[928uk] Advice and parts - intake tubes
Simon Watson
simonwatson at unitelconsultants.co.uk
Sat Jun 8 22:01:42 UTC 2024
PS. You can send them on WhatsApp if you like, my number is 07970 840959.
Thanks
Simon
Simon Watson
07970 840959
Sent from my iPhone
> On 8 Jun 2024, at 22:50, kenworthy via 928uk <928uk at lists.928.org.uk> wrote:
>
> Hi Simon,
> Sent you an email regarding intake tubes, did you not receive it?
> Regards,
> Duncan
> 79 928 auto
>
>
>
>> On 2024-06-08 21:31, Simon Watson via 928uk wrote:
>> Intake noise is good! In my opinion. And on BMW M3 e46 cars when
>> fitted with the CSL air box. It sounds amazing!
>> Thanks for the information Smiffy, I never knew that and had always
>> wondered why the 928 has the strangely shape tubes.
>> Best Simon
>> Sent from my iPhone
>>>> On 8 Jun 2024, at 20:07, Paul R Smith via 928uk <928uk at lists.928.org.uk> wrote:
>>> Correct, from the 1981 service tech info:
>>> "These tubes are now designed as venturi nozzles to effectively dampen the engine’s intake noise.
>>> Due to the aerodynamic shape the air stream is not restricted.
>>> Sound waves, which are pressure impulses from the engine against the direction of air stream flow,
>>> are reflected “inward” on the inside walls of the tapered nozzles and prevented from reaching the
>>> intake opening in the car’s front end.
>>> As on earlier models air is drawn from housing (2) through opening (1) for cooling of the toothed
>>> belt (3)."
>>> I suspect only test equipment can detect the difference in the noise.
>>> Smiffy
>>>> On 08/06/2024 19:42, Ben Hodges wrote:
>>>> Isn’t the Venturi shape of the plastic ones an attempt to reduce noise too?
>>>> On Sat, 8 Jun 2024 at 18:48, Simon Crowe via 928uk <928uk at lists.928.org.uk> wrote:
>>>> I could never hear any difference between the plastic on my S4 and
>>>> the foam on my GTS.
>>>> When they did finally fall apart (I think the inner wires rusted
>>>> heavily and the foam detached itself) I bought a pair of
>>>> plastic/rubber hoses from an Italian company, specially designed
>>>> for the 928. A perfect fit and I still have them.
>>>> > On 8 Jun 2024, at 18:15, Paul R Smith via 928uk
>>>> <928uk at lists.928.org.uk> wrote:
>>>> >
>>>> > According to PET, they started in 1987 for Switzerland, 1992
>>>> for all markets.
>>>> >
>>>> > Smiffy
>>>> >
>>>> >> On 08/06/2024 17:25, phil rick via 928uk wrote:
>>>> >> learn something new every day, i thought the crap foam hoses
>>>> only came with
>>>> >> the GTS, but must have started on the 91 model year
>>>> >>
>>>> >> On Sat, Jun 8, 2024 at 5:21 PM jonathanrackowe--- via 928uk <
>>>> >> 928uk at lists.928.org.uk> wrote:
>>>> >>
>>>> >>> Oh yes, thanks, I'd forgotten that. Can't say I noticed any
>>>> difference in
>>>> >>> noise level when I fitted the Samco silicone tubes, but maybe
>>>> that's due to
>>>> >>> my de-catted custom exhaust system! :-D
>>>> >>>
>>>> >>> Best regards,
>>>> >>> Jonathan
>>>> >>>
>>>> >>> West London, England
>>>> >>>
>>>> >>> 1991 928 GT Amethyst Metallic with Blueflame custom exhaust
>>>> and Porsche
>>>> >>> 18" Sport Design wheels
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>> -----Original Message-----
>>>> >>> From: 928uk<928uk-bounces at lists.928.org.uk> On Behalf Of Paul
>>>> R Smith
>>>> >>> via 928uk
>>>> >>> Sent: 08 June 2024 15:24
>>>> >>> To:928uk at lists.928.org.uk <mailto:To%3A928uk at lists.928.org.uk>
>>>> >>> Subject: Re: [928uk] Advice and parts - intake tubes
>>>> >>>
>>>> >>> The official reason for the foam hoses was to reduce noise:
>>>> >>> "All 928 GTS vehicles are fitted with noise-reducing intake
>>>> hoses of the
>>>> >>> same type used previously on export vehicles
>>>> >>> for Switzerland."
