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Sutton
Spa-Francorchamps


Joined: 04 Mar 2009
Posts: 300
Location: Surrey


PostPosted: Sun Mar 26, 2017 6:08 pm    Post subject: Reply with quote

Hopefully Ch3tman is too busy out and about, enjoying his new setup.

For me, there were two major differences but I'll leave it for Ch3tman to relay his experience to you.
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ch3tman
Hockenheim


Joined: 08 Dec 2012
Posts: 698
Location: South Bucks

1995 Porsche 993 Carrera 4

PostPosted: Sun Mar 26, 2017 8:02 pm    Post subject: Reply with quote

^ Laughing exactly that! Some enjoyable miles covered today, the weather has been good for it Smile.

As for the most noticeable differences:

(feel free to comment Sutton!)

- A slightly louder and pronounced (deeper/mechanical?) sound on idle;
- Slightly more raspy when revving into the higher rpms;
- Seems slightly more free-revving and responsive- and although this could simply be the placebo effect, I think I noticed the same in Sutton's car too.

Just as importantly, and probably the thing holding me back before, was the worry of potential drone/resonance at cruising speeds, or it sounding 'unsociable' in residential areas . Luckily there has been none of this so far... massive plus points.

Do bear in mind I've only covered around 110 miles so far, and the characteristics may change over time, as the miles are racked up. So I invite others to contribute and add to my limited experience...
 
  
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Tue Apr 16, 2019 10:44 am    Post subject: Reply with quote

Credit where credits due. very helpful thread via the search facility.

End result 200 cells cats and RSRs booked at Gerts May 2019.

cheers

Ian
 
  
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Ghost
Estoril


Joined: 11 Sep 2006
Posts: 3933
Location: In absentia


PostPosted: Tue Apr 16, 2019 12:07 pm    Post subject: Reply with quote

Exactly the combination that I have and I love it.

Dirty looks from pensioners when I rumble past after a cold start, priceless Grin
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Tue Apr 16, 2019 12:17 pm    Post subject: Reply with quote

Ghost wrote:
Exactly the combination that I have and I love it.

Dirty looks from pensioners when I rumble past after a cold start, priceless Grin


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Cameltoe & Heel
Barcelona


Joined: 26 Jan 2009
Posts: 1301
Location: Preston - Lancs


PostPosted: Tue Apr 16, 2019 12:21 pm    Post subject: Reply with quote

I have the RSR's but a standard Cat, happy with the sound so far but maybe go for the 200 Cell inserts for the standard Cat to avoid fitment issues.

Trev
 
  
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pierrebear
Spa-Francorchamps


Joined: 27 Sep 2017
Posts: 258
Location: Jersey


PostPosted: Tue Apr 16, 2019 1:16 pm    Post subject: Reply with quote

I love the sound of the RSRs on mine and have been contemplating getting 200 cell cats too.

Out of interest, I think mine might be *significantly* louder than standard on the basis that I had Gert "RSR" the mufflers I previously had on - Dansk Sports sound ones that were horribly droney. Christian (colt) commented as much when I last saw him. I decided I'd see just how loud they are and (admittedly only using an iphone app) they recorded 117.7 db at 5k revs. Surprised
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Tue Apr 16, 2019 1:43 pm    Post subject: Reply with quote

pierrebear wrote:
I love the sound of the RSRs on mine and have been contemplating getting 200 cell cats too.

Out of interest, I think mine might be *significantly* louder than standard on the basis that I had Gert "RSR" the mufflers I previously had on - Dansk Sports sound ones that were horribly droney. Christian (colt) commented as much when I last saw him. I decided I'd see just how loud they are and (admittedly only using an iphone app) they recorded 117.7 db at 5k revs. Surprised


That does sound loud. Might be a tad distorted reading obviously.
 
  
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pierrebear
Spa-Francorchamps


Joined: 27 Sep 2017
Posts: 258
Location: Jersey


PostPosted: Tue Apr 16, 2019 2:43 pm    Post subject: Reply with quote

Croydon wrote:
That does sound loud. Might be a tad distorted reading obviously.


Agreed - might well be distorted especially as only a free iphone app. On the plus side, it doesn't drone like the Dansk ones used to, and I love it. Glad I am not in London anymore. Don't imagine it would be much fun driving it along Waterloo Bridge today!

Floor
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Mon May 06, 2019 4:06 pm    Post subject: Reply with quote

Just returned from Gerts (Carnewal), RSRs, 200 cell cats, Motorsound airbox and big ovals all sorted. Loving the car.
 
  
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Surinder Randhawa
Montreal


Joined: 10 Mar 2007
Posts: 511
Location: St Albans


PostPosted: Tue May 07, 2019 12:01 pm    Post subject: Reply with quote

Great work.. I'm planning to go down to see Gert this summer. I have the RSR's tempted by the 100 cell insert. Not sure if they will be too loud over the 200 cells ??
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Tue May 07, 2019 12:08 pm    Post subject: Reply with quote

Surinder Randhawa wrote:
Great work.. I'm planning to go down to see Gert this summer. I have the RSR's tempted by the 100 cell insert. Not sure if they will be too loud over the 200 cells ??


