993tt - 100 cell cats
Discussion
VS
I had Cargraphic 100 cell cats + rear boxes fitted on my 993 TT a few years ago, by Parr.. total cost was I think about 3.5k..including fitting, cats are mega expensive.!
There was a noticeable improvement in power and torque, think it takes it from 408 to about 430/440.. but low down torque really gave more of a shove in the back.
Sound was fantastic.. speedboat idle, then a rip through the revs, but not too intrusive or loud, unlike my current bypass pipes.
BTW am having these pipes removed by Parr on Monday.. Snetterton.. Tues.
I had Cargraphic 100 cell cats + rear boxes fitted on my 993 TT a few years ago, by Parr.. total cost was I think about 3.5k..including fitting, cats are mega expensive.!
There was a noticeable improvement in power and torque, think it takes it from 408 to about 430/440.. but low down torque really gave more of a shove in the back.
Sound was fantastic.. speedboat idle, then a rip through the revs, but not too intrusive or loud, unlike my current bypass pipes.
BTW am having these pipes removed by Parr on Monday.. Snetterton.. Tues.
VS, here is a possible thread that might interest you 
:
www.pistonheads.com/gassing/topic.asp?f=48&h=0&t=163039
: www.pistonheads.com/gassing/topic.asp?f=48&h=0&t=163039
and that includes them in teh package. 
Try AMD at www.amdtechnik.com; I think their price is £850+VAT to rebuild standard cats with 100 cell cores. Not sure who they get the cores from; I believe FVD sell them separately as well if you're up for a bit of diy with an angle grinder and soldering iron.
From AMD's website it could be interpreted that 100 cell cats are worth up to 15bhp and 20 ft/lbs. Rennlist opinions seem to vary with someone claiming to have put both standard and sport cats on a flow bench and found negligible difference. But all the German tuners include them fairly early on in the improvement packages so go figure.
From AMD's website it could be interpreted that 100 cell cats are worth up to 15bhp and 20 ft/lbs. Rennlist opinions seem to vary with someone claiming to have put both standard and sport cats on a flow bench and found negligible difference. But all the German tuners include them fairly early on in the improvement packages so go figure.
Hello All
The 100 cell cat substrates of the right size were supplied by Blackthorne Autocatalysts, www.autocats.com.
Instead of just welding them into the current tubes, we made new input and output cones to fit within the original shadow which showed a marked improvement over the standard ones on a flowbench.
There is a company called stax engineering who would probably do the welding etc. for anyone who wanted it done.
In truth I can see the logic of buying a proven kit from someone like Ruf, I just fancied sourcing all of the bits myself.
Car is currently up with Colin so will be able to report back in a while.
The 100 cell cat substrates of the right size were supplied by Blackthorne Autocatalysts, www.autocats.com.
Instead of just welding them into the current tubes, we made new input and output cones to fit within the original shadow which showed a marked improvement over the standard ones on a flowbench.
There is a company called stax engineering who would probably do the welding etc. for anyone who wanted it done.
In truth I can see the logic of buying a proven kit from someone like Ruf, I just fancied sourcing all of the bits myself.
Car is currently up with Colin so will be able to report back in a while.
aceparts_com said:
Personally I'm gonna wait and go down the Ruf R road if things go well at ACE plc/empire
Matey, if I knew several years ago what I've gleened via PH's Porsche cognoscenti in recent times, I'd be coming along with you to further line AR's pension fund.
I'm mindful of the Adam T R-Turbo car: the first time I encountered it at a Brunters session and how stunningly well packaged it was.
Not just the engineering integrity mechanically but the attention to detail ito trim and roll bar installation fitment.
Certainly, when I consider the modest northern terraced I've frittered away on the beetle since 2001 and the broadly unsatisfactory nature of what I'm left with, I do wonder whether ultimately, I too will have to ponder this looming inevitability..?
{Word on the vinus grapium is that various packages exist, to satisfy most apetites!
} That, or a 996TT...nooooo!!!
