OK, I'll wait on Paul. Are you planning a NA and turbo version? I know that your installation is a turbo. Obviously more complex than a NA manifold. For the NA, we'll still need at least one drawing of an ideal upper manifold as the mold will be non-trivial.
I was about ready to go with Tracy's flange, some standard 90 bends, and make a secondary flange to complete the lower manifold. If Paul is working on another solution, I'll just wait.
Scott Gettings
Its a turbo version. The new plan E is a 180 degree version.
I got no commitments from my friend to make the patterns yet Scott.
So I would not wait. You can fab one from RB Wagner bends for
about the same cost. Just a lot more work with tig welding required.
Sketches below.
Paul Lamar
I was planning on only having the lower manifold turning 90 degrees, to save weight and less welding. Similar to the stock NA manifold, just simpler and lighter. No problem doing the second 90 degrees in carbon fiber, nor wrapping them around the block in the most efficient manner.
Do you think the best location for the runner pairs is close together (as per the drawings), or more fore-and-aft pairs? The current drawing is very similar in location to the stock lower manifold alignment (I didn't measure it, though).
It would be nice to have an upper manifold mold that others could also use. A one-off lower manifold would make the mold far less useful unless it was built to standard specs.
Scott Gettings
It is as easy and as cheap for us to do a 180 degree as a 90 degree
and it will save $45 in tubing bends. For a turbo motor with a lot
of heat in that area carbon fiber might be a problem.
If Tracy does not have any flanges left Mazdatrix has some.
I grouped the pipes like that to lower them as much as possible
for use on those airplanes with very little cowl clearance
such as a Kis Cruiser or Lancair 320/360.
Paul Lamar
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