High,Terry!
15.6.2017
Spiral mixing with sock reversing we have done by DJ and others.
Dj’s VOLVO has both!
The out flow tube to the left is going in the thick part over half ways to the right, toward the horizontal “gasoline-air” intake.
That makes the “sock reversing” when gas is comming from below and air is comming through the upper tube, both spiralling anti-clockwise around the inner, output tube to the left.