Burble between gear changes or engine braking.. Mixture out??

[jokerflingo]

i thought this was normal for an engine my mates vz ss ute when he idles down going down gears at night u can sometimes see flames coming out his exhaust, he has pacemakers into dual 2 1/2 inch with high flow cats into twin dumpers

V8's are more known to do it then V6's :thumbsup:

 

[rocco555]

is normal, nothing wrong, if you like the sound of it then just enjoy it

to get rid of it you'll have to make changes to your exhaust system (mufflers etc.)

 

[Immortality]

V8's are more known to do it then V6's :thumbsup:

it's to do with firing order and the pressure waves colliding in the exhaust. it's the same reason why LS1'a sound puss from the factory. they changed the firing order to smooth things out

 

[GTP 85]

I get the burble/ popping in my VN 5 speed. i love it haha

 

[M01ST]

I get it in my vs on some occasions only ever when Ive been driving longer then 30 minutes

 

[JA2Z]

Ok update.

I definately agree the burble sound is quite good, but something is not quite right, this is too loud.

So, I nipped up the Cat bolts quite hard let her idle to op temp then took her out for a hard drive....

Drove around for a bit and for the first bit good then, the same..... rev--- 3,500 - 2nd - rev--- hit about 3,000 and it started the load burble (aeroplane) sound again -- 5,000 - 3rd - Sh*t better slow down --- burble, burble, fart, burble - stop.

Drove home and left her and didn't think about it again for a while. took her out later that night.......

Fixed... Still had a beautiful rumble and burble when driving, but that aeroplane sounding note was gone. i guess it was the gaskets leaking, not tight enough, being nipped up tighter and heated up and cooled down must have set them in place. And that's all it needed.

Cheers

 

[maldotcom2]

I put a smear of muffler putty on both sides of my exhaust gaskets. :dance: