100 cell cats

leesweeney · Feb 28, 2007

Exhausts again. Having spent a nearly totally happy 12 months with my new RSR mufflers I now feel the call of something louder.

Heard a 993 with the full Gemballa system and thought was great (though lost a bit of the Porsche sound) but a) they have stopped making it and b) when they did it was £2200 plus £950 for the 100 cell cats. Ahem! that seems a little expensive.

My local independant who have been marvellously good with every other bit of advice have suggested I consider leaving the RSR's on but changing the Cats to 100 cell which they reckon will greatly imrpove the sound.

So: has anyone any experience of changing to 100 cell cats and what do you think? Are there any problems to worry about? Can they cause any damage? Will anything else need changing?

Oh - and how much does the sound improve. I am going for fairly loud as this car is a weekend car and I want to feel like I am in a bloodspitting sports car. Sad I know. Having said that I don't want to be deaf before 40.

Thanks in anticipation of your help.

RichardLW · Feb 28, 2007

Let me know how this pans out as its on my list of things to do.

leesweeney · Feb 28, 2007

ORIGINAL: RichardLW

Let me know how this pans out as its on my list of things to do.

Sure will - I am at Strasse tomorrow as they are hopefullyu getting a 100 cell cat car in that I could listen to. Hasn't the RSR's though so wont give me a true sound compared to mine.

sidned · Feb 28, 2007

Lee,

I have Supercups on my car along with a standard cat and they sound great. They have baffle inserts to reduce the noise substantially when running day to day, but when they are removed, they make a fantastic noise! They're pretty good even with the baffles in.
Where in the UK are you located? You are more than welcome to drop by if you want to listen in person. I live in Northampton, just off J15 of the M1.

leesweeney · Feb 28, 2007

ORIGINAL: sidned

Lee,

I have Supercups on my car along with a standard cat and they sound great. They have baffle inserts to reduce the noise substantially when running day to day, but when they are removed, they make a fantastic noise! They're pretty good even with the baffles in.
Where in the UK are you located? You are more than welcome to drop by if you want to listen in person. I live in Northampton, just off J15 of the M1.

A really generous offer but I just off J39 M1 so a fair bit of a journey. If I get a day free I'll drop you a line because I'd love to hear them.

leesweeney · Feb 28, 2007

ORIGINAL: sidned

Lee,

I have Supercups on my car along with a standard cat and they sound great. They have baffle inserts to reduce the noise substantially when running day to day, but when they are removed, they make a fantastic noise! They're pretty good even with the baffles in.
Where in the UK are you located? You are more than welcome to drop by if you want to listen in person. I live in Northampton, just off J15 of the M1.

Have you had any problems with the cats?

sidned · Mar 1, 2007

No problems at all with the cats. They are standard and seem happy to run with the Supercups.
I'll be attending the Silverstone Classic event this year if you're coming down, and I shall probably go to the event in September as well so maybe we will meet up at one of these events.

kennyboy · Mar 1, 2007

I think 100 cel cats are the way to go for you Lee - from what i've heard and read they should provide the sound and characteristics you're after. I understand they may also add a sporty crack and pop on the overrun

Didn't fit them myself on my carrera though did a lot of research before moving to the tt. I would go for the more expensive makes such as cargraphic or techart to ensure you don't get the dreaded resonance.

These systems are expensive but IMO worth it due to the sound and power improvement - I believe the cats are the only area on the 993 exhaust system where bhp improvements can be made.

100 cell cats are also essential when seeking higher power outputs - if you do it you may want to consider another visit to Wayne to optimise your map to the reduced back-pressure and liberate the extra horses, though I'm sure you'll be fine if you don't.

Rennlist may have some guys who've done this on there.

edit: almost forgot - these cats also give a substantial weight saving, always good when chasing those DB9's down to Le Man eh Lee!

leesweeney · Mar 1, 2007

ORIGINAL: kennyboy

I think 100 cel cats are the way to go for you Lee - from what i've heard and read they should provide the sound and characteristics you're after. I understand they may also add a sporty crack and pop on the overrun

Didn't fit them myself on my carrera though did a lot of research before moving to the tt. I would go for the more expensive makes such as cargraphic or techart to ensure you don't get the dreaded resonance.

These systems are expensive but IMO worth it due to the sound and power improvement - I believe the cats are the only area on the 993 exhaust system where bhp improvements can be made.

100 cell cats are also essential when seeking higher power outputs - if you do it you may want to consider another visit to Wayne to optimise your map to the reduced back-pressure and liberate the extra horses, though I'm sure you'll be fine if you don't.

Rennlist may have some guys who've done this on there.

edit: almost forgot - these cats also give a substantial weight saving, always good when chasing those DB9's down to Le Man eh Lee!

Thanks Kenny,

Strasse had a car in today with what they thought were the standard exhausts but the cats and it definitely sound loads better, even with standard exhausts. Wayne will definitely get another visit if I do it though.

