displaying posts 1 to 10 of 10

Author Subject: Is this normal?
woody.

Senior User

Location: London

Registered: 18 May 2009

Posts: 799

Status: Offline

Post #1
I've just fitted my Jetex exhaust to the 6 after buying it about 10months ago Roll eyes

This is the backbox off the previous system which was on the car when I bought it 2 years ago. It looks like it's got a bit of metal right in the middle. Is this normal??



and the backbox in question, anyone seen one like this before? :



Cheers
Posted 18th Aug 2012 at 16:55
birk

Seasoned Pro

Location: Doncaster

Registered: 24 Oct 2005

Posts: 7,032

Status: Offline

Post #2
Nope, bet that was sapping power.

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Posted 18th Aug 2012 at 17:13
woody.

Senior User

Location: London

Registered: 18 May 2009

Posts: 799

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Post #3
Yeh thought it was feeling sluggish! I've wacked that a couple times with a ratchet and it's fooking tight as well Dunno
Posted 18th Aug 2012 at 18:01
mpieczko

Regular

Location: Birmingham

Registered: 11 Mar 2009

Posts: 236

Status: Offline

Post #4
This is often how exhaust silencers are laid out.

In the second picture, look at the lateral offset between the input and output pipes.

The blind pipe forces exhaust gases to find their way out of the box by passing radially out through the perforations and baffles then out through the output shaft.

Yes, you will inevitably get a certain amount of back pressure due to such an arrangement. If you want to go faster don't fit a silencer box.
Posted 18th Aug 2012 at 18:16
woody.

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Location: London

Registered: 18 May 2009

Posts: 799

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Post #5
So in other words its pretty sh*t!? Cheers for the explanation mate, the box isn't damaged inside and feels pretty solid so its obviously meant to be there
Posted 18th Aug 2012 at 22:49
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

Status: Offline

Post #6
its not s**t, its just a standard replacement jobbie.

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Posted 18th Aug 2012 at 23:07
woody.

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Location: London

Registered: 18 May 2009

Posts: 799

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Post #7
So are the standard boxes the same design as what mpieczko said?
Posted 19th Aug 2012 at 15:31
swiftyboi006

Seasoned Pro

Location: Maidenhead

Registered: 12 Apr 2010

Posts: 2,110

Status: Offline

Post #8
Well thats not an o/e exhaust so its not the same

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Posted 20th Aug 2012 at 12:51
24seven

Seasoned Pro

Location: Derby

Registered: 05 Oct 2005

Posts: 6,221

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Post #9
Explanation of your common silencer design

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Posted 31st Aug 2012 at 15:46
woody.

Senior User

Location: London

Registered: 18 May 2009

Posts: 799

Status: Offline

Post #10
I understand, cheers for the link. I'm liking the jetex exhaust at the mo so quite glad to see the back of this Smile
Posted 31st Aug 2012 at 16:56

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