[Healeys] Down Pipes - The Final Saga

[Bob Spidell]

re: "NOS BN1 mild steel down pipe never been installed. No rust. Minimum 
20 years old - No flex solid as a rock."

Doesn't seem right to me; there may be rust that isn't visible. I'd 
spray penetrant oil on it a few times and 'work' it; I'd bet it will 
loosen up.

On 10/24/2019 6:00 PM, Harold Manifold wrote:
> Since we are using science and design of experiments I would like to 
> add to the research.
> Test 1 - Brand new AH Spares (Bell) SS down pipe - 1" of flex with 
> moderate hand pressure.
> Test 2 - Same as above for the other down pipe.
> Test 3 - NOS BN1 mild steel down pipe never been installed. No rust. 
> Minimum 20 years old - No flex solid as a rock.
> BTW the NOS BN1 pipe is for sale. It would be suitable for a concourse 
> restoration.
> Regards,
> Harold
>
> ------------------------------------------------------------------------
> *From:* Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of 
> *Bob Spidell
> *Sent:* Thursday, October 24, 2019 7:28 AM
> *To:* healeys at autox.team.net
> *Subject:* Re: [Healeys] Down Pipes - The Final Saga
>
> re: "... hen brand new do the mild steel down pipes ever show any sign 
> of flex?"
>
> If you mean does the flexible section, well, flex?  Yes, they do; 
> maybe an inch or two of deflection at the end.
>
> Bob
>
> On 10/24/2019 6:52 AM, Neil McDonald wrote:
>> An exciting subject indeed!
>>
>> I am about to fit an unused mild steel down pipe that I have had on 
>> the shelf for maybe ten years. No sign of rust but I am away from 
>> home right now so can not test it for flex. I might zap it with WD40 
>> before fitting - can’t hurt.
>>
>> The question is - when brand new do the mild steel down pipes ever 
>> show any sign of flex?
>>
>> Neil
>> BN6
>>
>> On Thu, Oct 24, 2019 at 2:42 PM Perry via Healeys 
>> <healeys at autox.team.net <mailto:healeys at autox.team.net>> wrote:
>>
>>     Listers
>>
>>     As a follow up to my post on 10/18 on this exciting subject, I
>>     decided to do an experiment with a couple downpipes I had in the
>>     parts bin. Both pipes are new old stock and have never been on a
>>     car.  One is stainless and the other mild steel. Both have been
>>     laying on a shelf in the garage for at least 9 years.
>>
>>     The test was to measure how much deflection was noted in the flex
>>     portion of the downpipe when the tip (where it enters the
>>     muffler) is loaded with a weight. The upper portion of the pipe
>>     was firmly held by the bench vice.
>>
>>     Should have started with something less then 10 pounds but the
>>     stainless moved considerably under that weight.  The mild steel
>>     did not budge.
>>
>>     At 47 pounds I heard a creaky noise but no movement on the mild
>>     steel. I then applied an unspecified force with my hand to the 47
>>     pounds and no movement.
>>
>>     My conclusion is that the mild steel flex pipe, once it takes a
>>     set, ie, Gets Rusty, does not flex. It is the weak link that will
>>     fail but it might as well be a piece of regular pipe.
>>
>>     Perry
>>
>>     Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>
>>     for Windows 10
>>
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>> ____________________
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>>
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