[Healeys] Downpipes

[Bob Spidell]

Thanks, Michael.

Sounds like you have an 'oversized' exhaust; I think the original system 
is 1.75" (that's what AHS says theirs is). I'd hope a header would give 
a couple more HP.

Bob

On 9/19/2024 8:50 AM, Michael Salter wrote:
> Hi Bob, after searching in vain for a company in NA I finally found a 
> company in Christchurch New Zealand who were able to bend some 2" 
> exhaust tube to exactly the correct shape based on the original 
> drawings of which I have a copy. To that pipe I TIG welded a new 
> flange, which I had flame cut, and a section of flex pipe of the 
> correct type but made from stainless steel. The whole process was a 
> little expensive but this has been on my BN1 for 10 years and many 
> thousands of miles.
> I had the need to remove it this summer and the flex is as flexible as 
> it was when installed and serving its purpose admirably and the mild 
> steel tubing has still got some of the high temperature paint on it.
> I'm not a brilliant welder but I certainly managed to produce a very 
> satisfactory weld.
>
> M
>
>
> On Wed., Sep. 18, 2024, 10:36 p.m. Bob Spidell via Healeys, 
> <healeys at autox.team.net> wrote:
>
>     Listers,
>
>     The exhaust downpipes for both 4- and 6-cyl cars have a section of
>     flexible tubing before the connection to the muffler. I've always
>     assumed this was to allow for the rocking of the engine, and the fact
>     the system is affixed with fairly rigid hangers (at least, until the
>     rubber part disintegrates). I've also heard the flexpipe is to allow
>     easier fitment from the downpipe to the muffler, which won't
>     necessarily
>     be perfectly aligned. Of course, both reasons could be true.
>
>     I'm asking the knowledge-based, LLM model List because I'm
>     considering
>     an aftermarket header from AH Spares for my BN2/100M. The repop down
>     pipe I have now is malformed, and the clutch pedal arm comes in
>     contact
>     with it at full clutch pedal, and I've heard this is common in the
>     repops (yes, I could just bash the downpipe, but that would be
>     tacky and
>     sometimes that can cause a ticking noise, which would annoy me even
>     more). But, the AHS pipe doesn't have the section of flexpipe so I'm
>     wondering if it's really needed. I have a TIG and I'm not terrible
>     with
>     it, but the header and, presumably the flex tubing are SS, which
>     I'm not
>     practiced in welding.
>
>     Thanks for any suggestions.
>
>     Bob
>     _______________________________________________
>     Support Team.Net http://www.team.net/donate.html
>     Suggested annual donation  $12.75
>
>     Archive: http://www.team.net/pipermail/healeys
>     http://autox.team.net/archive/healeys
>
>     Healeys at autox.team.net
>     http://autox.team.net/mailman/listinfo/healeys
>
>     Unsubscribe/Manage:
>     http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20240919/2d2e4e3b/attachment.htm>