'll try it.
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Old Jan 31, 2005 | 11:42 AM
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it's well worth the $$$. I felt the same way until I heard it. Huge improvement over the LM
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Old Jan 31, 2005 | 03:13 PM
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Originally Posted by jermzz
How much did it quiet down the car? I like the loud..jus tnot the RASP.
it is still crazy loud at WOT. Under normal driving conditions it's still a bit louder than with stock manifolds/cats/with the Borla plate wide open. Rasp is completely gone. After I got the XR-1 I actually get on it a little more now that I'm not embarrassed the way it sounds now.
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Old Jan 31, 2005 | 08:03 PM
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How will it do with the cam? When I took the cats off the cam loped a lot more. Will this take the lope away again like the cats?
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Old Jan 31, 2005 | 08:48 PM
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don't know the answer to that.
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Old Jan 31, 2005 | 09:07 PM
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Originally Posted by jermzz
How will it do with the cam? When I took the cats off the cam loped a lot more. Will this take the lope away again like the cats?
No, the borla is straight through with a screen lengthwise down the center. The screen helps to kill the rasp and the perforated core absorbs the noise, little or no restriction.
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