I was told that inconel is what was used in jet engines to take the heat. It was the only thing that would take the heat and not crack. I hope thats correct, cause I reached real deep in my pockets to insure I was doing the right thing for my application. Gonna be a real pisser if it cracks! Expecially if I go down in flames!

Bob Mears
Supermarine Spitfire

Those hot section vanes have N-2 compressor air pumping through them to extend their life spans. They do crack, and in some cases the crack can be ignored if there is only one. Or, a single vane or some number of vanes can be replaced Or a nick can be filed down and polished. Total hours between hot section checks and the number of starts must be recorded. But crack they do.................

 

A little cooling air on the exhaust system is a good idea. On the dyno those things glow a bright orange and heat up anything in a line of sight. Shielding is a must. A thick walled stainless tube covered in heat wrap gets the job done and the lack of under-hood heat is amazing.

 

Lynn E. Hanover