Need exhaust shop/welder recommendation - Phoenix area
#16
I think you are talking about true helmholtz resonators (like those on the HKS SSK exhaust) - they use a short pipe of smaller diameter (the neck) tee'd into the exhaust, with a chamber (usually bottle-shaped) of certain calculated size attached to the end of the neck. The chamber is sealed on the far end. The two types of resonators have similar effect on the exhaust, but helmholtz resonators work differently - they deal with the "spring" effect of the column of air in the neck and chamber somehow. And with that, I've already told you more than I know about true helmholtz resonators. The math for them is more complicated as well...
#17
Ahh gotcha. Yeah I was referring to a helmholtz chamber. Interested to see the results of your QW setup.
Prompted me to read up on the difference. Looks like the QW is a pretty simple solution. Question is, do you need one per pipe and where do you place a 2' pipe haha. Teed off and above the initial mid pipe?
Edit: Found what I had stumbled upon years ago. You could chop the length and then add a band clamp to make it adjustable?
http://synapseengineering.com/produc...horizontalTab1
Prompted me to read up on the difference. Looks like the QW is a pretty simple solution. Question is, do you need one per pipe and where do you place a 2' pipe haha. Teed off and above the initial mid pipe?
Edit: Found what I had stumbled upon years ago. You could chop the length and then add a band clamp to make it adjustable?
http://synapseengineering.com/produc...horizontalTab1
Last edited by FFM; 12-22-16 at 08:34 PM.
#18
Ahh gotcha. Yeah I was referring to a helmholtz chamber. Interested to see the results of your QW setup.
Prompted me to read up on the difference. Looks like the QW is a pretty simple solution. Question is, do you need one per pipe and where do you place a 2' pipe haha. Teed off and above the initial mid pipe?
Edit: Found what I had stumbled upon years ago. You could chop the length and then add a band clamp to make it adjustable?
http://synapseengineering.com/produc...horizontalTab1
Prompted me to read up on the difference. Looks like the QW is a pretty simple solution. Question is, do you need one per pipe and where do you place a 2' pipe haha. Teed off and above the initial mid pipe?
Edit: Found what I had stumbled upon years ago. You could chop the length and then add a band clamp to make it adjustable?
http://synapseengineering.com/produc...horizontalTab1
#19
Good call, sounds like there is a small window in which you can be off and still target the resonance. Thanks for prompting the research, I spent all last night reading up on it now haha. Once I get headers and have to deal with this issue, I will hopefully be well prepared.
Good luck!
Good luck!
#21
No, nothing yet. I currently am scheduled to take the car to PPE on January 26 to have quarter wave resonators installed - PPE is swamped right now and they are moving they shop in a few weeks, so they couldn't get me in for a month.
However, I just got back from a 300 mile road trip over the last 2 days with multiple passengers, and with the ISS DES exhaust and newly installed headers, the drone is crazy loud and annoying. After that trip, I'm wondering if the QW resonators are going to reduce it enough across my drone range (I'm droning loudly from 1,400 to 2,300 rpm). I'm going to do some more research on adding quieter mufflers (stock?, Dynomax VT?, etc) and then see if I have any drone left. I just cringe at the thought of paying PPE prices to have QW resonators built and then decide they didn't do enough only to swap mufflers and then maybe adding new QW resonators on the new system. I'm not sure what I'm going to do, but I'll update this thread (or start a new one) either way.
However, I just got back from a 300 mile road trip over the last 2 days with multiple passengers, and with the ISS DES exhaust and newly installed headers, the drone is crazy loud and annoying. After that trip, I'm wondering if the QW resonators are going to reduce it enough across my drone range (I'm droning loudly from 1,400 to 2,300 rpm). I'm going to do some more research on adding quieter mufflers (stock?, Dynomax VT?, etc) and then see if I have any drone left. I just cringe at the thought of paying PPE prices to have QW resonators built and then decide they didn't do enough only to swap mufflers and then maybe adding new QW resonators on the new system. I'm not sure what I'm going to do, but I'll update this thread (or start a new one) either way.
#22
Pole Position
iTrader: (2)
thanks for the update.
I've started to look into this also, I have PPE headers and Borla catback with hi-flow cats and I have the drone in the same RPM range. Mine isn't unbearable but I'd like to eliminate it if possible. From what I've read, its recommended that the resonators be placed as close to to the cabin as possible to cancel out the drone. Do you have any idea where you will be installing your resonators or will PPE be doing all the calculations and placement of the pipes? A muffler shop recommended replacing the mufflers on my car but I don't want to chop up my Borla system and the ISS DES looks too nice to replace.
