In the last
weeks Aad and me have been making an extra large version of our
Weber IDF setup for a certain mister W who will put it on a 124"
engine. I bought an S&S G manifold and a Weber IDF 44 for
measurements and started designing. To make things interesting
mister W wanted the manifold to be as short as possible. In previous
manifolds we bent our own bends with a radius of 125 millimeters,
but for this manifold I bought some prefabbed welding bends with
a 100 mm radius. Ofcourse we could have made these ourselves but
we wanted to save some time.
The building
method was pretty much the same as for the IDF 40 manifolds, so
I won't repeat all the details. The CNC machined carb flanges
we had made earlier were designed for 40 mm carbs so the holes
had to be enlarged to 44 mm. Aad had already welded the whole
manifold when we realised we had forgotten to make the holes bigger,
so Aad welded the O-ring grooves shut and machined the gasket
area perfectly flat. We ended up welding together a steel support
frame that allowed us to put the whole manifold in a lathe and
we carefully machined the holes to 44 mm, smoothly flowing into
the bends.
