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Posted for Gary Casey <glcasey@adelphia.net>:
Craig,
I'm sure that .020 is plenty of clearances as you just don't want the
aluminum to touch and even if it touches it a few spots it will still do the
job pretty well (of course, it touches where you bolt it in place). I would
certainly worry a little bit about vibration, but if the aluminum is curved
it will be pretty stiff and not subject to a low frequency resonance. I'm
thinking about clamping an aluminum shield to the pipe itself, but you would
have a problem doing that, what with the odd shape of the turbocharger. To
use an aluminum radiation shield on the pipe it would be necessary to use
stainless pieces as spacers since the pipe will be at a temperature higher
than the melting point of aluminum. And then clamping a shield to the pipe
would expose it to extreme vibration, requiring a sturdy clamping system.
Advantage is that it would reduce the temperature of all nearby engine
compartment components, not just the cowl.
Gary Casey
I am thinking through adding a .020" thick stainless heat shield
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