Need SLP LM to drop about 10-15 DB HOW??
#1
TECH Apprentice
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Need SLP LM to drop about 10-15 DB HOW??
I failed inspection for "excessive noise" The limit is 95 DB @ 2500 RPM.... I had 102.5 DB I've been reading other forums but I can't seems to find any information about quieting down a loud mouth. I'd like to know from dynomouth and borlamouth owners what the difference sound wise is? I can't drive the car until its fixed so HELP HELP HELP!!!
Exhaust experts: What muffler would you recommend to drop 10-15 DB or more without sacrificing much performance? Should the muffler take the resonator's spot or be welded in elsewhere?
THANKS IN ADVANCE!!!!
Exhaust experts: What muffler would you recommend to drop 10-15 DB or more without sacrificing much performance? Should the muffler take the resonator's spot or be welded in elsewhere?
THANKS IN ADVANCE!!!!
#2
Tech Resident
I failed inspection for "excessive noise" The limit is 95 DB @ 2500 RPM.... I had 102.5 DB I've been reading other forums but I can't seems to find any information about quieting down a loud mouth. I'd like to know from dynomouth and borlamouth owners what the difference sound wise is? I can't drive the car until its fixed so HELP HELP HELP!!!
Exhaust experts: What muffler would you recommend to drop 10-15 DB or more without sacrificing much performance? Should the muffler take the resonator's spot or be welded in elsewhere?
THANKS IN ADVANCE!!!!
Exhaust experts: What muffler would you recommend to drop 10-15 DB or more without sacrificing much performance? Should the muffler take the resonator's spot or be welded in elsewhere?
THANKS IN ADVANCE!!!!
To make the math easier, we'll say you need to drop it 9 dB, which is half the loudness, then half of that, then half of that. So it needs to be EIGHT TIMES QUIETER. In reality, it's more like 6 or 7 times quieter to just squeeze by. Keep that in mind.
You need cats and a whole new catback in order to do that. That may not even be enough. Sounds like it's new catback + cutout time
If you only want a muffler and not a whole catback, your only options in reality are a Magnaflow muffler, a Hooker muffler or an SLP dual/dual muffler. Bullets will NOT help in this case, so don't waste your money on them.
#4
10 Second Club
iTrader: (1)
Join Date: Sep 2007
Location: In Uranus!
Posts: 1,500
Likes: 0
Received 0 Likes
on
0 Posts
[QUOTE=ChocoTaco369;7917535]Well, first thing you need to understand is that every 3 dB is double, so if your exhaust was 98 dB, it would be twice as loud as the legal limit.
To make the math easier, we'll say you need to drop it 9 dB, which is half the loudness, then half of that, then half of that. So it needs to be EIGHT TIMES QUIETER. In reality, it's more like 6 or 7 times quieter to just squeeze by. Keep that in mind.
You need cats and a whole new catback in order to do that. That may not even be enough. Sounds like it's new catback + cutout time
If you only want a muffler and not a whole catback, your only options in reality are a Magnaflow muffler, a Hooker muffler or an SLP dual/dual muffler. Bullets will NOT help in this case, so don't waste your money
I don't know?? I have the magnaflow exhaust on my car. It's pretty quiet at idle but now that I have the headers on and the car is catless. It's pretty damn loud when I get on it!! @ 2500 rpm the damn rearview mirrior vibrates.
To make the math easier, we'll say you need to drop it 9 dB, which is half the loudness, then half of that, then half of that. So it needs to be EIGHT TIMES QUIETER. In reality, it's more like 6 or 7 times quieter to just squeeze by. Keep that in mind.
You need cats and a whole new catback in order to do that. That may not even be enough. Sounds like it's new catback + cutout time
If you only want a muffler and not a whole catback, your only options in reality are a Magnaflow muffler, a Hooker muffler or an SLP dual/dual muffler. Bullets will NOT help in this case, so don't waste your money
I don't know?? I have the magnaflow exhaust on my car. It's pretty quiet at idle but now that I have the headers on and the car is catless. It's pretty damn loud when I get on it!! @ 2500 rpm the damn rearview mirrior vibrates.
#5
12 Second Club
iTrader: (10)
keep your foot out of it lmao...good luck in your search tho...i think you can go to www.ls1sounds.com and there are links to different exhaust sounds...
Trending Topics
#8
TECH Fanatic
Find a different inspection shop for God's sake. What did you expect from the LM1? I'm sure there are plenty of redneck mechanics out there who would think your car is cool and not care about the dB check.
#9
TECH Resident
iTrader: (5)
Join Date: Sep 2006
Location: Long Island, NY
Posts: 822
Likes: 0
Received 0 Likes
on
0 Posts
I failed inspection for "excessive noise" The limit is 95 DB @ 2500 RPM.... I had 102.5 DB I've been reading other forums but I can't seems to find any information about quieting down a loud mouth. I'd like to know from dynomouth and borlamouth owners what the difference sound wise is? I can't drive the car until its fixed so HELP HELP HELP!!!
Exhaust experts: What muffler would you recommend to drop 10-15 DB or more without sacrificing much performance? Should the muffler take the resonator's spot or be welded in elsewhere?
THANKS IN ADVANCE!!!!
Exhaust experts: What muffler would you recommend to drop 10-15 DB or more without sacrificing much performance? Should the muffler take the resonator's spot or be welded in elsewhere?
THANKS IN ADVANCE!!!!
#11
Tech Resident
#12
TECH Fanatic
iTrader: (1)
Join Date: Aug 2006
Location: DE La Ware
Posts: 1,094
Likes: 0
Received 0 Likes
on
0 Posts
The cheapest solution.... Steel wool. I failed and then stuffed each tail pipe with about a foot of steel wool. I had dual dual tips so it was hard to see. If you have shotgun tips you may be able to get away with it. I bought some steel wire and slipped it over the pipe and then put the tip over the wire so the wool didnt come out.
#13
Tech Resident
The cheapest solution.... Steel wool. I failed and then stuffed each tail pipe with about a foot of steel wool. I had dual dual tips so it was hard to see. If you have shotgun tips you may be able to get away with it. I bought some steel wire and slipped it over the pipe and then put the tip over the wire so the wool didnt come out.
#14
Launching!
iTrader: (6)
Join Date: Feb 2007
Location: Dover, Delaware
Posts: 257
Likes: 0
Received 0 Likes
on
0 Posts
I just installed a 29inch regular glass pack and my car now sounds like a honda instead of a mean *** LS1 with loudmouth exhaust. I will let you know tuesday if i make it through inspection.