recommend me an exhaust

Fiat Coupe Forum
- Founded by Kayjey & James Northam
- Funded by the Club for the benefit of all owners

Fiat Coupe Club UK

Fiat Coupe Forum

» Announced
Posting images

» Related sites
Main club site
fiatcoupe.net

» External data
owners listed

Top Posters(All Time)

barnacle 33,566

stan 32,122

Theresa 23,303

PeteP 21,521

bockers 21,071

pinin_prestatyn 19,937

JimO 17,917

Nigel 17,367

Countrycruising 17,227

Edinburgh 16,825

Print Thread

recommend me an exhaust #695228 21/10/2008 15:55 21/10/2008 15:55
Joined: Dec 2005 Posts: 17,367 Staffordshire Nigel OP Forum veteran
Nigel OP Forum veteran Joined: Dec 2005 Posts: 17,367 Staffordshire	I think my car may have outgrown my SuperSprint exhaust. Some poor dyno results suggest that it may be too restrictive for 400bhp, so I'm considering 3" (or more?) all the way. However, as you all know, this car does LOTS of miles and needs to be fairly civilised at low boost. I need it NOT to be boomy at motorway speeds, although I don't mind a bit of noise - adds the the character. It can be as loud as it needs to be after 5,000rpm or above 1.4 bar. So - any suggestions? If anyone has a 3" pipe lying around that they would be prepared to lend me, I'd love to try it first to see if I can live with it. I love the sound of the SuperSprint - quiet and unobtrusive at idle, growly at modest revs, nice and loud at mid-range and totally beserk at high boost.

Re: recommend me an exhaust [Re: Nigel] #695244 21/10/2008 16:10 21/10/2008 16:10
S suba Unregistered
suba Unregistered S	Nigel - you really dont want to go more than 3 inch with a few silencers for the miles you do in the car. My 3 inch Longlife is boomy between 2-3k - particularly on a motorway, and would probably be more so on your car until it's on boost. Sounds nice at full chat though! If you go for anything smaller than 3 inches then IMO you are going to have the same issues that you have with the 2.25 supersprint mid and rear section. You are welcome to go for a run in my car anytime to see if you can live with the noise. $\:\)$

Re: recommend me an exhaust [Re: ] #695257 21/10/2008 16:21 21/10/2008 16:21
M MattW Unregistered
MattW Unregistered M	Just posted in your other thread... $\:P$ In my experiences of fiddling around with silencers and cat converters I found that boomy on the motorway and loud with the windows down are very different, and you can have one without the other and vice versa. If I run with no cat and 2 silencers it's a bit boomy on the motorway, but not too loud out the back. If I run with no cat and 1 silencer at the rear and a decat pipe it's quite loud out the back with the windows down (but a totally stunning soundtrack) and boomy on the motorway but ONLY between 2750-3250rpm. At any other revs it is not boomy at all. With the windows closed it's not too loud for me at all. If I run with the cat on and 1 silencer there is no boomyness at all, really nice journey on the motorway, sounds nice out the back but it is fairly muted, no growl, no pops and bangs, just a nice tone. My exhaust is 2.75" turbo back Blueflame one. The silencers I was using were the standard blueflame one at the back and a big heavy one I borrowed off someone which just happened to fit in my decat section. Last edited by MattW; 21/10/2008 16:37. Reason: added bits

Re: recommend me an exhaust [Re: ] #695260 21/10/2008 16:28 21/10/2008 16:28
Joined: Dec 2005 Posts: 3,158 Near Reading JohnS I need some sleep
JohnS I need some sleep Joined: Dec 2005 Posts: 3,158 Near Reading	I have a removable silencer in the cat section which I think is the way to go so that you can have high performance when you want it. It is v-banded 3" so is removable with about 5-10 mins effort. I actually have three silencers. 2x lightweight silencers that are fairly minimal silencers (i.e. barely any restriction) but are the type that can be repacked, and a normal silencer at the back. All my power was actually made with all three silencers in place bizarrely. Never tried with my straight pipe or my cat

Re: recommend me an exhaust [Re: JohnS] #695264 21/10/2008 16:34 21/10/2008 16:34
Joined: Dec 2005 Posts: 10,728 N.E Scotland mattB Club member 6
mattB Club member 6 I AM a Coop Joined: Dec 2005 Posts: 10,728 N.E Scotland	V-banded exhaust sections, I like that idea. Death-rattle-tastic

Re: recommend me an exhaust [Re: mattB] #695276 21/10/2008 16:46 21/10/2008 16:46
C Cheesy Beano Unregistered
Cheesy Beano Unregistered C	Make your own like me. Used and H&S 3" downpipe then made the rest up. I use a 600mm silencer in the middle of the car and one at the back. No cat mind but you could add one and reduce the middle silencer. Marco

Re: recommend me an exhaust [Re: ] #695318 21/10/2008 18:02 21/10/2008 18:02
M MiniPit Unregistered
MiniPit Unregistered M	Nigel, what's the current diameter of your exhaust?