I've started to look into this also, I have PPE headers and Borla catback with hi-flow cats and I have the drone in the same RPM range. Mine isn't unbearable but I'd like to eliminate it if possible. From what I've read, its recommended that the resonators be placed as close to to the cabin as possible to cancel out the drone. Do you have any idea where you will be installing your resonators or will PPE be doing all the calculations and placement of the pipes? A muffler shop recommended replacing the mufflers on my car but I don't want to chop up my Borla system and the ISS DES looks too nice to replace.
#23
thanks for the update.
I've started to look into this also, I have PPE headers and Borla catback with hi-flow cats and I have the drone in the same RPM range. Mine isn't unbearable but I'd like to eliminate it if possible. From what I've read, its recommended that the resonators be placed as close to to the cabin as possible to cancel out the drone. Do you have any idea where you will be installing your resonators or will PPE be doing all the calculations and placement of the pipes? A muffler shop recommended replacing the mufflers on my car but I don't want to chop up my Borla system and the ISS DES looks too nice to replace.
I've started to look into this also, I have PPE headers and Borla catback with hi-flow cats and I have the drone in the same RPM range. Mine isn't unbearable but I'd like to eliminate it if possible. From what I've read, its recommended that the resonators be placed as close to to the cabin as possible to cancel out the drone. Do you have any idea where you will be installing your resonators or will PPE be doing all the calculations and placement of the pipes? A muffler shop recommended replacing the mufflers on my car but I don't want to chop up my Borla system and the ISS DES looks too nice to replace.
#24
thanks for the update.
I've started to look into this also, I have PPE headers and Borla catback with hi-flow cats and I have the drone in the same RPM range. Mine isn't unbearable but I'd like to eliminate it if possible. From what I've read, its recommended that the resonators be placed as close to to the cabin as possible to cancel out the drone. Do you have any idea where you will be installing your resonators or will PPE be doing all the calculations and placement of the pipes? A muffler shop recommended replacing the mufflers on my car but I don't want to chop up my Borla system and the ISS DES looks too nice to replace.
I've started to look into this also, I have PPE headers and Borla catback with hi-flow cats and I have the drone in the same RPM range. Mine isn't unbearable but I'd like to eliminate it if possible. From what I've read, its recommended that the resonators be placed as close to to the cabin as possible to cancel out the drone. Do you have any idea where you will be installing your resonators or will PPE be doing all the calculations and placement of the pipes? A muffler shop recommended replacing the mufflers on my car but I don't want to chop up my Borla system and the ISS DES looks too nice to replace.
#25
Yeah it would be nice to be able to hide them behind the bumper if possible. Don't really wanna see them and I concur, I haven't seen anywhere in the mid section you could hide something that long.
#26
Pole Position
iTrader: (2)
Diesel350 - The exhaust shop made different muffler reccomendations but I wasn't interested. If I wanted to change out the mufflers, I'm better off selling off my current exhaust system and getting something else.
Tom2769- I found this video regarding J-pipes, which is supposed to work similar to a resonator:
I'm not saying its going to work, just saying what I've found so far on the internet. And, I agree, i don't want any extra pipes to be visible from the rear nor do I want it to hang any lower than my current exhaust piping. All this research has been interesting, if nothing else will work to reduce drone, I'm not opposed to going to the PPE exhaust and EL header set-up, It just seems like a waste of money so far because I've only had my headers and exhaust for less than a year and 5k miles.
Tom2769- I found this video regarding J-pipes, which is supposed to work similar to a resonator:
#27
Oh ok, they were probably recommending a bigger chambered muffler than what the borla has in order to tone down the drone. That would probably be a more expensive option than adding J-pipes to the exhaust. If the J-pipes don't work out I think your only option would be to change out your mufflers to bigger reactive mufflers or look into a twin loop type muffler.
Last edited by Diesel350; 12-29-16 at 08:24 AM.
#28
Good call, sounds like there is a small window in which you can be off and still target the resonance. Thanks for prompting the research, I spent all last night reading up on it now haha. Once I get headers and have to deal with this issue, I will hopefully be well prepared.
Good luck!
Good luck!
#29
The more you order the bigger the discount, unfortunately I didn't feel like ordering up 5 sets for myself so gave up on it. It ranged from 500-400 a set depending on how big of a batch.
#30
Yeah I did. No vendors would take on the order and CL brown holed my thread to gauge interest so that killed those dreams.
The more you order the bigger the discount, unfortunately I didn't feel like ordering up 5 sets for myself so gave up on it. It ranged from 500-400 a set depending on how big of a batch.
The more you order the bigger the discount, unfortunately I didn't feel like ordering up 5 sets for myself so gave up on it. It ranged from 500-400 a set depending on how big of a batch.