AuthorTopic: 3.5 exhaust noise?  (Read 2149 times)

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Offline v8rangie

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3.5 exhaust noise?
« on: November 15, 2007, 08:53:27 »
just got myself a V8 rangie and want it to sound like a V8 should.

are there any cheap options out there to make it sound good?

can't really afford a 500 pound system just yet.


I have heard of taking out the centre box? does this make much difference?

anaxemurderer

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3.5 exhaust noise?
« Reply #1 on: November 15, 2007, 10:21:54 »
I have just the centre box on mine, the rest was removed with the bobtail. To be honest i would like it to be abit louder. It does sound good though and has made a difference. When it next blows the exhuast or when i feel flush i'll straight pipe it.

Nick

ps search 'yellow bobtail' on youtube and watch 'playing with the toy'. If your speakers are any good you'll be able to hear it.

Offline Bowie

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3.5 exhaust noise?
« Reply #2 on: November 15, 2007, 10:22:08 »
*DON'T* take the centre box out, it will sound horrid and not give the correct back pressure the engine requires.

If you are to remove anything, take the rear silence off, if needs be replace with a straight through item -this is where most of the silencing it done.

Bowie.
1980 SIII Lightweight 2.25 Petrol - completely standard.
1991 Range Rover Vogue SE 3.9 V8 - now on LPG (sorted!), 2" lift, mud tyres, and more to come...

Offline v8rangie

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3.5 exhaust noise?
« Reply #3 on: November 15, 2007, 10:44:55 »
cheers guys was gonna ask what it would do to the engine pressure.

if I tak the back box off and replace with a pipe what would this do for MOT?

also what is the best pipe to use? is there anything out there already made which would pretty much fit?

Offline Range Rover Blues

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3.5 exhaust noise?
« Reply #4 on: November 15, 2007, 13:42:03 »
When we got Blue it had a TDi centre box and nowt else.

I got tired of the noise though in the end :(mad):
Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

Offline DEANO3528

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3.5 exhaust noise?
« Reply #5 on: November 17, 2007, 00:32:19 »
Quote from: "Bowie"
*DON'T* take the centre box out, it will sound horrid and not give the correct back pressure the engine requires.

If you are to remove anything, take the rear silence off, if needs be replace with a straight through item -this is where most of the silencing it done.

Bowie.


Erm, go take a look under one.

The rear box is already a 'straight thru' type!
I did have just the single pipe rear box on my pick-up. The restrictor type front box has more to do with hushing up the V8 than providing back pressure. Being a pick-up, resonance within the cabin is not a problem.
Shed has two single pipe rear boxes, one in place of that ½ ton piece of junk front box and sounds like this

And if you go on Youtube and type in 'Fun with SLROC' or 'More Fun with SLROC' there are clips of Shed doing what it does best.
Cheers
DEANO


Offline Bowie

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3.5 exhaust noise?
« Reply #6 on: November 17, 2007, 01:03:26 »
OK, when I say 'stright through' in this case, I mean a 'cherry bomb' type silencer, which does everything BUT silence the exhaust....

It does sound nice, but someone had replaced my middle box with piece of pipe......

a) it sounded cack,

b) it screwed up the back pressure, when I changed it, the engine was totally different.......................................

So.... don't remove the middle box ;)
1980 SIII Lightweight 2.25 Petrol - completely standard.
1991 Range Rover Vogue SE 3.9 V8 - now on LPG (sorted!), 2" lift, mud tyres, and more to come...

Offline Range Rover Blues

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3.5 exhaust noise?
« Reply #7 on: November 17, 2007, 01:13:34 »
My sports pipes both have 2 straight through boxes on them, rather than the centre one being the staggered type.

Lets a lot more smoke through on startup :? , had me worried at first.
Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

Offline Brian the Sn@il

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3.5 exhaust noise?
« Reply #8 on: November 19, 2007, 11:09:52 »
I have taken the rear box off mine, and has made only a slight difference with noise.

Next job is to do something with the centre box, not sure what yet as im still looking into it.
THe way to go would to be to take out the Silencer wadding from the box. So that would leave the back pressure there but let the noise travel through ;)

Like i say im still looking into it ;)
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1994 EX MOD 110 Defender

Offline kemo

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3.5 exhaust noise?
« Reply #9 on: November 19, 2007, 13:02:47 »
as the rover v8 is a buick engine i put a american turbo muffler in mine and now it sounds like a yank is suppossed to sound and at a cost of £29.00

Offline Brian the Sn@il

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3.5 exhaust noise?
« Reply #10 on: November 19, 2007, 15:20:14 »
Where did you manage to buy a Amercican Turbo Muffler from ?
Jeep Grand Cherokie V6 2006
1994 EX MOD 110 Defender

Offline kemo

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3.5 exhaust noise?
« Reply #11 on: November 19, 2007, 15:33:36 »
Quote from: "Brian the Sn@il"
Where did you manage to buy a Amercican Turbo Muffler from ?




 Dave Eadys American Auto Parts
 Higham Road
 Burton Latimer
 Kettering
 Northahants

 Tele 01536 420201

Offline Brian the Sn@il

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3.5 exhaust noise?
« Reply #12 on: November 19, 2007, 16:10:46 »
Quote from: "kemo"
Quote from: "Brian the Sn@il"
Where did you manage to buy a Amercican Turbo Muffler from ?




 Dave Eadys American Auto Parts
 Higham Road
 Burton Latimer
 Kettering
 Northahants

 Tele 01536 420201


Many Thanks :)
Jeep Grand Cherokie V6 2006
1994 EX MOD 110 Defender

Guardian.

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3.5 exhaust noise?
« Reply #13 on: November 19, 2007, 18:09:12 »
what is an american muf turbo thingy?

 






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