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"Russell Duffy" <13brv3@bellsouth.net>:
Any experience with this Fiberfrax stuff?<<<
Lancair has used Fiberfrax as the insulation between the stainless steel firewall sheet and the fiberglas structure since the early days. It's interesting stuff to work with, rather fragile to handle, but apparently completely up to the task of holding back large amounts of heat. If I were trying to wrap a turbo with it I would be looking for a way to encapsulate it in a heavy foil of some sort... it has very little strength of its own and needs to be well supported. The heat shields that are used on the turbos of the Eagle 540 V8 that I'm working on are filled with the stuff, and the outside skins are made of stainless steel, pretty heavy stuff, probably .010-.012 thick per wall. The shield is a sandwich... SS, fiberfrax, SS, then shaped to fit the turbo and bolted on as an assembly. Looks kind of like a quilt. HTH
<Marv>
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