Menu toggle

Sports silencer: 3 outlets?

911hillclimber

911hillclimber

PCGB Member
Member
My trusty and very nice sounding Listritz '2.4' 3 outlet silencer is about done for after 18 years of use....Found a few pin holes and it was getting a bit loud for the hillclimbs @ 108 dB.
Do they still make these? The factory in Germany make tube manipulation machines/parts now.
I think this one came from the first Husband Crawley autojumble I ever attended, maybe Transend.

I do not want to fit a standard 911 twin inlet silencer (too quiet) so what options can you suggest please?

Graham

CAC8C85FA356471FA2F20DAD515CF60A.jpg
 
I have just had one made by Autofarm. It was a Dansk stainless steel double inlet/single outlet, modified iwth 2 extra central outlets with removable caps. Contact Jack Phillips at Autofarm for details
 
Thanks Nick.
Will call Jack. Also found a twin outlet at Transend for 280 +vat, but the box must be neibough and motorsport friendly!
 
With the two centre outlets plugged the Autofarm silencer is slightly noisier than standard as they change the internal baffles slightly. The Transend one maybe the same as one that I bought years ago from Mittel, judging by the weight it has very little inside it. I have just fitted it to a 3.2 short sroke, it is certainly not quiet, but it would be easy enought to attach aftermarket can type silencers on the outlets.
 
That is what i feared with the Transend one, too loud generally.
I cap myine at present and i guess the level is about 97dB, but opened (all 3 uncapped) the level is 108dB, right on the legal limit for a hillclimb car...
Sure sounds good open and the 3.2 revs much freer as a result.
I'm sure I've read an article in Porsche Post maybe about someone doing this as a mod?
 
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
Archant Dialogue
Back
Top