Very quiet turbo exhaust - LFN sensitivity
#43
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Lets agree that adding more things to the exhaust that are not straight pipe will make it quieter, mmkay?
If I added a cat to my exhaust (move resonator back, add cat where resonator now lives) it would get quieter. If I added another resonator downstream of the current resonator, it would get quieter. If I added a flapper thing to my exhaust, it would get quieter. If I added a resonated exhaust tip to my exhaust it (might) get quieter. Anything that isn't a straight pipe is going to make it quieter.
The practical concern is how you are going to fit and support all this **** under the car
If I added a cat to my exhaust (move resonator back, add cat where resonator now lives) it would get quieter. If I added another resonator downstream of the current resonator, it would get quieter. If I added a flapper thing to my exhaust, it would get quieter. If I added a resonated exhaust tip to my exhaust it (might) get quieter. Anything that isn't a straight pipe is going to make it quieter.
The practical concern is how you are going to fit and support all this **** under the car
#45
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OP is getting an MKTurbo setup. Right now we are just trying to figure out how much to spend on adding resonators and what type. He is the first person to want to go even quieter then just the giant magnaflow muffler.
#46
Well, Shuiend has said, tentatively, he thinks he can fit 18" X 5" resonator like EO2K, and a second 12" X 4" resonator, plus the magnaflow, so maybe I should stop overthinking it and just go with that.
EO2K, was there a reason you went with the regular bottle vibrant over the "ultra quiet" one?
EO2K, was there a reason you went with the regular bottle vibrant over the "ultra quiet" one?
#52
Also, just for reference, I called Magnaflow and spoke to their sales engineer, and he said that the resonators do not utilize offset pressure waves to cancel sound, but rather just absorb vibrations using the packing. I think only chambered mufflers and Hemholtz resonators use destructive interference to reduce sound.
#53
From 2005:
https://forum.miata.net/vb/showpost.php?p=1429799&postcount=15
I think I had it installed it in 2002. This was my first attempt. I had it redone with an even bigger Magnaflow, which I then kept for many years until upgrading to bigger trubo and 3" exhaust... which needed the flapper to cut the bass.
No I was the first. I was also one of the first ones to use the giant-*** Magnaflow, before it became common. Back when I had a 2.5". It was quiet enough, with a resonator and high flow cat. When I went 3", it was too bassy, so I added the flapper.
#55
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I have the giant magnaflow on one of my naturally aspirated miata's. It is 2.5" pipe with 2 2.5" resonators. Thing is quieter then stock and most people don't believe me when I tell them the exhaust is that large on a naturally aspirated car. I was very surprised how nice it sounded.
#56
Can confirm that my Vibrant Ultra Quiet resonator/muffler is the same way (This one: Vibrant Performance ::. ). 2.5" O.D., internal is like 2" I.D.... I don't like it, but Vibrant and Borla are doing it. I don't have the entitlement to dispute Borla's design, but not everyone has that self-control. Both companies offer a good product though, I have been satisfied with both in a couple different applications.
My Vibrant Large Body 3" x 18" Bottle Style Resonator PN 17950 was NOT built as you describe. It's full 3" all the way through the core
#59
Anybody ever heard of these? They have little louvers to capture more frequencies. Stupid expensive though.
https://solo-performance.com/qr-resonator-series
https://solo-performance.com/qr-resonator-series