B&B exhaust tabs..help

[Dean400hp]

anyone run into the problem of rubber stoppers breaking away from tabs that hold pipes to frame of car ?

Dean

[jpoole]

Happened to me. I emailed B&B and they shipped some more out to me.

[mooreman6]

I recently installed the B&B system on my 05-V. The original GM exhaust does not mount to the car, the rear hangers hold the weight of the system up. I was wondering if the same could be done for the B&B, although I have not tried (I have the rubber mounts also). I realize the GM system is one-piece, and the B&B is several pieces held together by bolts, etc. My thoughts are that the rubber mounts may be transmitting some amount of noise or vibration into the cabin. Anyone tried running without the mounts?

[Bueller]

HMMM. I bought my B&B used and slid the muffler tabs into the stock rubber hangers. It didn't come with any other rear mounts other than what is welded to the muffler. No problems here.

[keithsm2]

anyone have a loud resonance or drone in 6th gear between 50 and 60 mph???

I end up using 5th gear more.....maybe the mounting could be changed??

[heavymetals]

Originally Posted by keithsm2

anyone have a loud resonance or drone in 6th gear between 50 and 60 mph???

I end up using 5th gear more.....maybe the mounting could be changed??

I don't use 6th until I am at 62 as the drone when adding gas at that speed is a little objectionable.

[mooreman6]

Bueller, the mufflers do mount to the existing rear rubber hangers. The resonator has a hanger molded to it that screw into the belly of the car where the original piece of aluminum with two bolts went. That piece was about 12 inches wide. Also, Keithsm2, I have the drone in 6th around 50mph or so.

[Crawler]

I wouldn't worry about the drone at 50 in 6th. I'd worry about the fuel mileage.

I don't know about your V but mine better be at 55 or better to use 6th. Otherwise my mileage tanks.

~WS~

[PISNUOFF]

I have the drone also. It really coincides with about 1500 rpm's more than any distinct vehicle speed. I was thinking about sound deadening the trunk area and under the rear seat. Has anyone else done this, and did it help any?

[GMBOUND]

Originally Posted by Crawler

I wouldn't worry about the drone at 50 in 6th. I'd worry about the fuel mileage.

I don't know about your V but mine better be at 55 or better to use 6th. Otherwise my mileage tanks.

~WS~

I jump into 6th while obeying the 40MPH speed limit while in the residential area before I make it to the freeway.

I thought I was saving gas by keeping my RPMs down.

Originally Posted by PISNUOFF

I have the drone also. It really coincides with about 1500 rpm's more than any distinct vehicle speed. I was thinking about sound deadening the trunk area and under the rear seat. Has anyone else done this, and did it help any?

Trunk, Self panel and just under the rear seat is sound deadened. Makes a difference but not much.

Originally Posted by Dean400hp

anyone run into the problem of rubber stoppers breaking away from tabs that hold pipes to frame of car ?

Dean

NO

[keithsm2]

I checked my instant mileage at 60 mph...between 5th and 6th gear........6th gear provided the best mileage....by 3 or 4 mpg at least..

[Dean400hp]

I talked to B&B and they are sending me new ones...great guys!
Only problem is I screwed a bolt in there temporarily and it freak'n snapped!
can the dealer get it out and still be able to put correct threading in frame part?

[Crawler]

Originally Posted by keithsm2

I checked my instant mileage at 60 mph...between 5th and 6th gear........6th gear provided the best mileage....by 3 or 4 mpg at least..

Mine was exactly the opposite.

Maybe it has to do with LS2 vs LS6.

??

~WS~

[atdeneve]

Dude, check it again. Regardless of vehicle/engine/fuel/whatever, you'll always get better gas mileage when coasting in a higher gear, at any given speed.

Try this. Hop on a bike and pedal for a mile in 1st gear. Now do it again, but in the highest gear. Which one was easier? Yup. So, which one do you think expended more fuel. There you go. With the amount of energy you spent pedaling for one mile in first gear, you could have probably gone ten miles in the highest gear, without breaking a sweat.

[Bueller]

Originally Posted by mooreman6

Bueller, the mufflers do mount to the existing rear rubber hangers. The resonator has a hanger molded to it that screw into the belly of the car where the original piece of aluminum with two bolts went. That piece was about 12 inches wide. Also, Keithsm2, I have the drone in 6th around 50mph or so.

Gotcha,

Mine has a different setup at the resonator, I got it used. I know it didn't come with this mount. It is a rubber mount with a threaded bolt out of both sides. This screws into the stock location and has a rubber bushing between the tabs with a nut holding it on the other side. Like a 2 sided threaded rod with a rubber center. Works well and allows a bit of movement like the muffler hangers.

I have the 2.5" touring and no drone but it is kinda quiet all the time, just deeper than stock.

As for 6th when going slow, I think your mileage would be worse too. Try the same bicycle test when going very slow. Go a mile at 1 mph in low gear, then go the same mile in top gear when it is very hard to turn to start off, and continue at low speed. Keep going slow and your legs will kill after that mile in top gear, and you barely have to put any effort into getting it to crank over in low gear, although it goes around many more times. Lugging the motor is not efficient.