Paul,

What type of environment should a heat shield be designed for? How
hot can it get with a SS cover surrounding the headers? (P Port 2nd
gen with 2.85:1 PSRU) It would also need to be isolated from where
it is attached to any augmenter ducting.  I found some thin silicon
reinforced sheet good for 480 F.  Could that be used to isolate the
shield mount?  Thanks for any help

Joe Berki
Limo EZ
Avionics almost done

I have never measured the temp in that situation as to do it
I would have to take off the cowl. That would allow it to cool.

You should use .025 SS 304 spaced about a quarter inch out from
the headers. SS has low heat transfer characteristics.
Use a blast tube to blow cool air in between the sheet and
the headers. You can use another SS sheet with some kind of high
temp insulation on the fiberglass cowl in the vicinity.

The two SS sheets should be separated by about another 1/4 inch.

Paul Lamar


Ceramic coatings keep the heat in the exhaust. If on headers or the stock
manifold, if it flakes off it just goes with the flow. Header wrap on the
outside of the heat shield would also keep the heat inside the shield and then
ducted away.

Dale Davies

Header wrap is not a good idea with a rotary. You want to cool
them pipes as much as possible.

Paul Lamar