Re: recommend me an exhaust [Re: ] #695332 21/10/2008 18:21 21/10/2008 18:21
Joined: Dec 2005 Posts: 2,194 Göteborg, Sweden Freddan72 Competition Level
Freddan72 Competition Level Joined: Dec 2005 Posts: 2,194 Göteborg, Sweden	Originally Posted By: MattW Just posted in your other thread... $\:P$ In my experiences of fiddling around with silencers and cat converters I found that boomy on the motorway and loud with the windows down are very different, and you can have one without the other and vice versa. If I run with no cat and 2 silencers it's a bit boomy on the motorway, but not too loud out the back. If I run with no cat and 1 silencer at the rear and a decat pipe it's quite loud out the back with the windows down (but a totally stunning soundtrack) and boomy on the motorway but ONLY between 2750-3250rpm. At any other revs it is not boomy at all. With the windows closed it's not too loud for me at all. If I run with the cat on and 1 silencer there is no boomyness at all, really nice journey on the motorway, sounds nice out the back but it is fairly muted, no growl, no pops and bangs, just a nice tone. My exhaust is 2.75" turbo back Blueflame one. The silencers I was using were the standard blueflame one at the back and a big heavy one I borrowed off someone which just happened to fit in my decat section. What kind of catalysator do you use? 100 cells? Coupé Fiat 20V Turbo Plus 1999, T19 Mitsubishi turbo https://youtu.be/O9qrLj3Ap00 Now FCP Stage3!

Re: recommend me an exhaust [Re: Freddan72] #695336 21/10/2008 18:23 21/10/2008 18:23
M MattW Unregistered
MattW Unregistered M	No, a normal one. I only use it once a year $\:D$

Re: recommend me an exhaust [Re: mattB] #695345 21/10/2008 18:41 21/10/2008 18:41
Joined: Dec 2005 Posts: 3,158 Near Reading JohnS I need some sleep
JohnS I need some sleep Joined: Dec 2005 Posts: 3,158 Near Reading	Originally Posted By: mattB V-banded exhaust sections, I like that idea. Yeah I realised otherwise it was a pig to swap in the cat for MoT etc. Now easy peasy

Re: recommend me an exhaust [Re: ] #695346 21/10/2008 18:41 21/10/2008 18:41
Joined: Dec 2005 Posts: 2,194 Göteborg, Sweden Freddan72 Competition Level
Freddan72 Competition Level Joined: Dec 2005 Posts: 2,194 Göteborg, Sweden	I have BF 2.75". A lot of noise at 3000 rpm, I use one rear silencer and a 100 cells cat. I´m thinking of using the middle silencer next year and I was hoping it would not be so boomy with two silencer. JohnS: tip of the day. I will use v-band next year Coupé Fiat 20V Turbo Plus 1999, T19 Mitsubishi turbo https://youtu.be/O9qrLj3Ap00 Now FCP Stage3!

Re: recommend me an exhaust [Re: Freddan72] #695352 21/10/2008 18:52 21/10/2008 18:52
Joined: Dec 2005 Posts: 17,367 Staffordshire Nigel OP Forum veteran
Nigel OP Forum veteran Joined: Dec 2005 Posts: 17,367 Staffordshire	my current setup is 3" downpipe, running into a taper section for the decat - its then 2.5" all the way back. I must admit, I have considered fitting a valve in the downpipe, with the gasses normally going through the SuperSprint, but at the flick of a switch, it turns into a VERY short side-exit pipe. Now THAT would be loud $\:D$

Re: recommend me an exhaust [Re: Nigel] #695382 21/10/2008 19:23 21/10/2008 19:23
Joined: Dec 2005 Posts: 928 Wimbledon paddy Enjoying the ride
paddy Enjoying the ride Joined: Dec 2005 Posts: 928 Wimbledon	Just one thing to potential consider I think the point of having more than one silencer to capture the exhaust gas resonations at different frequencies and revs, so hopefully you are less likely to get booming at a particular rev range. I also hear think stainless steel exhausts tend to be a bit louder than mild steel ones too...

Re: recommend me an exhaust [Re: paddy] #695457 21/10/2008 21:02 21/10/2008 21:02
Joined: Dec 2005 Posts: 17,367 Staffordshire Nigel OP Forum veteran
Nigel OP Forum veteran Joined: Dec 2005 Posts: 17,367 Staffordshire	mild steel gives a softer, more mellow sound. Stainless can tend to be a bit more harsh and tinny (although some stainless systems soften as they are heat cycled over a long period of time)

Re: recommend me an exhaust [Re: Nigel] #695465 21/10/2008 21:09 21/10/2008 21:09
S suba Unregistered
suba Unregistered S	I thought Supersprint was 2.25 inch Nigel? $\:\?$

Re: recommend me an exhaust [Re: ] #695509 21/10/2008 22:16 21/10/2008 22:16
Joined: Dec 2005 Posts: 17,367 Staffordshire Nigel OP Forum veteran
Nigel OP Forum veteran Joined: Dec 2005 Posts: 17,367 Staffordshire	could well be - I really can't remember

