D cat Pipe and Others

SteveJC · Jan 19, 2011

Hi
Since purchasing my Targa in early December, I have started carrying out the jobs I feel I need to do to get the car as I would like it. One of the items I want is a D Cat pipe, the car already as a G pipe . Will the D Cat in conjuntion with the G pipe be too loud ?, Does anyone run with the 2 changes ?.

The other things I'm sorting out
A small amont of rust near the rear window, a chip repaired on the rear bumper about the size of a 5p piece and 2 small areas on the doors where you could see the outline in the body work from the old flag mirrors.
New Cup mirrors.
New steering rack ( I knew this needed changing when I bought the car ).
Retrimming the front seats and door cards ( the drivers seat had worn a little especially the piping )
A set of Cup 1 alloys ( waiting to collect )
Full service

I'm finding the car a real pleasure to drive, taking the Targa top off on the one bright day we had was just perfect, in fact I will use it a lot more than previously intended.
I will be taking it to Donnington on the 10th of July to see how it goes and to look at other 964's.

Steve

gregmarshall · Jan 20, 2011

Too loud for what?

This is my father in Law's C4 with D-cat and G-pipe... probably a bit loud for some trackdays!

This is 105.5dB @4000RPM

SteveJC · Jan 20, 2011

Too loud for what ?.

I suppose I meant too loud as not to be an annoyance to others and that you are still able to hold a conversation with your passenger without raising your voices or listening to the radio , the last comment re the radio is a bit pointless has if I'm on my own I tend to turn the radio off and listen to the sound from the exhaust .
I hadn't thought about it being track unfriendly, has I'm booked in to Donnington that may could create a problem.

Steve

da_gleadless · Jan 20, 2011

I have a D Cat and a Cup pipe on my targa... its quite loud!

For me its not too loud and having a conversation isnt really an issue (depending on your rpm at the time lol), though the engine noise is just poetic

Maybe there is someone nearby who has similar Mods you can meet before taking the plunge?
(I'd be happy to if your anywhere near London)

On a seperate note, is there an issue with tracking targas due to rigidity?

Steve Brookes · Jan 20, 2011

As Greg points out, two alterations to the exhaust tend to get you to or over 105 db (static test). Personally I think that's a nice noise and as long as you have a normal interior (i.e. not stripped back to the metal) it's not intrusive on long journeys. You might annoy a few neighbours if you start it up early in the mornings and you will have problems getting on track days unless you buy a silencer tip to put on (which are quite expensive). From what I've seen and heard the order of noise tends to go like this:

Cat, standard, standard = quietest (about 98 db)
Decat, standard, standard
Cat, cup pipe, standard
Cat, standard, G pipe
Decat, cup pipe, standard (about 105 db)
Cat, cup pipe, G pipe
Decat, standard, G pipe
Decat, cup pipe, G pipe = loudest (makes your ears bleed)

The first four combinations will get you on most tracks. The others are borderline or no chance!

p.s. No reason to not track a targa if you want to [

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mcgc0 · Jan 20, 2011

Hi Steve,

I have both and can say all will be fine - as Steve points out below. The noise is great but definately not too loud to make any motorway journey uncomfortable. I love it and so do the kids - it's the only way they know I'm home before opening the door!

Bought a new expensive tailpipe and maybe didn't fit it correctly 'cos as soon as it was attached it was much louder, which must be down to an unsealed fitting when coupled to the G pipe. Original tailpipe back on until I find the time to have another go..

Cheers

Marcus [FONT=verdana,geneva"]

SteveJC · Jan 20, 2011

Hi
Thank you for your responses, I think I need to hear one for myself, I'm based in the West Mids but travel a fair bit, in Swindon this Saturday and Autofarm the following Saturday any one with this exhaust combination not too far from either or somewhere in between.

Chris what part of London ?. I've seen a few Targa's track and hill climb and as it's more for fun ,and to use the car legally at a bit more speed ( for most I believe )

Marcus Do you track your car ?.

Steve

da_gleadless · Jan 20, 2011

I'm near Brixton, but work out west (usually only take the car on a friday or not all in the winter).

I have no experience in tracking at all, but quite randomly i read a comment earlier about a targa not been suitable for a track car which made me raise the question.

I certainly would like some track experience, though I'm not going to track the car until I'm happy with the cars state, which comes first!

That being said I'm torn between my targa and a coupe. The targa is in great condition (after a good 4k in 12ish months) so It would be a shame to swap it, though a coupe would suit me more as I don't have a garage and my targa has been a (beautiful) pain

turbo jonny · Jan 21, 2011

Cant believe this myth of targas being not rigid enough for track - we are talking Porsche here not some old British iron !
The 964 series was a big improvement and i would hazard a guess that a 964 Targa is more rigid than previous coupe models.

da_gleadless · Jan 21, 2011

I wasn't sure so thought I'd ask.

Heres what prompted me (Taken form Rennlist 91 Targa thread):

"you might want to check out the seller's story. if you look closely at the background of the third pic, you can see an impact bumper car with number decals and 18" twists. he might know a thing or two about tracking Pcars and if he does he should know the targa wouldnt work. he has a reason for dumping it so soon or maybe he got a really good deal and is trying to flip the thing."

Its all good news though, it means I can give it some n the track when the time is right[

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