Muffler options?
#1
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Muffler options?
I have been ringing the bell on the sound meter at Thunderhill at 107db. I need to get it under 103db. I currently have a 4" round 2.5"x14" magnaflow. I have room to add another 4" round 6", 14" or 18" long muffler. I want to get under the limits but don't want to go too far and not be able to hear the car.
I am leaning towards the 14" but figured I would ask you guys first. I want to avoid doing it twice if possible.
Rotrex SC with RB header in case that makes a difference.
I am leaning towards the 14" but figured I would ask you guys first. I want to avoid doing it twice if possible.
Rotrex SC with RB header in case that makes a difference.
#4
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Fair. I daren't guess then to be honest. I'd lean towards a 6", but it would suck if you still didn't get under 103db.
Edit: I don't know why I thought the existing muffler type made any difference… 107db is 107db. Also, is temporarily attaching the cheapest 6" straight-through muffler you can find to your existing exhaust at the next event an option? I think that trying to tread a really fine line between too loud and too quiet is a bit of a crapshoot without testing.
I'm really interested in this because I'll probably run into the same problem over here when I get mine on track.
Edit: I don't know why I thought the existing muffler type made any difference… 107db is 107db. Also, is temporarily attaching the cheapest 6" straight-through muffler you can find to your existing exhaust at the next event an option? I think that trying to tread a really fine line between too loud and too quiet is a bit of a crapshoot without testing.
I'm really interested in this because I'll probably run into the same problem over here when I get mine on track.
Last edited by owenwilliams; 05-30-2012 at 05:44 PM.
#5
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Put as much turbo muffler under the car as you humanly can. Think 22x11x5 Magnaflow. 107db is serious loud, if you can use a big muffler and get it down to ~97 you'll still be able to hear it just fine.
#6
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My current exhaust terminates at the diff. I would like to keep the same overall length to leave my options open for undertray work. I have room to add another 5" x 14" or 5" x 18" round can without changing the overall layout. Based on your suggestions I will try to fit that 18" muffler.
#7
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Isn't a drive by 97db reading stock exhaust territory? Stock S2000s hit 98 on one track over here. Granted, the track undoubtably has very different measuring parameters.
In Thomas' car the wind and road noise must be massive, which is why I'm erring on the smaller muffler size if he still wants to hear it...
In Thomas' car the wind and road noise must be massive, which is why I'm erring on the smaller muffler size if he still wants to hear it...
#8
107! Darn, I just bought that same muffler! It looks like it's back to the Summit oonline order desk.
#10
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I could fit two of them with a little creativity and some tight 3" bends. It's tucked up under the left side of the rear bumper, aiming left and slightly down. It's my Laguna exhaust - I blow ~97-98dB without it, and about 84db with it.
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