>>>> >>> From the 1992 service tech info document.
>>>> >>>
>>>> >>> Smiffy
>>>> >>>
>>>> >>> On 08/06/2024 14:07, jonathanrackowe--- via 928uk wrote:
>>>> >>>> My 928 GT has a pair of Samco SHL77 Silicone Hoses 77x640mm
>>>> installed -
>>>> >>> that
>>>> >>>> I fitted back in 2006. They're still perfect.
>>>> >>>>
>>>> >>>> The foam hoses that Porsche fitted to the 928 GT and GTS were
>>>> rubbish!
>>>> >>> The
>>>> >>>> insulation was intended to keep the intake air cool, but it
>>>> disintegrated
>>>> >>>> badly. Given the speed of the air rushing into the 32V V8
>>>> engine I doubt
>>>> >>>> that the foam hoses made any significant difference to the
>>>> intake air
>>>> >>>> temperature anyway.
>>>> >>>>
>>>> >>>> Best regards,
>>>> >>>> Jonathan
>>>> >>>>
>>>> >>>> 1991 928 GT Amethyst Metallic
>>>> >>>>
>>>> >>>>
>>>> >>>>
>>>> >>>> -----Original Message-----
>>>> >>>> From: 928uk<928uk-bounces at lists.928.org.uk> On Behalf Of Ian
>>>> Marsh via
>>>> >>>> 928uk
>>>> >>>> Sent: 07 June 2024 16:06
>>>> >>>> To: 'Cengiz Ali'<cengizali at btinternet.com>; '928 List'
>>>> >>>> <928uk at lists.928.org.uk>
>>>> >>>> Subject: Re: [928uk] Advice and parts
>>>> >>>>
>>>> >>>> Cen,
>>>> >>>>
>>>> >>>> I can't help with much of what you require but I gave up
>>>> looking for
>>>> >>> decent
>>>> >>>> intake tubes and bought a pair of Mercedes Tubes modified to
>>>> fit 928's
>>>> >>> from
>>>> >>>> Roger and 928rus.
>>>> >>>>
>>>> >>>> The genuine Porsche replacements were about twice the price
>>>> in in my
>>>> >>> opinion
>>>> >>>> inferior in design.
>>>> >>>>
>>>> >>>> Hope this helps
>>>> >>>>
>>>> >>>> Regards
>>>> >>>>
>>>> >>>> Ian
>>>> >>>>
>>>> >>>> Ian J Marsh
>>>> >>>> Regional Organiser
>>>> >>>> 07976 242344
>>>> >>>> West Country Region
>>>> >>>>
>>>> >>>>
>>>> >>>>
>>>> >>>> -----Original Message-----
>>>> >>>> From: 928uk<928uk-bounces at lists.928.org.uk> On Behalf Of
>>>> Cengiz Ali via
>>>> >>>> 928uk
>>>> >>>> Sent: Friday, June 7, 2024 4:01 PM
>>>> >>>> To: 928 List<928uk at lists.928.org.uk>
>>>> >>>> Subject: [928uk] Advice and parts
>>>> >>>>
>>>> >>>> Hi All,
>>>> >>>>
>>>> >>>> It was good to see some of you at Simply last weekend.
>>>> >>>>
>>>> >>>> A few things please:
>>>> >>>>
>>>> >>>> Does anyone on the list know if the warning triangle
>>>> originally came in a
>>>> >>>> storage bag (similar to the jack)? If so are they available
>>>> or does
>>>> >>> anyone
>>>> >>>> have one they are willing to sell?
>>>> >>>>
>>>> >>>> Also, I have an old Porsche tyre inflator, the one that is in
>>>> its own
>>>> >>> black
>>>> >>>> plastic box and runs off the cigarette lighter. It runs but
>>>> is pretty
>>>> >>> weak
>>>> >>>> and not producing enough air to fill a tyre, can these be
>>>> repaired?
>>>> >>>>
>>>> >>>> Also, does anyone have a very good black plastic intake pipe
>>>> that runs
>>>> >>>> either side of the air box to the front of the car ducts they
>>>> want to
>>>> >>> sell?
>>>> >>>> Many thanks
>>>> >>>> Cen
>>>> >>>> S2 auto 86.5
>>>> >>>>
>>>> >>>>
>>>> >>>
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