> > > Al Gietzen wrote:
     > > >
     > > > > I have an inconel tangential manifold/muffler on my 20 - photo
     > attached (made by
     > > > > Mark (can't remember last name), a la David Atkins).  The inconel
     > tubes extend
     > > > > through the heavy Racing Beat Flange, but are welded on the outside -
     > not on the
     > > > > inside.  Although having the tubes go through the flange may have made
     > the
     > > > > welding easier, I'd guess that once you get that weld bead around
     > there the
     > > > > resulting strength is no better then butting it up and wleding it.
     > Seems it
     > > > > should be welded on the inside end so the flange can support the loads
     > on the
     > > > > tube. There obviously will be significant thermal stress set up and
     > the unit
     > > > > expands and the engine doesn't.

     > >  Al....can you give us an idea of what the cost from Dave Atkins was for
     > such an exhaust system?  Thank you. Paul Conner

     As I recall it was $1450.  Of course it has internal vanes to prevent "swirl-flow
     choking" (my idea) which added a bit to the cost.  Have no idea if they are necessary.

     Al

 
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