I have a B&B triflow catback on my 95 LT1 that is absolutely deafening, has anyone come up with a way to quiet it to a reasonable volume?

Thanks John

 

yea, get a Corsa.

 

thanks lol

 

Single tips or duals?

Jake

 

dual tips

 

The resonance from the B&B system can be really bad especially with the 3" version. B&B has a smaller system and there is supposed to be a different resonator you can get (at a price) that will help with the resonance.

My system is about 4 years old and I still can't get used to the resonance inside the car with the vert top up. It's better when I have my hardtop on, but that is not a solution in the summertime.

Maybe I'll pull the system and replace it with a Corsa system oneday.

 

I went for a ride in Bogus' LT1 the other day, and I could not believe how quiet it was inside!! I was impressed! That is (Corsa)truly a no resonance system

 

Since you used such powerful terms as "absolutely deafening" I take it literally. Here's what I had to do and is a quick fix:

Fire the engine, then go to the back and ID which tip has the most exhaust flow; one tip on each side.

Stuff that one with balled up aluminum foil; three or four ***** in each tip should do it. Use a broom handle to pack the ***** in.

That should quiet it down enough until you can make a move to something quieter or make some other mods to the exhaust. At least you'll be able to live with the car until you are able to finalize a fix.

You can do lots of other things but they seem to have negligible results. Balance tubes, X tubes,. etc.

Some resort to installing round, straight throught muffler(s) in place of the CAT(s). Like those sold for race cars that run on tracks with sound restrictions. DynoMax, DynaTech, FlowMaster, Moroso, etc., all sell 'em. They're very free flowing, so won't present much of a restriction, but they seem to be able to tame annoying exhaust tones.


Jake

 

Heeeey ! Get Vertex cones and put them in the headers or inside the 3inch B&B exhaust !

 

do you have any info on the cones? Ive never heard of them

 

There are a few different versions of them.

Car Chemistry sells two different versions. One is called Collector Inserts for $46 to $73 each, depending on the size you need and how many disc (2 or 3). The other version didn't have a name next to it but goes for $63 to $74.

DynaTech sells an couple of different versions, too. The Vortex Insert Cones go for between $60 and $80, again depending on the diameter you need. Their Turn Down with Cone Inserts are about $80.

I know JEGS has them and I suspect SUMMIT does too (Summit's prices will probably be better). I don't know well they work though.

Hope this helps.

Jake

 

I run a B&B exhaust system in my 85 and it "was" very loud (almost deafening when I installed the headers) until I had sound deadening insulation installed everywhere in the interior.

I used 99 sq. ft. of FatMat insulation in the interior and in addition to that, also two rather thick pieces made to be placed under the driver and passenger's seat and foot area. The difference was incredible. In my opinion, FatMat parallelled Dynomat's functionality, but at a fraction of the price.

If you don't have any type of sound insulation, beside what the factory installed (which doesn't do that much), install it and I can virtually guarantee you will notice a huge difference in the volume. It will still be quite loud to those outside your vehicle, but you'll be comfortable when inside your car.

 

Plugging one outlet on each muffler helps........4.10 gears help.....earplugs help a lot/they were std equipment in my car..

The ONLY real solution is to replace it ........talk to B&B, maybe they would make you deal on their new 3" resonator/mufflers...but I doubt it

B&B should be "hung" for ever bringing their original system to market....

It brings a new meaning to resonance......

 

seemed to think I was joking.

 

He may have, but from all I've read that's the right answer.

Maybe the cost is gettin' in the way. I know it is for me.

Jake

 

it's the cost thats keeping me from doing it, hell, if I had access to the stock catback I'd install that! the B&B came with the car when I bought it

 

Do you have an automatic? Most complaints I have seen with the exhaust have all been by owners driving an auto. The B&B is really best suited for a stick car because of the resonation down low. Unfortunately, most autos spend most of their time below 2200 rpms unless you feel like manually shifting the car.

Personally, I love mine. I don't think there is a better sounding exhaust on a C4... especially with long tubes, x-pipe and no cats. It's a sound to be reckoned with that's for sure

Mike

 

Probably good advice, and probably would work - but there is no way in heck i'd stuff aluminum foil ***** up by exhaust with a broomstick.

 

I read several years ago about B&B sending out plugs to plug one tip on each side. Don't know if they will still do that.

The alternate method, suggested by someone on the forum, is to go to the plumbing section of your local home improvement store and find 3-inch closeout plugs. These consist of two circular metal plates sandwiching a circular hunk of rubber about 1/2 inch thick, with a bolt through the center of them all and a wingnut on the bolt. As you tighten the wingnut, the metal plates compress the rubber and it squishes out around the outside. As these things are designed to plug pipe ends and the like, the diameter of one of the metal plates is larger than the diameter of the rubber (which is about 3 inches), and the diameter of the other metal plate is a little smaller than the diameter of the rubber (at least the ones I got at Home Depot were like this). If you buy two of these and swap the small plate on one for the large plate on the other one, you can use the one with the two small plates to plug one of the exhaust tips. You tighten the wingnut until you can just barely fit the plug into the exhaust tip, then after it's in you tighten the nut some more to hold it in place (I use a wrench to do the final tightening). If you buy 4 plugs at the store, you can plug one tip on each side (I guess you could just get two and cut the larger metal plate on each one, but they weren't very expensive, so I got 4 to save time). I got some flat black barbeque paint and painted the surfaces facing out of the exhaust so they blend in with the soot.

Plugging one tip on each side does cut the resonance down considerably, to about 1/4 of what it was. It's enough difference that it's tolerable on a long trip. Since I like the sound of the exhaust except when it's droning on while cruising down the freeway, I just put the plugs in for long trips, and take them out otherwise. It only takes a minute or two to put them in or take them out. The plugs do affect the engine response to the throttle a little, so they presumably cost a little power, but I wouldn't guess it's that much (less than turning on the air conditioner I'd think), and I haven't noticed any significant change in mileage with them in either.

 

Thanks to all who responded... Jeff, your pipe plug suggestion was genius, I put them in and immediately the sound became great... loud enough outside, and quiet enough inside! thanks for the great suggestion!
John