I had the all the flanges water-jet cut from ½”
304 SS. I had a buddy do it for me, material costs were ~$80, and it
took ~1/2 hr on the machine. Water-jet machines can range from $100-$150
/ hr. from what I hear, so that should give you an idea on cost.
Here is a .zip file with the AutoCAD drawings for all
the flanges.
If you need a viewer for .dwg files, download Voloview
express.
http://usa.autodesk.com/adsk/index/0,,837403-123112,00.html
All the lines are closed plines, which means they can
directly import them to the CNC machine. This will save a lot of time
for whoever cuts them.
The only one without the holes is for the WG. I
didn’t have the proper measuring tools for the funky hole pattern at the
time. It’s easy to drill these using the WG for a jig.
The turbo inlet flange has small holes that will have to be drilled through, or tapped. I am just using through bolts. Other than that the holes are perfect throughout!