ElisTwoCents

Had a few questions....

I wanted to know what makes the older B&B system loud and full of resonance?

Is it the full 3in system or the muffler themselves?

I also would like to know the differences between the old system and the new (less resonant) system?


I am picking up these B&Bs and extensions off a forum member soon and removing the Borlas. They are 3in inlet with the 4.5 inch tips, perhaps the old style mufflers?





Thanks for the help/input

1991 C4

I have a B&B system with the 3" oval tips and believe me it resonates terrible. I plan on dumping it and putting on a CORSA system. Anyone interested i'll sell the B&B cat back cheap.

Idburnu

I can't answer your question exactly, but I can tell you that the B&B system on my car is the full 3" system with the X-pipe and full length headers running upstream. I bought the car this way and as such I haven't heard the car without the X-pipe on it. The car DOES have hi flow cats on it, so that may help reduce the resonance as well, not sure.

What I can say is that I don't find it to be obnoxiously loud, or to resonate badly either. It is VERY noticeable and aggressive at idle or under throttle, but not where you feel like you are running open headers. You won't fool anyone into thinking it is stock and it is not for someone who wants to "blend in". Again it is noticeable in the car at highway speeds, not making it unbearable or where you can't talk, just to the point that if you feel the need to listen to the stereo, (who the hell cares about that with sweet cammed exhaust? ) you will have to turn it up a bit. I can say that my Flowmaster systems I have had on another Vette as well as on a few Stangs resonated worse, especially in the cars that had true duals with no crossovers.

One warning, you may not even hear the retarded guy in the Neon with the glued on quad plane wing reving at you with the 7" exhaust tip so keep an eye out for clouds of smoke coming out of the fartcan "AEM" stickered pile next to you.

timvette

I like my flowmaster 50 series. Great sound: good rumble at low rpms, nice roar at wide open throttle. Great price $240 bucks for total install w/ stock LT1 tips. Little resonance under 2000 rpm. Sets off sensitive car alarms at my parking garage at work (I LOVE THAT!).

cv67

You bastard! Gimme those please. My Z needs em

mdsd77

Having B&b's Makes Me Speak Like This
In Fact People Say I Yell All The Time !!

They Look Awesome Though.....(WELL I TYPED IT IN CAPS THE FIRST TIME)

ElisTwoCents

I thought you wanted to go with Corsas for the Z:

cv67

Impossible to find just the Corsa muffs or I would . B&B's look badazz.

1991 C4

Try here!

http://performance.thepartsbin.com/b...d=1736:thumbs:

SJW

I have the B&B 3" Triflow catback system on my otherwise-stock '94 LT1 six-speed. It has a very nasty resonance from just off-idle to almost 2k RPM. It's bad enough to keep me from cruising in sixth gear.

I took the car on a 3200+ mile trip to Key West in March of this year. Before I left, I sealed the inner exhaust port of each muffler with a plumber's test plug. This knocked the resonance out almost completely, and quieted the overall exhaust noise level noticeably (but still left a decent rumble).

This leads me to think that much of the resonance occurs as a result of the twin outlets on the B&B system (and also leads me to suspect that this may be part of the reason the Corsa system flows almost entirely out of one of the dual outlets).

If your car has an automatic trans, you might want to reconsider going with a B&B. I know that I would not be able to stand the system on my car if I didn't have the RPM control that the six speed gives me.

I have heard that there is an "early" and "late" B&B system, but I don't know if that is true, and if it is, I don't know what the differences may be, or how much resonance the "late" system induces. I suggest you contact B&B and ask them about this (please let us know what they say if you do).

Be well,

SJW

SJW

I'd be willing to bet the x-pipe has more to do with knocking the resonance back in your system. I know that TJWong fabricated and installed a custom x-pipe because the resonance of his B&B was rattling his brain. He reported that the x-pipe nearly killed the resonance.

Be well,

SJW

cv67

Very Thanks

gringoray

Billy Boat catbacks for C4's suck plain and simple. I learned the hard way and I demanded my money back and sent the Piece of sh*t back for full refund. I advice everyone on this board, Do NOT buy a B & B exhaust unless you like having serious migraine headaches!

Lichen

I have to dissagree with the above. If you have an auto with 2.59 gears, the resonance would probably get to you. Mine sounds great with headers, RT cats and Hotcam. I'm hardly ever in that small RPM range where I get resonance. Maybe it's worse in coupes.

Idburnu

I agree Lichen, and I don't think it is the coupe or vert that makes the difference, since we have similar setups exhaust and cam wise and I don't have any real issue with it either. The six speed may be the difference or an auto and gearing that puts the car at a different RPM range at cruising speeds. Sure there is a little range where it is louder and may have some resonance but nothing like these guys are describing where there lives were coming to an end from some deafening roar.

I don't know, I have never been a huge Corsa fan and after seeing the *cough* "engineering" that is inside their muffler in the pic, I am even less impressed. For that matter, if you want it quiet like grannies Buick but just need it shiny, then put on some tips on the horrid stock mufflers.

1991 C4

I see you live in the Valley. I used to live south of the college east of Reseda.

gringoray

I lived once in the SF Valley, early 90's, it was fun but quite a few Mexicans even back then, a white boy like me felt a little out of place, but it was fun!

jughead1

My ruby vert has a 2 1/2" B&B system that has been on for about five years. It resonates some from about 1500 - 1700 RPM...but very tolerable. My 94 coupe has the "newer" 2 1/2" system that has been on a little over two years and resonates zip..nada..nothing. The systems look exactly the same but there is some diference. I was always led to believe that a coupe would resonate worse thatn a vert. If that is true...go figure.

Raysur

You can tell if you have an older system if the tips don't have restriction plates. Newer systems have plates that have to be ground down. The newer mufflers are also a different design in which it muffles sound. It still is a loud system. They aren't for wheel and waxer crowds.

I must warn you, B&B is a performance system. If you are looking for a little more growl without issues don't install those mufflers.

89Corvette6spdFX3

To my understanding, there are two different systems with the B&B. One is a lot more quiet than the other.

I will say I saw a set on a 96 and it got me drooling! This is what I ended up with after that.