>From: Gregory T Fieldson <fieldson@jhunix.hcf.jhu.edu>
>Notes on TR7 exhaust systems:
>2. I recently installed a free-flowing exhaust header (whatever brand
>Vic.Br. carries) and find that there is very little clearance between one of
>the pipes and the frame/body. The pipe rattles against the car during
>startup and under hard acceleration. Does anyone think that this is going
>to hurt expensive parts (things other than the exhaust pipe, and the paint
>on the frame). Would stiffer engine mounts prevent this, or can I even
>shave the RHS engine mount a little to move things over (I imagine that this
>would generally weird the alignment of a lot of parts)? The head pipe
>doesn't look to be very easily bent.
The concern I'd be wary of is the fact that the TR-7 cylinder head
is aluminum and that is what the exhaust manifold/header is bolted
into. If the interference with the frame is severe enough it could
cause enough stress on the manifold/header bolts to eventually
strip out of the aluminum head. That's just theory on my part,
but not something I'd want to contend with.
As to stiffer engine mounts solving the problem, it could just be
that your original engine mounts need to be replaced and the new ones
might provide better clearance.
------------------------------------------------------------------------
Bill Sohl (K2UNK) BELLCORE (Bell Communications Research, Inc.)
Morristown, NJ email via UUCP bcr!dancer!whs70
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