Re: Thermal underwear

[steveb@newkla.kla.com (Steven Buchholz)]

> >I wonder if it is "worthwhile" to insulate the airbox (intake air stream
> in general, which includes about 10% of the engine compartment on my
> UrQ! amazing how Audi stuffed 50% of the engine compartment into the
> right 20% of the engine compartment...) from the engine heat?<

I don't remember seeing the original post, but I would highly recommend 
insulating the hose that goes from the airbox outlet to the turbo inlet.
That hose costs over $100, and if unprotected the heat from the exh/turbo 
cooks the material.  I ended up using a piece of insulation that I bought
from a part number on the fiche but never exactly figured out where it
was supposed to go.  It appears to be made from a sheet of pretty flexible
metal (probably aluminum) covered with a layer of fiberglass and then 
another layer of foil.  The thing was shaped like a squared of U channel
like it was supposed to go over a suspension bit or something.  I formed
it to go around the hose in such a way as to allow the hose to be able to 
flex, but still be shielded by the new piece, and am holding it in place 
with a hose clamp.

Otherwise the intake tract bits that are close to the exhaust & turbo are
made of fairly substantial metal (as least on my '83 they are).  I wonder
how much insulation you'll be able to do.  OTOH I have been considering 
either wrapping the exhaust with insulation or getting it "Jet hot" coated.
Any thoughts or experience on that out there?

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Steven L. Buchholz	KLA Instruments Corporation - RAPID Engineering
s_buchho@kla.com	M/S A1-3400, PO Box 49055, San Jose, CA 95161-9055
(408) 456-6244 (office/voice mail)	(408) 434-4284 (fax)
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