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  Soarer Central * Mechanical - V8 * Diff-back Exhaust, good option? * Archive through May 10, 2012 Previous Previous    Next Next  

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Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 27
Reg: 06-2009

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Monday, May 07, 2012 - 07:19 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hey guys,

My exhaust budget is quite low so whole system is not an option, the exhaust shop i went to today said they would do a new exhaust from the diff back, that is: From the rear of the central muffler.

2.25" press bent from there, into 2.25 straight-thru Coby brand mufflers at rears (cut out the ones in-between), stock tips welded back on.

Do you think this will sound good and have any performance benefit?

Quoted my $600 all up.
Dan McColl
Goo Roo
Victoria (The Nazi State)
Pretty Red Thing and The Black Rattler

Posts: 3463
Reg: 07-2005

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Monday, May 07, 2012 - 07:43 pm, by:  Dan McColl (Hoon) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Didn't read it properly the first time. There should be a slight sound and performance gain with that. For that money I'd hope for stainless steel.

You should be able to get a full cat back, press bent 2.25" mild steel system for around that money.
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 28
Reg: 06-2009

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Monday, May 07, 2012 - 07:47 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I'm in New Zealand, perhaps prices are a bit higher here. After doing a bit of research apparently it's that central resonator that makes the difference, could i replace that with a hot-dog?

We don't require cats in NZ
Jay Asghari
TryHard
Victoria
'94 UZZ31 GTL, '94 TT, '96 UZZ32

Posts: 136
Reg: 01-2010

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Monday, May 07, 2012 - 07:59 pm, by:  Jay Asghari (8pack) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Pretty much what Dan said, I got quoted for $660 around 2 years ago for a stainless, mandrel bent exhaust from the extractors back. Call it a great quote but I wouldn't go too much higher than that.

Shop around mate, you could get a cat back stainless system around the 600/700 $ mark. You will need two 'hot dogs' as you'd go twin system and two decent mufflers after that.

Let us know how you go.
Dan McColl
Goo Roo
Victoria (The Nazi State)
Pretty Red Thing and The Black Rattler

Posts: 3466
Reg: 07-2005

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Monday, May 07, 2012 - 08:27 pm, by:  Dan McColl (Hoon) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I think that's pretty cheap, Jay. I'd expect over 1k for a stainless, mandrel bent system.

The central resonator is a 'hot dog'.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 12331
Reg: 11-2004

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Monday, May 07, 2012 - 09:14 pm, by:  Peter Nitschke (Pen) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Go from the cats back, remove the central and next set of mufflers and refit the original rears.

You are only paying for some pipe, fittings and labour, so should be very cost effective.
Damian Ware
Goo Roo
Victoria
UZZ32

Posts: 2123
Reg: 10-2005

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Monday, May 07, 2012 - 09:45 pm, by:  Damian Ware (Frozenpod) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Factory rear mufflers are pretty good flow wise, and the centre reasonator (hot dog) is fantastic.

If you are going for maximum bang for buck, remove the two middle mufflers and replace with pipe.
James Buchan
Goo Roo
Vic
V8

Posts: 1348
Reg: 10-2008

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Monday, May 07, 2012 - 09:50 pm, by:  James Buchan (Jrbuch) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Paid $550 for a catback two years ago, 2.25inch, into x pipe, 2x hotdogs and straight through mufflers. At this price, it would have been mild steel and not mandrel bent
James Johnson
DieHard
Auckland
95 UZZ31

Posts: 535
Reg: 03-2009

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Tuesday, May 08, 2012 - 05:10 am, by:  James Johnson (Jimbo) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Rory, I am up in Auckland. I had a full custom exhaust made up using 2.5 inch and mandrel bends that I sourced myself with flanges and mufflers, paid about $2-300 for that and got my mate to weld it up through his work and cost me just over $500 in labour and that was at the standard price so it was not even mates rates. This exhaust was from extractors back and used the stock tips. Hint: if you need to buy flanges go to pit stop and buy from them, I have found they are the cheapest.
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 29
Reg: 06-2009

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Tuesday, May 08, 2012 - 06:57 am, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks for the replies guys, that's a good price James; i think Hamilton may be a bit behind in prices because i have shopped around and it's really the only exhaust shop i trust.

According to PlanetSoarer, the rear and central mufflers restrict the most flow, so with everyone's suggestions i'm getting quite confused haha...

I'm looking for a really throaty sound with a slight performance bump
Steven Anderson
DieHard
NSW
JZA80

Posts: 656
Reg: 05-2006

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Tuesday, May 08, 2012 - 11:19 am, by:  Steven Anderson (Cusscuss) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

If the rest of the exhaust is stock just ditch the rear mufflers all together, it gives about the right amount of noise for a sports exhaust and is either free if you leave the mufflers off or very cheap if you get some pipe welded up.

Get under the car, take em off and see what you think, wont hurt to try.
Ali Saeed
Goo Roo
WA
RSP GT-T

Posts: 3888
Reg: 09-2007

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Tuesday, May 08, 2012 - 11:58 am, by:  Ali Saeed (Ali) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

This is what it sounds like without rear mufflers:
http://www.youtube.com/watch?v=UNhOlqOy7Rs
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 30
Reg: 06-2009

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Tuesday, May 08, 2012 - 02:06 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

That actually sounds pretty good but i'm hoping to gain some performance too, i notice the exhaust piping goes to 1.5' just under the diff - so restrictive! That's why im wanting to replace that pipe, get rid of middle mufflers, and replace rears with straight-throughs. $600 is a little rough though.
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 31
Reg: 06-2009

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Tuesday, May 08, 2012 - 02:07 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Unless someone can sway me otherwise, i'll go through with it on Thursday, and let everyone know the results.
Jay Asghari
TryHard
Victoria
'94 UZZ31 GTL, '94 TT, '96 UZZ32

Posts: 138
Reg: 01-2010

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Tuesday, May 08, 2012 - 08:15 pm, by:  Jay Asghari (8pack) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Above price quoted was for two mufflers and x pipe I supplied. Although, yes I presumed it was for stainless may have been for mild though.

