[Healeys] Down Pipes - The Final Saga

[Bob Spidell]

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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> ____________________
> Neil & Pam McDonald
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