redback exhaust...and lame excuse by mechanic

[Mohi]

hi ,i had a redback single cat exhaust with a rear resi fitted on my vy v6 auto (dual fuel), its an off the shelf model and before i had it fitted the exhaust guy said that it wont drone as he is gonna put the rear resi with twin outs , but after getting it fitted it bloody drones alot when i went back to him about the droning , he gave some kind of a crap excuse that the muffler got fiberglass packed in some kind of plastic bags and to get to full output the plastic bags have to pop and the fiberglass will expand and than i will see a lot of difference in the droning thing and he says its gonna take around 700kms to do that , since getting my exhaust system fitted , i had driven rnd 580kms , including driving 400ks in a single day , but i havent had any change in droning ,

Is there a way to fix it , as at 60 and 80kmph it drives me crazy ,,

 

[undersuspicion]

hey mate, i may be wrong, but when it comes to exhausts you generally get what you pay for.

 

[VLC86]

Supposedly exhaust systems do take some time to 'break in' but 700 km's does sound a bit much.

Unfortunately because you have a v6 it is going to drone no matter what, so there isnt much you can do except change systems to maybe.

How much did you pay for it?

 

[Cameron P]

does it have a muffler before the rear resi?

keep in mind your auto trans makes your exhaust drone abit compared to a manual trans'd commodore

 

[Cameron P]

Supposedly exhaust systems do take some time to 'break in' but 700 km's does sound a bit much.

Unfortunately because you have a v6 it is going to drone no matter what, so there isnt much you can do except change systems to maybe.

How much did you pay for it?

not all v6's drone mate

 

[VYHDT]

sure its a redback???.. i got one and no drone here

 

[VLC86]

not all v6's drone mate

Majority of them will unless you get a high quality exhaust system.

Also, the combination of other things affects it. (headers, cat, trans, engine condition)


Sent from my Desire HD using Tapatalk

 

[nathanVY]

The "break in" time sounds about right, although it's usually 2-3 weeks of normal driving for it to wear in.

I've even noticed it with my custom system the sound has "seasoned" a bit after a few months.

Red backs drone mate, the exhaust guy should've been upfront about it... but having said that I had a VR with a redback on it, droned like helll. stuck a resi on it and it was much nicer and bearable, that was the big fat resi though not the little hot dog one

 

[Cameron P]

Majority of them will unless you get a high quality exhaust system.

Also, the combination of other things affects it. (headers, cat, trans, engine condition)


Sent from my Desire HD using Tapatalk

it all comes down to you get what you pay for as 'undersuspicion' said

 

[undersuspicion]

to get rid of the drone mate, take the redback catback, throw it in the bin and get yourself a good exhaust system with headers and hi flow cat/s. Easiest solution and it will make your car sound better than with just the cat back.