Hot dogs are also known as resonators. My initial suggestion was to get rid of the mid pipe and install two resonators instead.

Good luck with it all, Rory.
Damian Ware
Goo Roo
Victoria
UZZ32

Posts: 2124
Reg: 10-2005

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Wednesday, May 09, 2012 - 11:45 am, by:  Damian Ware (Frozenpod) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Rory Braatvedt wrote on Tuesday, May 08, 2012 - 02:06 pm:

i notice the exhaust piping goes to 1.5' just under the diff




Actually the pipe size is the same, but in this area it is no longer perfectly round.
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 32
Reg: 06-2009

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Wednesday, May 09, 2012 - 04:33 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I took that from:

http://planetsoarer.com/V8exhaustmeasurements/Soarer_v8_exhaust_measurements.htm

It says 1.5' to clear rear suspension, not the diff as i said.

Getting exhaust done tomorrow, will let you all know the results this time tomorrow night
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5493
Reg: 11-2005

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Wednesday, May 09, 2012 - 06:25 pm, by:  Mike Beck (Gold_40gt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

If you want to do the exhaust on a budget, at a bare minimum get rid of the whole stock cat back system.

The worst thing to do is keep the stock Y pipe resonator to Y pipe piece, it ruins the exhaust note completely regardless of what you do after it!

My recommendation

A cat back 2.25", no balancer, H pipe or and X pipe, depending on what style you like... a couple of small resonators or round mufflers in the middle and out the back to a pair of double offset mufflers... magnaflow have some good stainless ones, or Lukey, another good choice... otherwise to save $400-500 there you could use the stock rear mufflers but they will spoil the sound a bit due to the internal restrictions.

Heres how some of my cat back exhausts sounded on the few Soarers I've owned....

This was 2.25 Cat back, no balancers or resonators to a pair of lukey stainless mufflers. All three are the same car.





This was another setup I did, Cat back 2.25, no balancers or resonators (although could have done with some) out to twin Audi RS4 rear mufflers on the back, sounded much deeper and sweeter in person!



And yes the cars went quicker with the exhaust, but you should do headers if you want real gains, but thats another $1200+ on top. :-)
Scott Vim
TryHard
Vic
Soarer (1uz) Chaser (1jz)

Posts: 229
Reg: 12-2010

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Wednesday, May 09, 2012 - 07:16 pm, by:  Scott Vim (1uz1jz) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Rs4 mufflers? Where you find those?
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5497
Reg: 11-2005

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Wednesday, May 09, 2012 - 08:15 pm, by:  Mike Beck (Gold_40gt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I know a guy that runs a European car exhaust shop, best source for cheap high quality exhaust systems!

Most of the stock Euro sports cars have straight through stainless systems that work perfectly if you reuse them in the right way.
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 33
Reg: 06-2009

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Wednesday, May 09, 2012 - 08:35 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I like the sound with the RS4 mufflers! A bit too raspy but nice and aggressive, not a fan of the lazy v8 sound.
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5498
Reg: 11-2005

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Thursday, May 10, 2012 - 09:31 am, by:  Mike Beck (Gold_40gt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Rory Braatvedt wrote on Wednesday, May 09, 2012 - 08:35 pm:

A bit too raspy but nice and aggressive,




Yeah, the lack of resonators did that to it, a good example of how you need each exhaust component to help the other one do its function or else it can't handle the vibrations and produces that 'clacky' rasp.

I was going to put some resonators in that system but I removed the exhaust and sold the car in the end, although I'm doing nearly the same system on my E36 next month so it should sound pretty good!
Damian Ware
Goo Roo
Victoria
UZZ32

Posts: 2125
Reg: 10-2005

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Thursday, May 10, 2012 - 12:36 pm, by:  Damian Ware (Frozenpod) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Rory Braatvedt wrote on Wednesday, May 09, 2012 - 04:33 pm:

I took that from:




I have seen that link before and the pipe is the same area as elsewhere just shape changed. It looks bad at first, just have a closer look.

As to the restriction/pressure loss the rear muffler is clearly the highest but I think that is all 4 not just the last 2.

The final 2 mufflers are not all that restrictive, the 2 middle mufflers are very restrictive though.

Each to there own Mike as plenty of people like that sounds but IMO 2 into 1 is the only way to go.
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 34
Reg: 06-2009

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Thursday, May 10, 2012 - 01:25 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Update #1:

I got the car back today with the 2.25' system from the central resonator back, axed the 2 mid mufflers and replaced rear mufflers with straight-through

Reaction:
Very quiet. Too quiet. Lazy and subtle sound, opens up a bit on full throttle but disappointed, especially for $600. Took it back to exhaust shop and told him to get rid of the central resonator and replace with straight pipe, will update again this evening when i get it back
Rory Braatvedt
Tinkerer
North Island
Soarer v8

Posts: 35
Reg: 06-2009

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Thursday, May 10, 2012 - 02:20 pm, by:  Rory Braatvedt (Fallward) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Update #2:

Got car back again with central resonator removed, hardly any louder! Maybe a couple of db, slightly more droney.

Reaction:
WTF? i was expecting this to cackle now! In terms of performance, car feels about the same to be honest. Barely any performance difference. I'm thinking it's the cats and the Y joints making this Soarer sound average.

Sigh.

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