Quote:
Originally Posted by rwy95eclipse
what would be a good header to run with my setup
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Forced Performance: FP DSM Race Manifold
I've built 120 tig welded turbo manifold assemblies for a major OEM that have gone through cyclic heat testing on engine dynos with the failed parts submitted for complete engineering analisys. What the experience taught me is that the mechanical characteristic of the tubing completely change at high tempurature. Steel, even 304 stainless, becomes very weak at the EGT we run. The combination of high heat and carbon in our exhaust, attacks the material and alters it's metalurgical structure. The result is corrosion between the actual grains in the steel and the formation of cracks. Add some stress from a turbo hanging off of it or a downpipe with no flex, and you are certain to have issues.
If you want a tubular manifold, there are only two workable solutions:
Use a "stabilized" alloy such as 321 stainless steel. (huge money)
Use "weld els" like you see commonly in a Ron Shearer manifold
::ShearerFabrications.com - Products::
For the rest of us, there is the Shearer designed FP manifold