Steve,
On an entirely financial basis, I have been painfully profligate and the results mixed.
I have entirely lost the basic car's GT credentials (for example, it's a dog on the m-way unless you're doing over 150 when it rather 'sits down' on it's suspension and bludgeons forth): by seeking some sort of fast road cum possible track hybrid I've achieved neither - it's just too heavy to be any good on track and below 150 the old M5 is vastly preferable for boulevarding with gusto.
Sometimes, when I can't be arsed liposuctioning my way into the Catertin, the modified harshnesses of the beetle is deterrent enough and more often than not, it's the rounded ability of the super saloon BMW which gets the requisite caning for that day's hoon.
Yes, it's accelerative urge is spectacular and for B-road shennanigans it can still deliver dollops of that variously distilled 911 essence, a real schpincter twitcher and thrillmeister in extremis.
But once you're off the numpty free route and mixing it with the masses, you yearn for the civility of a 996 or yes...a standard 993tt (I think!)
I vaguely recall my car when first it arrived and it was quite simply refined: reasonably comfortable and utterly tractable even during the monsoon and really, the 'spikey' gains that have been variously brought to bear upon it's delivery are I suspect, unsubtle next to the Ruf variants - but I am assuming this.
Going back to the m-way; I've discussed this with everyone but nobody ever seems to have a suggestion: there is, at certain speeds and revs, such a pronounced sense of 'squirm' that it feels as if something somewhere is simply being overwhelmed, maybe a driveshaft or the like? It's a vibration that utterly dominates the experience and resonates through the whole car, seat, pedals & wheel - it feels, for want of a better phrase - f@cking 'orrible and I really don't know how much of it is generic DNA of the strainus 993 or something else.
I'd rally like someone who knows these cars properly to diagnose this because it is probably the one thing driving me further and further away from respect for the design as time progresses.
A 600 bhp rated Skyline R34 feels so much nicer.
HELP!!!
On an entirely financial basis, I have been painfully profligate and the results mixed.
I have entirely lost the basic car's GT credentials (for example, it's a dog on the m-way unless you're doing over 150 when it rather 'sits down' on it's suspension and bludgeons forth): by seeking some sort of fast road cum possible track hybrid I've achieved neither - it's just too heavy to be any good on track and below 150 the old M5 is vastly preferable for boulevarding with gusto.
Sometimes, when I can't be arsed liposuctioning my way into the Catertin, the modified harshnesses of the beetle is deterrent enough and more often than not, it's the rounded ability of the super saloon BMW which gets the requisite caning for that day's hoon.
Yes, it's accelerative urge is spectacular and for B-road shennanigans it can still deliver dollops of that variously distilled 911 essence, a real schpincter twitcher and thrillmeister in extremis.
But once you're off the numpty free route and mixing it with the masses, you yearn for the civility of a 996 or yes...a standard 993tt (I think!)
I vaguely recall my car when first it arrived and it was quite simply refined: reasonably comfortable and utterly tractable even during the monsoon and really, the 'spikey' gains that have been variously brought to bear upon it's delivery are I suspect, unsubtle next to the Ruf variants - but I am assuming this.
Going back to the m-way; I've discussed this with everyone but nobody ever seems to have a suggestion: there is, at certain speeds and revs, such a pronounced sense of 'squirm' that it feels as if something somewhere is simply being overwhelmed, maybe a driveshaft or the like? It's a vibration that utterly dominates the experience and resonates through the whole car, seat, pedals & wheel - it feels, for want of a better phrase - f@cking 'orrible and I really don't know how much of it is generic DNA of the strainus 993 or something else.
I'd rally like someone who knows these cars properly to diagnose this because it is probably the one thing driving me further and further away from respect for the design as time progresses.
A 600 bhp rated Skyline R34 feels so much nicer.
HELP!!!
Blimey Derestrictor - that doesn't sound good! It shouldn't be the fault of the PSS9 suspension, because my underpowered version with only 450 bhp is absolutely fine whether hammering the Mway or trickling through numptyville. I suppose that's the principal advantage of an OEM power upgrade package, which is effectively what Mr. Ruf would sell you given his accreditation and reputation.
