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  Soarer Central * Mechanical - V8 * V8 after market exhaust * Archive through July 20, 2010 Previous Previous    Next Next  

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Guy Robinson
Newbie
SA
V8

Posts: 5
Reg: 01-2010

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 Tuesday, March 16, 2010 - 10:34 pm, by:  Guy Robinson (Guy) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Hi everyone. I am very new to this site and have had a Soarer for a few months now (awesome car!)

I know this topic has been covered many times but I am looking to change catback exhaust similar to Peter N and what others have written about. Not sure if to include small hot dogs to cut out drone and then to rear mufflers.

The exhaust place is offering supercat mufflers which I know nothing about. The forums I have read talk more about Lukey ultraflows.

I suppose I can always put the hot dogs in if too noisy or droney. Appreciate any help/suggestions
Ali Saeed
Goo Roo
WA
UZZ31

Posts: 1955
Reg: 09-2007

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 Tuesday, March 16, 2010 - 10:47 pm, by:  Ali Saeed (Ali) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Peter N, from memory, runs Rush extractors into 2 highflow cats, then 2.5 inch all the way to lukeys(i think). no y or x pipe. thats a pretty loud system..so hotdogs might be on the cards
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 11463
Reg: 11-2004

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 Wednesday, March 17, 2010 - 01:36 am, by:  Peter Nitschke (Pen) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
No extractors or X pipe. It would be barely legal from my own SPL tests.
Guy Robinson
Tinkerer
SA
V8

Posts: 6
Reg: 01-2010

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 Wednesday, March 17, 2010 - 12:42 pm, by:  Guy Robinson (Guy) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Thanks for your help everyone. I did manage to get in contact with Traff here in SA who I met last week when I heard his car in a carpark but I wasn't exactly sure what he had done.

He has since clarified and I am booked into the same exhaust place so all good.
Brenton Trafford
Goo Roo
SA
V8 Limited - UZZ31

Posts: 1082
Reg: 08-2005

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 Wednesday, March 17, 2010 - 08:54 pm, by:  Brenton Trafford (Traff) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
He stalked me. Chased me across the Parade (on foot!) and confronted me in the car park! He wouldn't even let the poor old lady parked next to me reverse out of her parking space. FANATIC!

LOL
James Buchan
TryHard
Vic
UZZ31 V8

Posts: 236
Reg: 10-2008

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 Wednesday, March 17, 2010 - 09:40 pm, by:  James Buchan (Jrbuch) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Yeah I've got an exhaust. Go 2.5inch if you plan on putting headers on it. I've got Rush headers into a 2.25inch exhaust, and has restricted the system somewhat.

Really if you plan on putting headers on, get the whole system done at the same time. Anyway I've got Rush headers, into 2 highflow cats, an x pipe, 2x hotdogs and 2 straight through mufflers.
I'll upgrade this system one day to 2.5inch.
Ali Saeed
Goo Roo
WA
UZZ31

Posts: 1961
Reg: 09-2007

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 Thursday, March 18, 2010 - 01:31 am, by:  Ali Saeed (Ali) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
is it possible to like knock all the sound deading out of a stock muffler?
Grant Thomson
Tinkerer
WA
UZZ31 V8

Posts: 10
Reg: 02-2010

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 Thursday, March 18, 2010 - 02:30 am, by:  Grant Thomson (Gt1uz) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I dont know about knocking out the sound deadening Ali but I have seen someone take off a stock muffler, cut out a square hole on the top (so nobody sees once its back on the car), take a blowtorch to some of the innards of the muffler then weld it up at put it back on.
Is highly illegal but does the job for some people.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 11464
Reg: 11-2004

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 Thursday, March 18, 2010 - 09:49 am, by:  Peter Nitschke (Pen) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Just remove the front and middle mufflers and leave the rears. Simple job for a bit more noise.
Damian Ware
Goo Roo
Victoria
UZZ32

Posts: 1445
Reg: 10-2005

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 Thursday, March 18, 2010 - 11:19 am, by:  Damian Ware (Frozenpod) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Grant Thomson wrote on Thursday, March 18, 2010 - 02:30 am:

I dont know about knocking out the sound deadening Ali but I have seen someone take off a stock muffler, cut out a square hole on the top (so nobody sees once its back on the car), take a blowtorch to some of the innards of the muffler then weld it up at put it back on.
Is highly illegal but does the job for some people.