Getting quite excited now!

leesweeney · Mar 2, 2007

ORIGINAL: kennyboy

I think 100 cel cats are the way to go for you Lee - from what i've heard and read they should provide the sound and characteristics you're after. I understand they may also add a sporty crack and pop on the overrun

Didn't fit them myself on my carrera though did a lot of research before moving to the tt. I would go for the more expensive makes such as cargraphic or techart to ensure you don't get the dreaded resonance.

These systems are expensive but IMO worth it due to the sound and power improvement - I believe the cats are the only area on the 993 exhaust system where bhp improvements can be made.

100 cell cats are also essential when seeking higher power outputs - if you do it you may want to consider another visit to Wayne to optimise your map to the reduced back-pressure and liberate the extra horses, though I'm sure you'll be fine if you don't.

Rennlist may have some guys who've done this on there.

edit: almost forgot - these cats also give a substantial weight saving, always good when chasing those DB9's down to Le Man eh Lee!

Kenny,

The car Strasse had in was Oliver Thomas' who is regularly on this forum (993 C2S - his signature is 'Ring tested at 184000 miles'. I had a chat with him yesterday and his Cats are Dansk - sounded lovely even though was otherwise a standard exhaust. He told me Colin Belton from ninemesiter puts Dansk cats on the 993's instead of the Cargraphics etc and I guess if they are good enough for Colin, they're good enough for me. Plus, as you said they are cheaper and at £980 + VAT + about 3 hours labour + another £450 for Wayne to re-map the car that is more than enough. Any more and I could have upgraded to a tt!

So......the dansk cats are ordered and Strasse fit them next Wednesday. I have spoken with Wayne and he has me booked in for 2nd April (the first day he is free can you believe).

I think the DB9 is in for a surprise on the trip to Le Mans this year. Last year I was close but definitely playing second fiddle to him but then I had 278bhp and 260 lb ft, after Wayne's magic I already have 305bhp and 282lbft and with the new cats and another re-map I reckon I will have his 6.0l V12 licked! Might even give your wimpy tt a run for its money (OK, that's taking it a bit far)

timandlisa911 · Mar 3, 2007

If you do the cats you have to do a cup air box also for the real wow factor, i have a full cargraphics system and cup air box and it never fails to impress, i do however get a slight problem at MoT time and it just gets through the 105db limits at tracks. Good luck.
Tim 993 c2 LHD Reg No C2 LHD.[8D]

leesweeney · Mar 3, 2007

ORIGINAL: timandlisa911

If you do the cats you have to do a cup air box also for the real wow factor, i have a full cargraphics system and cup air box and it never fails to impress, i do however get a slight problem at MoT time and it just gets through the 105db limits at tracks. Good luck.
Tim 993 c2 LHD Reg No C2 LHD.[8D]

This is how it always starts - I'll just do a bit of this and that and before you know it you're on the slippery slope big bills and major alterations. I have the Porsche motorsound airbox and (think) I'll make do with that for the time being anyway.

Thanks for reassuring me though that I wont have problems with MOT's and 105db track days.

kennyboy · Mar 5, 2007

Nice one Lee - yeah I too have read the Dansk cats are a quality product.

Make sure you do the proper 993 anorak thing and:
1. post up how much weight you've lost.
2. post up a sound clip.

looking forward to it!

leesweeney · Mar 7, 2007

100 cell Cats now fitted!

Together with RSR's all I can say is WOW[

] I am one happy chappy. Sounds like a slightly quieter Le Mans racer - really deep noise that rises beautifully to the red line but lost non of the Porsche flat six sound. ABSOLUTELY FABULOUS - exactly what I hoped for.

It may be a bit too loud for some - but if you are not overly sensitive I would recommend the 100 cell Cats plus RSR's 100%.

kennyboy · Mar 7, 2007

Congratulations Lee - I'm glad you got there in the end!

Looking forward to seeing/hearing...

RichardLW · Mar 7, 2007

Lee

One question - does it pop and bang? (Please say yes....)

Richard

kbooker · Mar 7, 2007

Lee,
Are you going to Harewood again this year, if so I'd like to have a listen if you don't mind!

leesweeney · Mar 7, 2007

ORIGINAL: RichardLW

Lee

One question - does it pop and bang? (Please say yes....)

Richard

In reply to Richard and Kevin,

Richard first - yes it pops and bangs, not quite flame spitting (I don't think from the drivers seat anyway) but worth holding the throttle ppen and then closing it quickly to get those pops on the overrun (especially when not fully warmed - though I wouldn't rev it hard obviously)

And Kevin, yes I will be at Harewood and you are very welcome to listen.

Now I have also driven home from work down the M1 I can also comment that on a constant throttle at motorway speeds it sounds little louder than before, is definitely not boomy or buzzy and would be easy to live with on a daily basis. In fact, this was a big surpirse but you don't need to raise your voice to speak or turn the stereo up at all.

Wind the windows down though, drop it down a couple of cogs and floor it and my god, it is sex. It really is a very deep growl and you feel you can almost hear each and every cylinder fire! I think it's the deepness of the sound that surpises me.

Sorry for blabbering on lads but I am like a pig in muck.