Im no expert but I think it might get a little boomy in the cabin with 100 cells. I had to switch off my engine at the Chunnel booth to hear what the offical was saying re my earlier crossing!

Ian
 
  
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Surinder Randhawa
Montreal


Joined: 10 Mar 2007
Posts: 511
Location: St Albans


PostPosted: Tue May 07, 2019 12:15 pm    Post subject: Reply with quote

Yes good point don't want it boomy I'll ask gert its not for the noise but for the performance gain.. !! either that or a complete fabspeed or cargraphic set up
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Tobesetc
Albert Park


Joined: 02 Jun 2014
Posts: 1535
Location: West London, UK


PostPosted: Tue May 07, 2019 1:34 pm    Post subject: Reply with quote

Another vote for 200C and RSRs - awesome combo.

Love mine.
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Endoman
Barcelona


Joined: 11 Apr 2011
Posts: 1341
Location: Bolton U.K.


PostPosted: Tue May 07, 2019 1:39 pm    Post subject: Reply with quote

Tbh I think the most you get from exhaust mods is noise. If your old cats are bunged up then you may get a slight improvement. The silencer design is pretty restrictive as standard and some free flow ones will cause unpleasonant resonances usually caused by removing the internal baffle plate.
I have used std, RSR,Dansk sport, Fabspeed and self modded ones.
The worse for boom were Dansk, best sound RSR (higher note) or Fabspeed (lower note)
As for cats; std, Cargraphic x-pipes, Fabspeed xpipes cat and decat.
Cargraphic were crap really badly made.
Fabspeed are beautiful a work of art, the decats are just too noisy and give loads of pops and bangs on overrun.
My current is a full Fabspeed system which is quiet at idle and gives a good throaty roar on wot. It is a bit intrusive at speed but a lot of interior sound deadening has been removed. You can hear the radio motorway cruising but get on the twisties and forget it.
Strange thing is since fitting a Vram manifold everything is a bit quieter.
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Surinder Randhawa
Montreal


Joined: 10 Mar 2007
Posts: 511
Location: St Albans


PostPosted: Tue May 07, 2019 3:36 pm    Post subject: Reply with quote

HI Endoman so your saying the 100 cells or 200 cells don't really give you any performance gain ? what about if you eliiminate the cats and fit bypass or cross pipes ? design911 options are quoting 8-9HP gain and of course the benefit of the reduced weight..
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Tue May 07, 2019 3:46 pm    Post subject: Reply with quote

It could all be in my head but my car seems to feel like its picking up a bit quicker now (200 cell cats). Alos If I wanted to upgrade my map at a later date it would work very well im told.

Ian
 
  
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Croydon
Spa-Francorchamps


Joined: 21 Jun 2003
Posts: 322



PostPosted: Tue May 07, 2019 3:47 pm    Post subject: Reply with quote

Surinder Randhawa wrote:
HI Endoman so your saying the 100 cells or 200 cells don't really give you any performance gain ? what about if you eliiminate the cats and fit bypass or cross pipes ? design911 options are quoting 8-9HP gain and of course the benefit of the reduced weight..


rereading the whole thread is a good idea regarding the 100/200 cell cats etc..
 
  
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Endoman
Barcelona


Joined: 11 Apr 2011
Posts: 1341
Location: Bolton U.K.


PostPosted: Wed May 08, 2019 11:00 pm    Post subject: Reply with quote

Any claims in the 10-15 bhp region would not be noticeable even if they exist. Don't forget to cash in your old cat they are worth quite a bit as scrap.
What you want is mid range torque and flexiblity for normal use.
My racing MG was completely flat below 4000rpm which made it totally impractical for road use, but it did give 135bhp from 1600cc which was pretty good for an engine from 1958. The 9m heads on a 993 give amazing performance the inlet throats are narrower than std but better flow gives increase in midrange torque and with Motec and RS cams John Spears car produced 350bhp from 3600cc, costa plenty though. IIrc exhaust was standard.
You wouldn't get on track at Oulton with decat pipes, way too loud.
I had RSRs fiited soon after I got the car nearly 20yrs ago and liked them.
Then the cargraphic x-pipes with 200cell cats, never liked them.
A tail pipe broke off the RSRs so I fitted Dansk sports didn't like them either.
So I binned the whole sytem and fitted Fabspeed which I love.
A load of cash wasted and a few lessons learned.
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Surinder Randhawa
Montreal


Joined: 10 Mar 2007
Posts: 511
Location: St Albans


PostPosted: Thu May 09, 2019 11:11 am    Post subject: Reply with quote

Thanks for the info Endoman will give 9m a call on the header work. RSR engineering was the other option
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