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(Post Link) post #1 of 27 Old 23-01-12 Thread Starter
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Unsilenced centre

who on here,if anyone is brave enough to be running around with an unsilenced centre section on an aftermarket SS exhaust (decatted if poss)? What are the results and what is it like to live with?
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I have cf2 front manifolds, equal pipes, centre cat and a wizard exhaust. It is Loud and gives lots of pops on the overrun.
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I have cf2 front manifolds, equal pipes, centre cat and a wizard exhaust. It is Loud and gives lots of pops on the overrun.
Is it easy to live with? i.e what does the missus say?
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She has some fluffy ear muffs to wear lol.

People who don't like cars moan because the wizard exhaust means you get a lot of high pitched noise. With a normal backbox it would just be very boomy.

I don't use my car daily but I have found it annoying on long runs
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I took some vids of my GTA if that helps

Supersprint with no centre silencer - sounds loud here, but certainly wasn't intrusive or loud when moving, was just right IMO:

147GTA, Supersprint, Unsilenced - YouTube

The decat, on the other hand - LOUD and sounded crap. Don't do it.

147 GTA with decat - YouTube
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Im working on a silenced center for the 147 GTA, i can imagine it would get to you a bit
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Completely unsilenced on a Gtv V6 here. Rather noisy and a bit much on long trips

Has been known to register 109dB on track days
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Equal length downpipes, straight through unsilenced de-cat, and unsilenced wizard cat back. I've got used to it and it has settled down, sounds good full throttle, but low rev light throttle bit of metallic rattle, sounded much nicer with standard centre cats in place.
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Panic - buy unsilenced pipe, fit it, see if u like noise or not, if u dont, put the silencer back on and sell pipe on ebay, if u like it, keep it. Simples.
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Quote:
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Panic - buy unsilenced pipe, fit it, see if u like noise or not, if u dont, put the silencer back on and sell pipe on ebay, if u like it, keep it. Simples.
yeah think that is what I am gonna do. nothing ventured and all that.............
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Quote:
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I took some vids of my GTA if that helps

Supersprint with no centre silencer - sounds loud here, but certainly wasn't intrusive or loud when moving, was just right IMO:

147GTA, Supersprint, Unsilenced - YouTube

The decat, on the other hand - LOUD and sounded crap. Don't do it.

147 GTA with decat - YouTube
mine sounds like the 1st vid now. (2nd cat out and full scorpion fitted) gives a great burble on tick over,
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Not unsilenced centre but close.

CF2-decat-silenced-remus.

Alfa 147 GTA CF2 Remus - YouTube
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Quote:
Originally Posted by AYAT View Post
Equal length downpipes, straight through unsilenced de-cat, and unsilenced wizard cat back. I've got used to it and it has settled down, sounds good full throttle, but low rev light throttle bit of metallic rattle, sounded much nicer with standard centre cats in place.
Sounds very similar to mine. I think it needs a bit more mass to it to take the edge off.
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I found that with my 2.5 V6 and the wizard exhaust that with a decat it didnt sound good. I then had a sport cat which sounded fine but a bit loud and now I'm using the standard centre cat. So my car is basically just the centre cat and the wizard cat back exhaust.................and I love the sound

Alfa 156 V6 with Wizard exhaust - YouTube

I think this was with the Sport cat fitted, might be a bit loud for some but with a centre silencer / or cat then its fine
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I'm running a Scorpion GTA decat, unsilenced centre pipe (from 2.4 JTD) and a Supersprint backbox on my 3.0 156 and it isn't too intrusive at all. The Supersprint is quite a quiet box anyway though.
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I was running with standard front pipes and cats (2.5 V6 CF3 version), Ragazzon straight through centre pipe and Ragazzon silenced rear with twin round tailpipes. Pleased with the sound at cruising speeds, sounded fantastic on acceleration, popped on the overrun . However, I found it to be a bit intrusive around town so refitted the standard silenced centre...........it didn't make any difference whatsoever so must be a characteristic of the rear silencer. Unfortunately, I've since found that the front pipe from the front cylinder bank has a cracked weld joint so won't be refitting the centre pipe until I get that repaired. I am considering ordering the Ragazzon silenced centre which may more compliment the rear, assuming Gazella can deliver it in a reasonable time frame that is
Sports exhausts are horses for courses really.
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(Post Link) post #18 of 27 Old 16-02-12 Thread Starter
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Now fitted. Not a huge difference but deffo a deeper warble on tickover. Actually sounds quiter at 3000rpm in 6th.
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vids please!
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will get around to it. even have a plan to film 1 very close up while at full chat on the open road.. If i can get the camera to stay in place that is....
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Static noise test now with OE air filter fitted..........

Gt. Unsilenced centre section for scorpion exhaust - YouTube
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Quote:
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Static noise test now with OE air filter fitted..........

Gt. Unsilenced centre section for scorpion exhaust - YouTube
sounds lethal that mate
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just shot moving video. uploading to you tube as we speak....
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uploading to you tube as we speak....
that'll take a few weeks then
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