Centre Muffler Removal

[Kimberley Scott]

We all know that the major restriction in a stock Zorst is the cat, however taking out the centre muffler will to some extent free up flow. It has to or you would not get ,ore sound.

How this effects tune and ecu is way beyond me, but why would I be getting some much feedback telling me not to do it?

Scotty

PS Shock that replacement bit looks great, and I would dearly love to do the same. Are you able to tell us wher that company is?

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I had a typhoon cold air and current zorst I got now and filter and had 192rwkw. boost was straight as they come also....some people say u can overboost with a zorst like mine but I had not one issue. (AUTO BTW)

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Fair enough, do you have before and after power figuers, as this will give a good indication as to what effect the exhaust mods had, apart from the obvious fully sic sound.

Scotty

[urslow]

We all know that the major restriction in a stock Zorst is the cat, however taking out the centre muffler will to some extent free up flow. It has to or you would not get ,ore sound.

How this effects tune and ecu is way beyond me, but why would I be getting some much feedback telling me not to do it?

Scotty

PS Shock that replacement bit looks great, and I would dearly love to do the same. Are you able to tell us wher that company is?

←

I had a typhoon cold air and current zorst I got now and filter and had 192rwkw. boost was straight as they come also....some people say u can overboost with a zorst like mine but I had not one issue. (AUTO BTW)

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Fair enough, do you have before and after power figuers, as this will give a good indication as to what effect the exhaust mods had, apart from the obvious fully sic sound.

Scotty

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sorry man no I dont..but bugger all I reckon.

[JimmyXR6T04]

I have a magazine at home that went through the process of doing up an XR6T. Changing parts like cat, mufflers etc without tunes and checking dyno results. It was really interesting. I'll check it out tonight/tomorrow and post up the results of what they found when changing certain parts.

[Kimberley Scott]

PS Shock that replacement bit looks great, and I would dearly love to do the same. Are you able to tell us wher that company is?

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If your asking me... its from exotic exhausts at sumner park... cost $275 if I remeber correctly... madrel bent with flanges

If you want to do more then the centre muff, may as well get a whole exhaust

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Sorry mate I was asking you, no insult intended.

Scotty

[turbomuz]

Fair enough, do you have before and after power figuers, as this will give a good indication as to what  effect the exhaust mods had, apart from the obvious fully sic sound.

Scotty

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I had my car dynoed before and after fitting of hotdogs and I gained power. A massive 1.8kW!!!

I wasn't expecting power gains as I believe the centre muffler is almost straight through like the rear muffler. The hotdogs are only louder because they have less volume to absorb sound.

Muz

[cobrav8]

Totally agree with Muz. Older mufflers used to restrict airflow by going through small holes etc. More modern mufflers restrict noise based on affecting the shockwaves of noise by turning the flow past a baffle - basically not reducing flow much at all.

On BMW race cars they just pass the exhaust through a box that is roughly 1.5 times the engine size - no restriction at all, but it still cuts the sound. In fact, a good performing muffler could flow air better than a hot-dog I would have thought.

Saying all that - I am still considering the hot dog route as I think the cars need a little more noise.

[Bain]

Mika.

Give Daalder Exhausts in Box Hill a call.

They did my twin hotdogs and Stainless steel tips.

I have a soundclip of in the car and outside of the car aswell if you want that.

Edited 19/10/06 04:56 AM by Bain

[MiKa]

Yeah hook up the soundclips.... Box hill a lil too far from me I think maybe try the one near me.. How much was it just for the doggs??

Last time I went there for a cat for my VS they seemed to be a bit pricey

[Paradoxx]

For a relatively cheap mod I think it is worth getting done. I have been quoted around the $400 mark including 3" tips... it makes a nice noise but I doubt it would change the power much if at all. It would help out to change the cat and get an edit!

[JimmyXR6T04]

heres a link to my thread. My exhaust consists of a hi-flow cat and removed centre muffler. Sounds much better in the flesh, the vid doesn't do it justice at all.

edit: doh! forgot the link

http://www.fordxr6turbo.com/forum/index.php?showtopic=29062

Edited 19/10/06 07:38 AM by JimmyXR6T04