Pypes Violators noise??
06-21-2007, 12:47 AM
#1
2nd Gear Member
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Join Date: Oct 2006
Location: MO
Posts: 488
Pypes Violators noise??
I just installed a set of Pypes Violators on my 07 GT a couple days ago. Besides the alignment issues that I've found answers to thanks to some people on here, I also have a wierd noise. At lower RPM's, around cruising speed, it sounds like like a buzzing coming from the rear end. almost like metal on metal vibration. When parked, I have yet been able to reproduce the noise, and it comes and goes. It will be VERY loud right around 1500 RPMs to the point I'm embarassed for someone to hear me drive by. If I give it gas, it goes away, and comes back when the RPM's come back down. If I give it a few miles, it will go away again. I was wondering if anyone else has had this? I guess I need to get under there and quadruple check that everything is tight, I double checked everything before we lowered it off of the stands, but who knows....
06-21-2007, 06:01 PM
#4
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RE: Pypes Violators noise??
no, this is in addition to the drone. As far as describing the noise, you know when a ghetto cruiser goes by with the stereo bumping and you hear that vibration of the trunk panels? It's a similar noise, but not to a beat, just steady for that RPM range.
06-21-2007, 06:14 PM
#5
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Join Date: Feb 2007
Location: Northern Virginia
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RE: Pypes Violators noise??
Make sure that the hangers are not anywhere near the body of the car. They can vibrate at certain rpm's while moving and hit the body. Even if they look like they have clearance, they still move around.
06-21-2007, 06:51 PM
#6
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RE: Pypes Violators noise??
ah, good idea, I did have to cut one a little shorter because it was hitting the impact bumper, maybe it's still too close. And I just got back from driving in it, I'm going to change my description of the sound. It sounds more like a rattling heat shield than anything. I had a similar sound on my truck when the heat shield busted a weld and was vibrating on the pipe. It didn't start until I got these mufflers, I don't know if there is anything inside the muffler that could be making this noise or not. I will check the hangers though.
06-21-2007, 08:38 PM
#7
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Join Date: Mar 2007
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RE: Pypes Violators noise??
Stangdude, I was trying to think of what that would be. A rattle at that rpm made me think of "heat shield" first of all butthey wouldn't be in your area where you putthe Violators on. (And I would think the heat shield sound would be in the front of the car, anyway.) I would think a loose clamp would get louder as you increased rpm's past 1500. The Pypes guy recommended an air rachet instead of biceps strength for the clamps!One possiblething is maybe the jackstands"stretched" a weld somewhere. Hey, it happens! As Aziraphale mentioned, the hangers can make noise when they touch, I didn't have to cut mine, though. The way these mufflers are made, it doesn't look like there are any chambers that could break off and rattle. Let us know what works!
06-21-2007, 08:45 PM
#8
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RE: Pypes Violators noise??
ORIGINAL: stangdude81
I just installed a set of Pypes Violators on my 07 GT a couple days ago. Besides the alignment issues that I've found answers to thanks to some people on here, I also have a wierd noise. At lower RPM's, around cruising speed, it sounds like like a buzzing coming from the rear end. almost like metal on metal vibration. When parked, I have yet been able to reproduce the noise, and it comes and goes. It will be VERY loud right around 1500 RPMs to the point I'm embarassed for someone to hear me drive by. If I give it gas, it goes away, and comes back when the RPM's come back down. If I give it a few miles, it will go away again. I was wondering if anyone else has had this? I guess I need to get under there and quadruple check that everything is tight, I double checked everything before we lowered it off of the stands, but who knows....
I just installed a set of Pypes Violators on my 07 GT a couple days ago. Besides the alignment issues that I've found answers to thanks to some people on here, I also have a wierd noise. At lower RPM's, around cruising speed, it sounds like like a buzzing coming from the rear end. almost like metal on metal vibration. When parked, I have yet been able to reproduce the noise, and it comes and goes. It will be VERY loud right around 1500 RPMs to the point I'm embarassed for someone to hear me drive by. If I give it gas, it goes away, and comes back when the RPM's come back down. If I give it a few miles, it will go away again. I was wondering if anyone else has had this? I guess I need to get under there and quadruple check that everything is tight, I double checked everything before we lowered it off of the stands, but who knows....
The other thing it could be is the resonating frequency of the mufflers may be the same as the trunk metal. Meaning when the violator hits it's 'sweet' spot with the drone, it's the right frequency to vibrate certain parts of the trunk. I get a metal rattle from my trunk area/buzz at about the same RPM you do. I'm planning on adding some sound deading to my trunk and rubberized coating under the rear area to see if that will kill it. If it doesn't then it's a design 'flaw' of the muffler.
06-21-2007, 08:52 PM
#9
3rd Gear Member
Join Date: Mar 2007
Posts: 573
RE: Pypes Violators noise??
Wow Derfthat's wild. Do you guy's have autos? I don't get any sound like that. I'll look for it next time I'm in the car, but I honestly don't spend much time at 1500, especially since I installed a Hurst short shifter!
