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Author Topic: Exhaust bore?  (Read 2157 times)

Offline Alexiskayak_7

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Exhaust bore?
« on: May 17, 2009, 05:04:10 pm »
Having an almost standard polo it's time to change the exhaust (cat-back) because both silencers in the boxes are broken so they start to make noise...
I'll definatelly use inox pipes and boxes with inox welding...
Also, i'm going to make 2 boxes to keep the noise down...
My question is what's the most efficient bore that the exhaust must have (from midbox to backbox)

Thank you for your time, Alex...
 
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Offline djtez

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Re: Exhaust bore?
« Reply #1 on: May 17, 2009, 07:20:20 pm »
i use 63mm bore but thats just purely for performance reasons.. and is very loud with no box's at all

i used a 50mm ( 2" ) system with a standard middle box and was a great system with low noise until you hit the full throttle. and has good strong tone to it with lots of torque and mid range pull

tez
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Offline hayesey

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Re: Exhaust bore?
« Reply #2 on: May 17, 2009, 07:29:27 pm »
you've got no silencers in the exhaust at all?!  That must sound awful
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Offline djtez

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Re: Exhaust bore?
« Reply #3 on: May 17, 2009, 07:33:08 pm »
it just sounds farty and well .. sounds like it has no boxes haha

i have a PSD rear silencer there also buts away being re polished..

doesn't sound too much different from it being on or off? just a little more controlled
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Offline Alexiskayak_7

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Re: Exhaust bore?
« Reply #4 on: May 19, 2009, 01:08:12 pm »
Other advice?
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Offline scotsjohn

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Re: Exhaust bore?
« Reply #5 on: May 19, 2009, 05:40:28 pm »
My G came with a 65mm Speedtech system which is probably only a benefit if you've got a lot of horses or a turbo.Strangely enough, it exited through a 50mm tailpipe. Basically it was crap.
I've now got a 50mm powerflow system which is shiney enough to impress Hedgehogs and more importantly, it sounds AOK. Pleasantly muted but snarls when you put you'r foot down. Recommend 50mm.
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