Protecting the interior of the cowling from radiated heat is a big deal,
especially if you have a turbo under there acting like a big piece of
charcoal.  We used a product called Zetex 800 Aluminized to provide protection
on the lower cowl of the Eagle540 installation.  (Lots of other Lancair guys
have used this material as well for the same reasons with both the Lycoming
TSIO540 and Continental TSIO550 installations.)  It's a pretty expensive
alternative, one that required us to put together a group buy, of sorts... one
guy worked as the coordinator to purchase the 50 yard roll (minimum), everyone
bought their 1 or 2 yard orders from him.  Take a look at the Newtex website
(http://www.newtex.com/home.htm), they're the company that manufactures the
product.  It's basically a glass fiber cloth with an aluminized surface bonded
to one side.  We applied it with red (hi-temp) RTV silicone sealant to
anyplace that was subject to directly radiated heat (ie, sides of the cowling
facing the turbos, undersides of intercooler ducts that face the exhaust
manifolds).  I thought I had some photos that showed the installation, but
apparently I do not.  I'll try to take a couple tomorrow and send them along.

  <Marv>