On Tue, 5 Apr 2005, at around 11:04:07 local time, Bill Davies
<bill@rarebits4classics.co.uk> wrote:
>> -----Original Message-----
>> From: spitfires-owner@autox.team.net [mailto:spitfires-
>> owner@autox.team.net] On Behalf Of Michael Hargreave Mawson
>>
>> I guess that answers my question about whether tubular inserts would
>> cause a problem with the flow of exhaust gases. If Toyota and Fiat
>> both design them in, there can't be any real reason for concern.
>
>Hi Mike,
>Triumph design them in too, just not in the case of the 1500 exhaust. In the
>case of the 1200, 2000 and other exhaust manifolds, the pipe is continued
>into a recess in the manifold so that the gasket is shrouded. This is not
>the same as just adding a piece of tube, the opening in the manifold is
>widened so that where the sleeve is fitted the overall bore remains
>constant. If you want to do this with a 1500 manifold you are going to have
>to speak nicely to the man at the machine shop. You're also going to need a
>different gasket as it's effective bore will now need to be wider to clear
>the sleeve,
Dear Bill,
That sounds both complicated and expensive. For some reason, my
posting to the list with an ASCII-art sketch of a suggestion for a
modified gasket doesn't seem to be making it through a filter somewhere.
I'll send you a copy privately so that you can see what I had been
considering.
ATB
--
Mike
Michael Hargreave Mawson, author of "Eyewitness in the Crimea"
http://www.greenhillbooks.com/booksheets/eyewitness_in_the_crimea.html
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