Keith and Mayf, sorry for being late to this party, but here is a thought.
It depends on the specific alloy, but aluminum generally melts around 1150F.
It looses 50% of its strength around 550F-600F. (Except for the new
aluminum-lithium alloys). If your EGT is 1400F-1700F, but the gasket
interface is not that hot due to cooling and radiation, it most certainly
has ZERO compressive strength. You now have a ductile material that will set
(or compress) due to clamping force, vibration, moment loads, etc. It no
longer has the properties that made it a good gasket in the first place.
-Elon
Date: Sat, 19 Jan 2008
From: "Keith Turk" kturk@ala.net
You sure it won't ever go over say 1500 degrees? Hmmm I'm thinking the
dead soft aluminum in an NA package might be cool.... be just a bit scared
of it with the turbo's...
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