Are you sure that you haven't lost a wheel balance weight or something banal like that?
Are you sure that you haven't lost a wheel balance weight or something banal like that?
derestrictor said:
Going back to the m-way; I've discussed this with everyone but nobody ever seems to have a suggestion: there is, at certain speeds and revs, such a pronounced sense of 'squirm' that it feels as if something somewhere is simply being overwhelmed, maybe a driveshaft or the like? It's a vibration that utterly dominates the experience and resonates through the whole car, seat, pedals & wheel - it feels, for want of a better phrase - f@cking 'orrible and I really don't know how much of it is generic DNA of the strainus 993 or something else.
Are the engine and gearbox mounts in good shape? With all that power they'll see a bit of load. If they're original they might well be knackered. I think the original engine mounts are oil filled and some have been known for self-induced vomiting of their life's blood.
phelix said:
Are the engine and gearbox mounts in good shape? With all that power they'll see a bit of load. If they're original they might well be knackered. I think the original engine mounts are oil filled and some have been known for self-induced vomiting of their life's blood.
Thanks for that suggestion - that sounds eminenetly possible: I don't think any techies to date have checked this out but it does indeed feel 'load related.'
Do any of you lot suffer from 'torque dissipation' judder when backing off from high(ish) throttle openings? If not, then why the hell does mine?
Again, this is the sort of grotty harshness that ruins the repertoire.
{Along with incurably squeaky brakes and a semi-race spec clutch whine which in retrospect was a pointless development.}
Still, one day...I live in hope!
Der, you've made my day. I was out only yesterday giving the dick a good spanking and thinking how could this possibly get any better. Plant it in any gear and it just squats and goes forth. The GT3 seats hold you in nicely and the standard suspension keeps you from losing too many fillings.
When I got back I was talking to my very impressed friend about possible upgrades and he simply said 'Why?'
To what problem is XXXXX (in this case, more power) a solution?
As you've saved my £10K I'm gonna pop a cheque for half in the post to you.
Oh and the drive shunt - no, mine doesn't make any at all. Sounds like a mount(s) gone to me.
When I got back I was talking to my very impressed friend about possible upgrades and he simply said 'Why?'
To what problem is XXXXX (in this case, more power) a solution?
As you've saved my £10K I'm gonna pop a cheque for half in the post to you.
Oh and the drive shunt - no, mine doesn't make any at all. Sounds like a mount(s) gone to me.
Very kind of you, Aceparts, I think it's fair to say I semi-regret my mindless upgrade path.
I still suspect Herr Ruf may hold all the answers but I'm not sure my testicles could take any more.
(Having aid all this, if my vibrational issues are mount related, that'll be a sweet relief: a return to the standard clutch would also significantly restore the pointless grind of the current set up and then I might feel a whole lot better.}
Btw, glad to hear about your GT3 seats - aren't they great? Any thoughts on going for a ridiculously small steering wheel, too? Two of the best ammendments to the standard issue, imho.
DeR.
I still suspect Herr Ruf may hold all the answers but I'm not sure my testicles could take any more.
(Having aid all this, if my vibrational issues are mount related, that'll be a sweet relief: a return to the standard clutch would also significantly restore the pointless grind of the current set up and then I might feel a whole lot better.}
Btw, glad to hear about your GT3 seats - aren't they great? Any thoughts on going for a ridiculously small steering wheel, too? Two of the best ammendments to the standard issue, imho.
DeR.
I keep considering all sorts of 'upgrades' but for 99% of the time (and that includes track work) it's fine as it is. I've done loads at bedford and only the more focused cars (or drivers!) come past and I get a nice drive home.
Grass isn't always greener.
>> Edited by aceparts_com on Sunday 28th August 00:30
Grass isn't always greener.
>> Edited by aceparts_com on Sunday 28th August 00:30
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