Why is this highly illegal.

You don't have to have any mufflers at all, you can modify them or replace them with aftermarket ones. The only requriment is that the noise level is below a certain level at a certain RPM.
Christian Somerville
TryHard
South Australia
UZZ31 V8 LTD

Posts: 386
Reg: 03-2009

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 Thursday, March 18, 2010 - 04:22 pm, by:  Christian Somerville (Csomers) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
What Peter said
Lew Radbourn
Goo Roo
Queensland / Goodna
jzs147 93 TT / uzz30 93'/

Posts: 3137
Reg: 07-2005

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 Thursday, March 18, 2010 - 05:54 pm, by:  Lew Radbourn (Marlew) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
What Peter said above will do it for the sound and slightly more power (ever so slightly)
Before you start with the exhaust sit back and think about what future mods you are going to do
Eg; forced induction ETC.
then get you exhaust done to suit that
other wise you will be doing it again later like James has said above.
When you mod the car try to do it once ...so ask a heap of questions before starting.
N/A motor twin 2" free flowing is heaps big enough
to much bigger and you actually loose power to the top end of the rev range
m90 s/c a 2 1/4"
larger s/c 2 1/2"
these are all twin systems as well.
Glen Muller
DieHard
Victoria
Soarer - UZZ31 V8

Posts: 742
Reg: 12-2007

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 Friday, March 19, 2010 - 09:32 am, by:  Glen Muller (Doom_and_gloom) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I have a pair of Lukeys hanging off mine. It's only been replaced from the centre flange back, so those middle muffs are gone. In my opinion it sounds real beasty but still pretty quiet. The half-system came off the blue 92 UZZ31 Nathan Cryer was wrecking and I think I paid about $120 for it - so I'm stoked. Had to cut it into three pieces to fit it in the Soarer's boot, so there was a good opportunity to christen my old man's new little gasless MIG.

I love the over run when you come off the freeway and knock it back into second...
Mike Beck
Goo Roo
New Zealand
325i Coupe

Posts: 4393
Reg: 11-2005

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 Friday, March 19, 2010 - 04:02 pm, by:  Mike Beck (Gold_40gt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Glen Muller wrote on Friday, March 19, 2010 - 09:32 am:

I love the over run when you come off the freeway and knock it back into second...



:-)
Guy Robinson
Tinkerer
SA
V8

Posts: 7
Reg: 01-2010

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 Friday, March 19, 2010 - 05:08 pm, by:  Guy Robinson (Guy) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Yeah Traff is right. I did chase him across the road because I had not heard a V8 with a decent exhaust so that was my chance. Despite realising how unfit I was by chasing him on foot, he gave me some good advice and I did get the exhaust fitted yesterday. I am very impressed with the note as well as the service from Peter at Exhaust Plus at Stepney.

Thanks everyone for their input and advice
Boris Siljanoski
DieHard
Western Australia
Soarer GZ20 TT

Posts: 609
Reg: 11-2007

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 Friday, March 19, 2010 - 07:42 pm, by:  Boris Siljanoski (Z2tt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Lew isn't 2" pretty much close to the stock size?
James Buchan
TryHard
Vic
UZZ31 V8

Posts: 239
Reg: 10-2008

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 Friday, March 19, 2010 - 08:32 pm, by:  James Buchan (Jrbuch) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
So what size did you end up getting? is it a catback?
Lew Radbourn
Goo Roo
Queensland / Goodna
jzs147 93 TT / uzz30 93'/

Posts: 3139
Reg: 07-2005

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 Saturday, March 20, 2010 - 05:27 pm, by:  Lew Radbourn (Marlew) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Boris ;
Yer mate it is very close to 2"
But you have to remember one important thing an engine needs a certain amount of back pressure
You will notice this when you go from a stock system to a twin 2 1/2" system the 2 1/2" system moves the power curve higher in the rev range.
So doing this it is a little more slower off the line.
Boris Siljanoski
DieHard
Western Australia
Soarer GZ20 TT

Posts: 616
Reg: 11-2007

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 Saturday, March 20, 2010 - 06:47 pm, by:  Boris Siljanoski (Z2tt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Well actually exhaust gas velocity is what is required, backpressure is unwanted, but it's what you get when you try to maintain higher exhaust gas velocity (with a smaller pipe).

