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Ian Johnston
Goo Roo
South Australia
UZZ30 GT 4.0, BA XR6Turbo Ute. 2007 VE GTS.

Posts: 1431
Reg: 07-2005

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Tuesday, October 18, 2011 - 07:41 pm, by:  Ian Johnston (Ted) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Decided I needed a bit of noise out of my V8, so got the rear mufflers removed, and straight pipes fitted with original tips.
Jeez, those centre, or front muffler must be restrictive, not much louder than standard.
I didnt want great amounts of noise, but thought it would be louder than it is.
James Buchan
Goo Roo
Vic
V8

Posts: 1199
Reg: 10-2008

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Wednesday, October 19, 2011 - 07:51 pm, by:  James Buchan (Jrbuch) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

You're not wrong, the stock exhaust is very quiet.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 12218
Reg: 11-2004

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Thursday, October 20, 2011 - 11:58 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I would have suggested to keep the rears and remove the other 3. :-)
Ian Johnston
Goo Roo
South Australia
UZZ30 GT 4.0, BA XR6Turbo Ute. 2007 VE GTS.

Posts: 1432
Reg: 07-2005

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Friday, October 21, 2011 - 09:09 am, by:  Ian Johnston (Ted) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I wondered that too Peter. I still have the rears, as I had a spare set we cut up, so may look at that later.
I dont want it as load as yours though
Dave Rose
Goo Roo
wa
uzz31 v8

Posts: 1711
Reg: 03-2007

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Friday, October 21, 2011 - 10:44 am, by:  Dave Rose (Sand_groper) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

http://planetsoarer.com/V8exhaustmeasurements/Soarer_v8_exhaust_measurements.htm
Sean Routledge
DieHard
Victoria
V8 Limited

Posts: 853
Reg: 07-2008

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Friday, October 21, 2011 - 08:24 pm, by:  Sean Routledge (Stircrazy) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mine's much louder than stock with the rear mufflers removed. 83db stock, compared to 103db with the rear mufflers removed.
Although it reached 103db on back off. I think it was around 97db before back off.
Ian Johnston
Goo Roo
South Australia
UZZ30 GT 4.0, BA XR6Turbo Ute. 2007 VE GTS.

Posts: 1433
Reg: 07-2005

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Friday, October 21, 2011 - 08:47 pm, by:  Ian Johnston (Ted) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I am not that unhappy that I will bother to take off the rest at the moment. At least now you know its a V8
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5415
Reg: 11-2005

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Friday, October 21, 2011 - 09:28 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Peter Nitschke wrote on Thursday, October 20, 2011 - 11:58 pm:



Peter Nitschke wrote on Thursday, October 20, 2011 - 11:58 pm:

I would have suggested to keep the rears and remove the other 3.




Correct.

The part that makes any V8 system quiet is when the two banks have a balancer or single pipe section... really drops the rubble/noise in general.
Scott Vim
TryHard
Vic
Soarer (1uz) Chaser (1jz)

Posts: 197
Reg: 12-2010

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Saturday, October 22, 2011 - 12:37 am, by:  Scott Vim (1uz1jz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Sean what are you running? stockie with rears removed?
Glen Muller
DieHard
Victoria
Soarer - 'Z31 V8

Posts: 874
Reg: 12-2007

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Saturday, October 22, 2011 - 03:23 pm, by:  Glen Muller (Doom_and_gloom) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Peter Nitschke wrote on Thursday, October 20, 2011 - 11:58 pm:

I would have suggested to keep the rears and remove the other 3.




I'd do that too. Apparently it sounds pretty good.
Sean Routledge
DieHard
Victoria
V8 Limited

Posts: 856
Reg: 07-2008

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Saturday, October 22, 2011 - 06:05 pm, by:  Sean Routledge (Stircrazy) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Scott Vim wrote on Saturday, October 22, 2011 - 12:37 am:

Sean what are you running? stockie with rears removed?


Yeah mate. Dead stock with rears removed and quad tips. Sounds better than stock, but would love the note to be a bit deeper.
Glen Muller
DieHard
Victoria
Soarer - 'Z31 V8

Posts: 876
Reg: 12-2007

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Saturday, October 22, 2011 - 08:43 pm, by:  Glen Muller (Doom_and_gloom) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I have a video on my Youtube account of my Soarer with no rear mufflers, for anyone who is curious. I was going to leave it like that, but I ended up making my own cat-back.

http://www.youtube.com/watch?v=_SE-oUz5feI
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 12220
Reg: 11-2004

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Tuesday, October 25, 2011 - 08:44 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Ian Johnston wrote on Friday, October 21, 2011 - 09:09 am:

wondered that too Peter. I still have the rears, as I had a spare set we cut up, so may look at that later.
I dont want it as load as yours though


How about just get the centre resonator deleted?

So it goes manifold - cats - mid muffs - rear muffs.

No mixing between banks will increase thump, but the 4 mufflers will keep it under control.
Ian Johnston
Goo Roo
South Australia
UZZ30 GT 4.0, BA XR6Turbo Ute. 2007 VE GTS.

Posts: 1436
Reg: 07-2005

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Wednesday, October 26, 2011 - 07:47 pm, by:  Ian Johnston (Ted) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yeah, it does sound like a group A car at the moment. Not a real V8 sound. Might check that out with my exhaust bloke.
I am getting to like it how it is, dont want it too loud. Will get it out, and see how it sounds. Can allways put it back
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 12225
Reg: 11-2004

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Thursday, October 27, 2011 - 09:09 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I think it will be a great result. Burble without so much volume - looking forward to you getting it done!
Glen Muller
DieHard
Victoria
Soarer - 'Z31 V8

Posts: 880
Reg: 12-2007

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Friday, October 28, 2011 - 08:22 am, by:  Glen Muller (Doom_and_gloom) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Peter Nitschke wrote on Tuesday, October 25, 2011 - 08:44 pm:

How about just get the centre resonator deleted?




Are you suggesting running straight from each cat to the muffler, leaving each side of the exhaust independent from the other? I think that would probably sound pretty good. That centre resonator ruins the note, and without it the car would probably have a much more throaty note without the offensive volume.
Glen Muller
DieHard
Victoria
Soarer - 'Z31 V8

Posts: 881
Reg: 12-2007

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Friday, October 28, 2011 - 08:25 am, by:  Glen Muller (Doom_and_gloom) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

http://www.youtube.com/watch?v=40JtLuvXU5o

No resonator. Sounds pretty good!
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 12230
Reg: 11-2004

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Saturday, October 29, 2011 - 02:58 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Glen, yes. Leaving 2 mufflers each side should keep the noise down, removing the centre mixing resonator should give great burble.
Glen Muller
DieHard
Victoria
Soarer - 'Z31 V8

Posts: 882
Reg: 12-2007

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Saturday, October 29, 2011 - 03:30 pm, by:  Glen Muller (Doom_and_gloom) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

When I built my exhaust I fired up the car with everything south of the resonator removed, and it sounded the same as stock except a lot louder. After I'd removed the resonator and Y-pipe, and I only had the stock manifolds and cats left, it sounded like a NASCAR.

When I get my next exhaust done (I built that other sucker as a test run), I'm tempted to leave each side independent. I think having that beefy note would be awesome... especially if the exhaust will be fabricated from one piece of stainless pipe on each side. Perfect flow and an evil note!

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