Menu toggle

Exhaust for RS

Guest

Guest

New member
I am considering changing my exhaust on the RS which at present runs on the factory standard lay out.Have read past threads on the subject and the various components you can use like G pipes, mufflers and cat bypass etc,etc but I am clueless as to the best way to go and to keep it legal for track days, advice please and also the places to source the parts, I have heard Miltek do a good product.

Dick
 
964RS basically consists of three pipes for a standard car. Cat Pipe, Rear Silencer and End Silencer same as 964C2/4. It is very normal to have a Cat ByPass which does not add anymore db, however you can replace the rear silencer with a Cup Pipe (Standard Cup Car and N/GT) which brings the car up to 105db so on the limit for most Track Days, this is just a simple pipe/tube and can be sourced from any specialist website, £100+. This is a very light bit of kit and saves a lot of weight as well as giving a better sound and in my opinion gives more performance a must for any 964/RS. The fun starts with the end silencer which can be replaced by a G-Pipe if done inconjunction with a Cup Pipe you will be at about 110db, the end silencer also weighs a ton. Some replace the end silencer and leave the rear silencer which makes little sense, some replace both and enjoy the fantastic sound but very limited track opportunities...........
 
I had cat bypass and cup pipe and was 108-109db.

Swapped the cup pipe back for normal silencer and am back to 104db which gets me on at Oulton Park (who tend to do more stationary tests than most) and is fine for drive by elsewhere.
 
ORIGINAL: jason

I had cat bypass and cup pipe and was 108-109db.

Swapped the cup pipe back for normal silencer and am back to 104db which gets me on at Oulton Park (who tend to do more stationary tests than most) and is fine for drive by elsewhere.
Click to expand...

Jason,

So cat by-pass + rear silencer = 104db. What have you got for a secondary silencer - left as original, or G-pipe? I'm interested because my car has cat by-pass, cargraphic twin-outlet cup-style pipe and G-pipe and is too loud at the moment for most uk tracks (but sounds fantastic [:D]).

Rich
 
ORIGINAL: jason

I had cat bypass and cup pipe and was 108-109db.

Swapped the cup pipe back for normal silencer and am back to 104db which gets me on at Oulton Park (who tend to do more stationary tests than most) and is fine for drive by elsewhere.
Click to expand...

Ditto here -assume you are also running the final silencer like me?

I also keep a bolt-on tail pipe silencer handy if the noise test is marginal.

Loss of power by replacing the Cup Pipe was marginal below 5400......
 
My car has cup pipe and end silencer, so it sounds good and is not too loud for track days. Performance is also fine, in comparison with having rear silencer and end silencer it´s a big step forward.

This set up was standard for the 1990 Cup Car (also 1991 I think), so it should make sense.

I have no experience with running the car with cup pipe and without end silencer, probably that sounds fantastic but asks for tickets and for being kicked off at track days.

Standard rear silencer and a G pipe instead of the end silencer sounds good, but concerning performance that was senseless. (Had that on a standard 964 Cab)

So, if it was my car, I would have a cup pipe and the standard rear silencer.


Regards,

Hacki
 
Sorry, have to correct my post: If it was my car I would have a cup pipe and the standard end silencer.
 
Trouble is here Hacki, the noise police on track days!! Yes, the Cup Pipe does sound wonderful, but in order for me not to get kicked off Goodwood, Bedford, Oulton, Castle Combe, I added a C2 silencer instead......

However, come Porsche Club Spa-Francorchamps w/e next may, I think the Cup Pipe is going back on, plus a pocket full of ear plugs!!

You coming to that one mate?? Be good to see the Cup Tip in action!!
 
ORIGINAL: Rich Claridge

ORIGINAL: jason

I had cat bypass and cup pipe and was 108-109db.

Swapped the cup pipe back for normal silencer and am back to 104db which gets me on at Oulton Park (who tend to do more stationary tests than most) and is fine for drive by elsewhere.
Click to expand...

Jason,

So cat by-pass + rear silencer = 104db. What have you got for a secondary silencer - left as original, or G-pipe? I'm interested because my car has cat by-pass, cargraphic twin-outlet cup-style pipe and G-pipe and is too loud at the moment for most uk tracks (but sounds fantastic [:D]).

Rich
Click to expand...

Rich like Melv I've got the final silencer also and do keep a bolt on one just in case too....we must be car twins[:D]
 
ORIGINAL: jason

Rich like Melv I've got the final silencer also and do keep a bolt on one just in case too....we must be car twins[:D]
Click to expand...

Dick - sorry to hijack your thread, I hope you're getting the info you needed though.[:)]

Jason / Melv - what type of 'just in case' end silencer have you got? Is it something like this...
Merlin End Muffler

Many thanks,
Rich
 
ORIGINAL: Rich Claridge

So cat by-pass + rear silencer = 104db. What have you got for a secondary silencer - left as original, or G-pipe? I'm interested because my car has cat by-pass, cargraphic twin-outlet cup-style pipe and G-pipe and is too loud at the moment for most uk tracks (but sounds fantastic [:D]).

Rich
Click to expand...

Rich.....Is your system the full Cargraphic set up only I have the cargraphic set up, by-pass and twin outlet but mine is relatively quiet.
 
Lee,

I'm interested that you've described your car as relatively quiet. Have you had it noise tested for a trackday with your current set-up?

My system (as far as I can see by looking under the car and from it's history file) is as follows:

- Milltek cat by-pass
- Cargraphic Rear silencer with twin outlets (there is a Cargraphic plaque on the bottom of the silencer with product code: P64ET2 - is this the same as yours?) I've attached a piccie of Cargraphic's current system which looks like mine - although mine could be an earlier model.
- G-pipe (no secondary silencer)
- exhaust trims as number 2 on the pic.

I have a feeling the noise levels might also be helped by the drilled airbox - and the engine undertray is also removed (how much quieter might it be with it put back on?).

Is this any different to your set-up?
Many thanks,
Rich


37E347B7BFCC41228806947A95DBD4A6.jpg
 
Rich

I'll endevour to get the car on a ramp and take a picture of the system.. It may be the miltek bit of your system that makes the noise. My system is complete cargraphic inc the manifolds. I have no undertray and a drilled air box too but no issues with noise at Donnington for example.
 
Thanks Lee,

Pics would be interesting and also whether your rear silencer has the same product number. I believe my manifolds are standard RS - not Cargraphic.

I'm thinking I might get my car on a ramp to check for exhaust leaks, loose clamps and the like.

Do you know what the limit is at Donnington? 105dba?
Do they run the same test as Castle Combe - static, 4500rpm, 50cm away from exhaust?

Regards,
Rich
 
Rich

1.you have NO exhaust leaks

2. any baffles in the system will be nearing their end as the car has been used unlike the fairy garage queen which has done no miles in three years. I noticed it got louder as time went by.

3. Just f****** leave it as it is, the car is perfectly set-up and fully pulling mega horses (NO LEAKS) and just enjoy it.

4. You can do Ring, Spa, Brands and probably a few more, if it ain't broke don't fix it, that is the sexiest sounding most Fun RS around, leave it!

 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Back
Top