Haven't done any experimentation with the 1uz engines, but I've seen some cases on small N/A engines (2.0L Honda K20), where going from stock 2" or so to 2.5" increased power everywhere, then increasing it to 3" gained power everywhere too, was surprised but I guess every engine is different.

I think twin 2.25" is PLENTY for a N/A 1uz, the more important thing is smooth consistent bends to keep the flow stable.
Lew Radbourn
Goo Roo
Queensland / Goodna
jzs147 93 TT / uzz30 93'/

Posts: 3145
Reg: 07-2005

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 Saturday, March 20, 2010 - 06:58 pm, by:  Lew Radbourn (Marlew) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Boris;
what you have said above is exactly what has to be done.
Velocity and back pressure is the jugging act that we all try to get correct.
and what works for one engine doesn't always work for the next.
like every exhaust i make it is the flow ability that is the most important to me.
I see so many exhausts that have a 90 deg bend in them when thay can get away with 2 x 45deg bends slightly seperated.
to me a 90 deg bend is like smashing ya head against a wall
and the 2 45's are like grazing ya cheek on the wall.hahahhahah
Boris Siljanoski
DieHard
Western Australia
Soarer GZ20 TT

Posts: 617
Reg: 11-2007

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 Saturday, March 20, 2010 - 07:08 pm, by:  Boris Siljanoski (Z2tt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
And a straight pipe with no bends is like flying through the wall like it's not even there ;)

Lew Radbourn
Goo Roo
Queensland / Goodna
jzs147 93 TT / uzz30 93'/

Posts: 3146
Reg: 07-2005

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 Sunday, March 21, 2010 - 10:03 am, by:  Lew Radbourn (Marlew) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
hahahahahha yer
Murray Lund
TryHard
NSW
V8

Posts: 304
Reg: 07-2005

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 Tuesday, July 20, 2010 - 07:32 pm, by:  Murray Lund (Murray) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I have gathered the components for my new exhaust system - Rush ceramic coated standard headers, pair of 2 1/2" s/s hi flo cats (100 cell), s/s Magnaflow 2 1/2" X Pipe, and Lukey 2 1/2" s/s double offset Ultraflows. I am installing headers myself in early August when the Hobbies Workshop opens at work (it has a hoist) and will then get the components connected locally with 2 1/2" mild steel pipe. Press bend on minor bends and mandrels on the couple of bigger curves.
Dynoed last Friday pre-changes at 123.8kw/rw. Will be interested to see what the new system puts out.
Mike Beck
Goo Roo
New Zealand
E36 Coupe

Posts: 4838
Reg: 11-2005

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 Tuesday, July 20, 2010 - 08:47 pm, by:  Mike Beck (Gold_40gt) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Murray Lund wrote on Tuesday, July 20, 2010 - 07:32 pm:

2 1/2" mild steel pipe.



Get the aluminium coated Mild steel stuff if you can

Slightly more expensive than Mild steel but the best as it will take way longer to rust, and a LONG time if you also paint it properly.

Mild steel will go rusty with in the first month and start getting holes in it after a couple of years.
Steven Anderson
TryHard
NSW
UZZ31 Manual

Posts: 489
Reg: 05-2006

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 Tuesday, July 20, 2010 - 10:01 pm, by:  Steven Anderson (Cusscuss) Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Maybe in NZ, but mild steel takes a lot longer than a couple of years to get holes in it if you paint the outside.

There is very little water on the inside for it to rust, lots of heat and also usually a bit of oil/petrol coming out the exhaust.

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