Re: recommend me an exhaust [Re: Nigel] #695516 21/10/2008 22:22 21/10/2008 22:22
M MiniPit Unregistered
MiniPit Unregistered M	Originally Posted By: Nigel could well be - I really can't remember That's why i asked you about your exhaust size $;\)$ I've got a Supersprint decat and it's 2.25 inch. I imagine it is the same size for the cat-back. Last edited by MiniPit; 21/10/2008 22:24. Reason: I'm so bad with English language! lol

Re: recommend me an exhaust [Re: ] #695586 21/10/2008 23:42 21/10/2008 23:42
Joined: Dec 2005 Posts: 1,576 Glasgow,Near Florence..If only... paul My life on the forum
paul My life on the forum Joined: Dec 2005 Posts: 1,576 Glasgow,Near Florence..If only...	yup s/sprint is 2.25,Barbz considered the Blueflame was well good for 400bhp,and was impressed by the build maybe better with a 3" downpipe going into the 2.75 blueflame sysytem was Paul S,now just paul...Member since Oct 2000,Coupe may be FATALLY injured - :(oh no it's not

Re: recommend me an exhaust [Re: paul] #695601 22/10/2008 00:45 22/10/2008 00:45
T TurboJ Unregistered
TurboJ Unregistered T	Mine is 3" all the way. Mandrel bends with two 3" silencers. It sounds just like a Subaru on the outside and not too noisy on the inside however Squid has the same setup but due the coupes poor sound proofing it sounds more droney inside. http://www.torque-exhausts.com/

Re: recommend me an exhaust [Re: ] #695602 22/10/2008 01:21 22/10/2008 01:21
W woody123 Unregistered
woody123 Unregistered W	im having an exhaust system made and fitted to my 20VT by long life in the morning..was thinking of going for a 2.25 but i mite go for a 2.5 cat back with a de-cat pipe made up but not fitted..

Re: recommend me an exhaust [Re: Nigel] #695612 22/10/2008 06:59 22/10/2008 06:59
J Jari Unregistered
Jari Unregistered J	I have 3" stainless steel exhaust pipe allway through with 2 silencer, no cat. It is boomy in around 2000 - 2250 rpm, upwards very quiet. Especially above 4000 rpm it is nice to drive, you can hear wheel and wind noises better than exhaust noise. My friend has 2 x 2" back pipes after 3" downpipe, which makes flow area app. 2.8" and it is good for 445 bhp/6700 rpm and the power curve was rising. So, his pipe was definetely not restrictive in that power level. - Jari -

Re: recommend me an exhaust [Re: ] #697201 24/10/2008 22:36 24/10/2008 22:36
Joined: Dec 2005 Posts: 35 whitehaven B Bunflash Discoverer
Bunflash Discoverer B Joined: Dec 2005 Posts: 35 whitehaven	I have a stealth 3 inch system which has had the centre box (where the cat normally is) replaced with the largest box i could fit under there. 10" by 8" i think. This reduced the boomyness of the more than useless resonance only box. Ive also had the V band removed and a 5 stud flange welded in place as i'm now running the 28rs. Its still as most big systems are, boomy between 2 and 3 grand but not at all an issue like it used to be.

Re: recommend me an exhaust [Re: Bunflash] #697283 25/10/2008 09:32 25/10/2008 09:32
Joined: Dec 2005 Posts: 4,831 Haslemere, Surrey M Mark_S Forum is my job
Mark_S Forum is my job M Joined: Dec 2005 Posts: 4,831 Haslemere, Surrey	Been very pleased with my Longlife, would recommend. $\:\)$ 997 C4S

Re: recommend me an exhaust [Re: Mark_S] #697363 25/10/2008 12:59 25/10/2008 12:59
C coupecraig Unregistered
coupecraig Unregistered C	If you can get yourself up here, you're welcome to borrow my 2.75" Blueflame system Nigel.

Re: recommend me an exhaust [Re: Mark_S] #697451 25/10/2008 16:54 25/10/2008 16:54
S suba Unregistered
suba Unregistered S	Depends which one as well I think - ask Kenno what he's heard about the one in around Clapham.

Re: recommend me an exhaust [Re: ] #697467 25/10/2008 17:32 25/10/2008 17:32
K Kenno Unregistered
Kenno Unregistered K	Yeah - I wouldn't use the one in Battersea/Clapham. The franchise owner of Longlife was doing burnouts on the forecourt in a customers Viper. I also had a couple of things done to my exhaust by them and I could have welded it neater myself. Barbz used to use the guys in Carshalton.

Re: recommend me an exhaust [Re: ] #697489 25/10/2008 18:14 25/10/2008 18:14
Joined: Dec 2005 Posts: 4,831 Haslemere, Surrey M Mark_S Forum is my job
Mark_S Forum is my job M Joined: Dec 2005 Posts: 4,831 Haslemere, Surrey	Think that's were I had mine done $\:\)$ 997 C4S

Re: recommend me an exhaust [Re: Mark_S] #697510 25/10/2008 19:12 25/10/2008 19:12
W woody123 Unregistered
woody123 Unregistered W	mine was done at carshalton..he did my de-cat pipes on my Audi S4.. he told me he worked for torque italia for many years and knows the coupe inside and out.. very happy with my system..

Hop To