C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Another exhaust question

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Old May 3, 2013 | 01:17 PM
  #21  
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Originally Posted by cuisinartvette
You cannot have a "loud car" and no drone

Corsas and the oval (not welded)Ultraflows can do this ie the higher pitch avoiding those low frequency humms that cause drone
I agree with the higher pitch comment -- as support of what I was saying.

Loud is subjective. Many people will call my car loud now...but mostly non-sports-car people. I've heard louder. On a scale of 1-10 with open headers being a 10 and 1 being factory, I'm probably up to a 6 on the volume scale. It's in the mellow 3-4 range at idle but get's louder under load.

Peak volume at a high-enough rpm that there's no insult to my ears..or reverberation in the cabin. But, one person's "drone" might be another's musical note.

Mine had drone until I pulled out the muffler. It was a chambered muffer (without packing) similar to FlowMaster construction. Low frequency harmonics were a be-otch. 6th gear driving was annoying when traveling up ANY grade.

Just by removing the muffler, that "drone" is gone. The exhaust is actually louder -- so the loudness-to-drone scale isn't necessarily linear. If I removed the front cats, I'm betting the drone would return -- though the pitch wouldn't change that much.

What I'm trying to say is the pitch your exhaust is tuned to plays a role is how much volume you can tolerate before you might categorize it as "drone". I'm sure an open ****-pit dragster -- running open pipes could be termed having "drone". Again, it's a perceptual thing.

For the OP's car...as quiet as it is, I'm 100% convinced it can be louder and tuned to a frequency where the exhaust isn't annoying.
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Old May 3, 2013 | 07:59 PM
  #22  
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Originally Posted by GREGGPENN
I agree with the higher pitch comment -- as support of what I was saying.

Loud is subjective. Many people will call my car loud now...but mostly non-sports-car people. I've heard louder. On a scale of 1-10 with open headers being a 10 and 1 being factory, I'm probably up to a 6 on the volume scale. It's in the mellow 3-4 range at idle but get's louder under load.

Peak volume at a high-enough rpm that there's no insult to my ears..or reverberation in the cabin. But, one person's "drone" might be another's musical note.

Mine had drone until I pulled out the muffler. It was a chambered muffer (without packing) similar to FlowMaster construction. Low frequency harmonics were a be-otch. 6th gear driving was annoying when traveling up ANY grade.

Just by removing the muffler, that "drone" is gone. The exhaust is actually louder -- so the loudness-to-drone scale isn't necessarily linear. If I removed the front cats, I'm betting the drone would return -- though the pitch wouldn't change that much.

What I'm trying to say is the pitch your exhaust is tuned to plays a role is how much volume you can tolerate before you might categorize it as "drone". I'm sure an open ****-pit dragster -- running open pipes could be termed having "drone". Again, it's a perceptual thing.

For the OP's car...as quiet as it is, I'm 100% convinced it can be louder and tuned to a frequency where the exhaust isn't annoying.

i measured the sound level of my old car before it was wrecked, and being duals with no cats and flowmaster 40 at 10 feet it measured in a 96dB. This shouldn't be that loud right? either way it's going under the knife tomorrow morning. I will be at the exhaust shop at 9, unfortunately it will be raining all weekend so after leaving there i will just be driving back home to put her up for drier weather. LOL
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Old May 3, 2013 | 11:22 PM
  #23  
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http://www.magnaflow.com/02product/s...=main&id=10961

http://www.magnaflow.com/02product/s...=main&id=10962

I have had one of these in place of the stock resonator for about five years now. Best move I made exhaust wise, to go along with the muffler elims. The difference between this and your x-pipe is that this is a perforated x-pipe with sound absorbing material. It really works to add depth and tone to the exhaust. If after the cat delete, it still doesn't drone. GreggPenn has heard it.
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Old May 4, 2013 | 12:15 AM
  #24  
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Originally Posted by lt4obsesses
http://www.magnaflow.com/02product/s...=main&id=10961

http://www.magnaflow.com/02product/s...=main&id=10962

I have had one of these in place of the stock resonator for about five years now. Best move I made exhaust wise, to go along with the muffler elims. The difference between this and your x-pipe is that this is a perforated x-pipe with sound absorbing material. It really works to add depth and tone to the exhaust. If after the cat delete, it still doesn't drone. GreggPenn has heard it.
Yes, I definitely like that x-resonator and consider it just about the best "canister-muffler" piece sold today. I recently said so in this thread. (2nd and 3rd para).
http://forums.corvetteforum.com/1583775642-post32.html
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Old May 4, 2013 | 01:40 AM
  #25  
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Originally Posted by GREGGPENN
Yes, I definitely like that x-resonator and consider it just about the best "canister-muffler" piece sold today. I recently said so in this thread. (2nd and 3rd para).
http://forums.corvetteforum.com/1583775642-post32.html
Yes, I really do like the sound. That time you drove it while I listened was the first time I heard it from the outside under acceleration.

I agree with the post you linked to. I paid under $100 for that muffler, and about $100 to have it installed. The trick thing about is that the x-pipe inside has a width of about six inches. Judging from the visible exhaust flow from the rear on cold days, I would say it flows pretty well. Just need to get the clutch fixed and then I may be on the hunt for some long tubes.
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Old May 4, 2013 | 02:06 AM
  #26  
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ive considered a resonator like that also even though its non vette. Should ck and see if it would fit hmm.
Love cars that are fast yet quiet at cruise and idle..and can dumb down the sound of a cam. Sleepers
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Old May 4, 2013 | 09:01 AM
  #27  
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Originally Posted by cuisinartvette
ive considered a resonator like that also even though its non vette. Should ck and see if it would fit hmm.
Love cars that are fast yet quiet at cruise and idle..and can dumb down the sound of a cam. Sleepers
It's essencially the exact same fit as the stock resonator. The only differences are it's shorter and the pipes are about a 1/4 inch further apart. It was a simple adjustment for the installer.

I think if it they sold it as a "direct fit" muffler for a Corvette, they would add that $500 Corvette tax.
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Old May 4, 2013 | 11:59 AM
  #28  
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i am back from exhaust shop, as far as loudness it is about what i expected, but the best part is no drone... atleast not at the rpm i drive at. it does a little at around 2.5-3k rpm but that is far out of where you drive at. overall i am happy with how it sounds.
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Old May 5, 2013 | 09:39 PM
  #29  
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Originally Posted by eatmydst1234
i am back from exhaust shop, as far as loudness it is about what i expected, but the best part is no drone... atleast not at the rpm i drive at. it does a little at around 2.5-3k rpm but that is far out of where you drive at. overall i am happy with how it sounds.
Here is a video of how it sounds..


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Old May 5, 2013 | 10:36 PM
  #30  
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Sounds great now. Just about the tone mine has.
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