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 Post subject: Extractors And Exhaust
PostPosted: Mon Feb 04, 2008 6:08 pm 
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Joined: Sun Dec 16, 2007 9:22 am
Posts: 89
Location: North Queensland ( cairns )
Got the standard factory set up now on the car , Was thinking of upgrading it , want to keep it legal thoe but more sound would be nice as long as it doesnt take away performance , IDEAS. :)


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PostPosted: Tue Feb 05, 2008 12:24 pm 
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Joined: Thu Mar 31, 2005 7:17 pm
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Location: Back in the UK
A few people on the UK SISOC forum have done things on the exhaust side but no idea how effective it's been. Suggest you look around there. It's not something I've taken any interest in.


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PostPosted: Tue Feb 05, 2008 3:50 pm 
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Location: North Queensland ( cairns )
Yeah , just thought some one might of played around with this area , I rarely listern to any thing that overseas people have to say diffrent country diffrent laws. just thought there may be a gain to make there but I rather some one else be the guinea pig, Trying to get advice from exhaust specialist is hard as there only into things that sound good ( thats fine ) but perform better is another thing. :?


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PostPosted: Fri Feb 08, 2008 11:35 am 
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Joined: Sun Mar 21, 2004 4:53 pm
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Location: Melbourne
I've got a complete custom exhaust with extractors - but it's a tad loud.

It makes the engine a little more responsive, but I don't think the factory exhaust restricted the engine too much to begin with. You'd probably need to free the flow in both the intake and the exhaust to feel the difference. A bottleneck in one negates the free-flow of the other.


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PostPosted: Fri Feb 08, 2008 2:08 pm 
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Joined: Sun Dec 16, 2007 9:22 am
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Location: North Queensland ( cairns )
Intresting , need to do some more investigation before I commit to changing anything. seems I might have to be the guinea pig after all. :lol:


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PostPosted: Sun Feb 10, 2008 7:41 pm 
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Location: Melbourne
Not sure if you're heard what it sounds like... Here's a vid I compiled from the last cruise if you haven't seen it already:
http://www.youtube.com/watch?v=o3RYy4qhRw8


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PostPosted: Mon Feb 11, 2008 8:12 am 
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Joined: Fri Sep 09, 2005 4:41 pm
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Location: Melbourne
Russ trust me your car is LOUD!!!
I'll be changing the mufflers on my car soon but keeping the std factory headers & exhaust pipes

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PostPosted: Mon Feb 11, 2008 3:54 pm 
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Joined: Sun Dec 16, 2007 9:22 am
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Location: North Queensland ( cairns )
Nice sound but proberly a little loud for my taste I like to hear the exhaust for shore but not belling thru the car that mutch , It seems the car was popping a bit thru the exhaust when you where backing off , not to sure thats good for back pressure for the valves. Dont want to do damage just to sound better. :lol:


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 Post subject: Re: Extractors And Exhaust
PostPosted: Tue Jul 01, 2008 3:38 am 
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Joined: Thu May 24, 2007 1:56 am
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Location: Melbourne
I have Suzuki Sport SPX Muffler, it is just about right for the sound. However when the rev up to 3500/RPM the exhaust sound will get louder.


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 Post subject: Re: Extractors And Exhaust
PostPosted: Tue Jul 01, 2008 1:02 pm 
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Location: Melbourne
MAD_IS wrote:
I have Suzuki Sport SPX Muffler, it is just about right for the sound. However when the rev up to 3500/RPM the exhaust sound will get louder.

That's how you want it. If you don't wanna make noise, keep it below 3500RPM. In the IS you only need higher revs than that on really steep hills.


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 Post subject: Re: Extractors And Exhaust
PostPosted: Tue Jul 01, 2008 1:15 pm 
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Joined: Fri Sep 09, 2005 4:41 pm
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Location: Melbourne
I think the std factory exhaust makes a nice sound anyway
I thought about changing just the mufflers but changed my mind
The factory headers aren't a bad design either
Getting rid of the intake resonator has also added a nice induction note as well

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